KINDAI UNIVERSITY


*A space between the first name and last name, please enter

KOMINAMI Hiroshi

Profile

FacultyDepartment of Applied Chemistry / Graduate School of Science and Engineering Research
PositionProfessor
DegreePhD
Commentator Guidehttps://www.kindai.ac.jp/meikan/934-kominami-hiroshi.html
URL
Mail
Last Updated :2020/04/05

Education and Career

Education

  •  - 1993 , Kyoto University, Graduate School, Division of Engineering
  •  - 1988 , Kyoto University, Faculty of Engineering
  •   1984 04  - 1988 03 , Kyoto University, Faculty of Engineering

Academic & Professional Experience

  •   2014 04 ,  - 現在, Faculty of Science and Engineering, Kindai University
  •   2007 04 ,  - 2014 03 , Faculty of Science and Engineering, Kindai University
  •   2004 04 ,  - 2007 03 , Faculty of Science and Engineering, Kindai University
  •   2000 04 ,  - 2004 03 , Faculty of Science and Engineering, Kindai University
  •   1993 04 ,  - 2000 03 , Faculty of Science and Engineering, Kindai University

Research Activities

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Catalytic processes and resource chemistry
  • Nanotechnology/Materials, Inorganic and coordination chemistry
  • Nanotechnology/Materials, Basic physical chemistry

Published Papers

  • Photocatalytic hydrogenation of nitrobenzenes to anilines over noble metal-free TiO2 utilizing methylamine as a hydrogen donor, KOMINAMI Hiroshi, Applied Catalysis B: Environmental, Applied Catalysis B: Environmental, 2020 , Refereed
  • Photocatalytic hydrogenation of nitrobenzenes to anilines over noble metal-free TiO2 utilizing methylamine as a hydrogen donor, Makoto Fukui, Wakiko Koshida, Atsuhiro Tanaka, Keiji Hashimoto, Hiroshi Kominami, Applied Catalysis B: Environmental, Applied Catalysis B: Environmental, Dec. 2019 , Refereed
    Summary:Since reduction and oxidation reactions simultaneously occur over a photocatalyst, a hole scavenger (a hydrogen source in the field of organic chemistry) is required to obtain a reduced product. The use of organic waste as the hole scavenger is environmentally favorable because the organic waste is degraded during the photocatalytic reduction. In this study, methylamine was used as the hole scavenger for photocatalytic reduction (hydrogenation) of nitrobenzenes over a titanium(IV) oxide photocatalyst. Corresponding anilines were obtained almost quantitatively at room temperature and under atmospheric pressure without the use of a precious metal and hydrogen gas. Nitrobenzenes having reducible functional groups such as chloro and acetyl groups were chemoselectively hydrogenated to corresponding anilines with the groups being preserved. Various parameters affecting the efficiency and the rate of the photocatalytic reaction are discussed on the basis of results of the physicochemical analyses.
  • A silver-manganese dual co-catalyst for selective reduction of carbon dioxide into carbon monoxide over a potassium hexatitanate photocatalyst with water, Zhu Xing, Yamamoto Akira, Imai Shota, Tanaka Atsuhiro, Kominami Hiroshi, Yoshida Hisao, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 55(90), 13514 - 13517, Nov. 21 2019 , Refereed
  • Meerwein-Ponndorf-Verley-type reduction over a metal-free TiO2 photocatalyst in alcohol: Chemoselective hydrogenation of chlorobenzaldehyde to chlorobenzyl alcohol, M. Fukui, A. Tanaka, K. Hashimoto, H. Kominami, Chem. Lett., Chem. Lett., 45(8), 987 - 987, Aug. 2016 , Refereed
  • Metal ion-modified TiO2 photocatalysts having controllable oxidative performance under irradiation of visible light, Kitano Sho, Tanaka Atsuhiro, Hashimoto Keiji, Kominami Hiroshi, APPLIED CATALYSIS A-GENERAL, APPLIED CATALYSIS A-GENERAL, 521, 207 - 207, Jul. 05 2016 , Refereed
  • Copper-Modified Titanium Dioxide: A Simple Photocatalyst for the Chemoselective and Diastereoselective Hydrogenation of Alkynes to Alkenes under Additive-Free Conditions, Kominami Hiroshi, Higa Megumi, Nojima Taketo, Ito Tomohiko, Nakanishi Kousuke, Hashimoto Keiji, Imamura Kazuya, CHEMCATCHEM, CHEMCATCHEM, 8(12), 2022 - 2022, Jun. 21 2016 , Refereed
  • Organically modified titania having a metal catalyst: A new type of liquid-phase hydrogen-transfer photocatalyst working under visible light irradiation and H2-free conditions, H. Kominami, S. Kitagawa, Y. Okubo, M. Fukui, K. Hashimoto, K. Imamura, Phys. Chem. Chem. Phys., Phys. Chem. Chem. Phys., 18(24), 16079 - 16079, Jun. 2016 , Refereed
  • Control of Surface Plasmon Resonance of Au/SnO2 by Modification with Ag and Cu for Photoinduced Reactions under Visible-Light Irradiation over a Wide Range, Tanaka Atsuhiro, Hashimoto Keiji, Kominami Hiroshi, CHEMISTRY-A EUROPEAN JOURNAL, CHEMISTRY-A EUROPEAN JOURNAL, 22(13), 4599 - 4599, Mar. 18 2016 , Refereed
  • Synergy effect of photoabsorption due to band-gap excitation and surface plasmon resonance on selective photocatalytic oxidation of alcohols to ketones and aldehydes over silver-deposited silver iodide, Y. Nishino, A. Tanaka, K. Hashimoto, H. Kominami, Chem. Lett., Chem. Lett., 44(4), 518 - 520, Apr. 05 2015 , Refereed
  • Functionalization of Au/TiO2 Plasmonic Photocatalysts with Pd by Formation of a Core-Shell Structure for Effective Dechlorination of Chlorobenzene Under Irradiation of Visible Light, A. Tanaka, K. Fuku, T. Nishi, K. Hashimoto, H. Kominami, J. Phys. Chem. C, J. Phys. Chem. C, 117(33), 16983 - 16989, Aug. 22 2013 , Refereed
  • Photocatalytic isomerization of 1-butene over palladium-loaded titanium(IV) oxide particles: Lewis acid-like features of the photocatalyst, K. Hashimoto, Y. Masuda, H. Kominami, ACS Catal., ACS Catal., 3(6), 1349 - 1355, Jun. 2013 , Refereed
  • Bifunctionality of Rh3+ Modifier on TiO2 and Working Mechanism of Rh3+/TiO2 Photocatalyst under Irradiation of Visible Light, S. Kitano, N. Murakami, T. Ohno, Y. Mitani, Y. Nosaka, H. Asakura, K. Teramura, T. Tanaka, H. Tada, K. Hashimoto, H. Kominami, J. Phys. Chem. C, J. Phys. Chem. C, 117(21), 11008 - 11016, May 30 2013 , Refereed
  • Stoichiometric production of aminobenzenes and ketones by photocatalytic reduction of nitrobenzenes in secondary alcoholic suspension of titanium(IV) oxide under metal-free conditions, K. Imamura, T. Yoshikawa, K. Hashimoto, H. Kominami, Appl. Catal. B, Environ., Appl. Catal. B, Environ., 134-135, 193 - 197, May 02 2013 , Refereed
  • Effects of Copper(II) Oxide Addition and Red Light Irradiation on Photocatalytic Activity of Indium Oxide under Irradiation of Visible Light, Y. Sasaki, A. Tanaka, K. Hashimoto, H. Kominami, Chem. Lett., Chem. Lett., 42(4), 419 - 421, Apr. 05 2013 , Refereed
  • Simultaneous production of aromatic aldehydes and dihydrogen by photocatalytic dehydrogenation of liquid alcohols over metal-loaded titanium(IV) oxide under oxidant- and solvent-free conditions, K. Imamura, H. Tsukahara, K. Hamamichi, N. Seto, K. Hashimoto, H. Kominami, Appl. Catal. A: General, Appl. Catal. A: General, 450, 28 - 33, Jan. 15 2013 , Refereed
  • Preparation of Au/TiO2 with Metal Cocatalysts Exhibiting Strong Surface Plasmon Resonance Effective for Photoinduced Hydrogen Formation under Irradiation of Visible Light, A. Tanaka, S. Sakaguchi, K. Hashimoto, H. Kominami, ACS Catal., ACS Catal., 3(1), 79 - 85, Jan. 2013 , Refereed
  • Photocatalytic reductive dechlorination of chlorobenzene in alkali-free aqueous alcoholic suspension of palladium-loaded titanium(IV) oxide particles in the absence or presence of oxygen, H. Kominami, T. Nishi, K. Fuku, K. Hashimoto, RSC Adv., RSC Adv., 3(17), 6058 - 6064, 2013 , Refereed
  • Photocatalytic reduction of benzonitrile to benzylamine in aqueous suspension of palladium-loaded titanium(IV) oxide, K. Imamura, T. Yoshikawa, K. Nakanishi, K. Hashimoto, H. Kominami, Chem. Commun., Chem. Commun., 49(93), 10911 - 10913, 2013 , Refereed
  • Preparation of Au/CeO2 Exhibiting Strong Surface Plasmon Resonance Effective for Selective or Chemoselective Oxidation of Alcohols to Aldehydes or Ketones in Aqueous Suspensions under Irradiation by Green Light, Tanaka Atsuhiro, Hashimoto Keiji, Kominami Hiroshi, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 134(35), 14526 - 14533, Sep. 05 2012 , Refereed
  • Gold-Titanium(IV) Oxide Plasmonic Photocatalysts Prepared by a Colloid-Photodeposition Method: Correlation Between Physical Properties and Photocatalytic Activities, A. Tanaka, A. Ogino, M. Iwaki, K. Hashimoto, A. Ohnuma, F. Amano, B. Ohtani, H. Kominami, Langmuir, Langmuir, 28(36), 13105 - 13111, Aug. 2012 , Refereed
    Summary:Au nanoparticles were prepared and successfully loaded on TiO2 without change in the original particle size using a method of CPH. The prepared Au nanoparticles supported on TiO2 showed strong photoabsorption at around 550 nm due to SPR of Au and exhibited a photocatalytic activity in mineralization of formic acid in aqueous suspensions under irradiation of visible light. A linear correlation between photocatalytic activity and the amount of Au loaded, that is, the number of Au nanoparticles, was observed, indicating that the activity of Au/TiO2 plasmonic photocatalysts can be controlled simply by the amount of Au loading using the CPH method and that the external surface area of Au nanoparticles is a decisive factor in mineralization of formic acid under visible light irradiation.
  • Photocatalytic hydrogen formation from ammonia and methyl amine in an aqueous suspension of metal-loaded titanium(IV) oxide particles, H. Kominami, H. Nishimune, Y. Ohta, Y. Arakawa, T. Inaba, Applied Catalysis B: Environmental, Applied Catalysis B: Environmental, 111, 297 - 302, Jan. 2012 , Refereed
  • Chemoselective reduction of nitrobenzenes to aminobenzenes having reducible groups by a titanium(IV) oxide photocatalyst under gas- and metal-free conditions, Imamura Kazuya, Hashimoto Keiji, Kominami Hiroshi, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 48(36), 4356 - 4358, 2012 , Refereed
  • Preparation of Au/TiO2 exhibiting strong surface plasmon resonance effective for photoinduced hydrogen formation from organic and inorganic compounds under irradiation of visible light, Tanaka Atsuhiro, Sakaguchi Satoshi, Hashimoto Keiji, Kominami Hiroshi, CATALYSIS SCIENCE & TECHNOLOGY, CATALYSIS SCIENCE & TECHNOLOGY, 2(5), 907 - 909, 2012 , Refereed
  • Photocatalytic reduction of nitrite to dinitrogen in aqueous suspensions of metal-loaded titanium(IV) oxide in the presence of a hole scavenger: an ensemble effect of silver and palladium co-catalysts, Gekko Hitoshi, Hashimoto Keiji, Kominami Hiroshi, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 14(22), 7965 - 7970, 2012 , Refereed
  • Gold and Copper Nanoparticles Supported on Cerium(IV) Oxide-A Photocatalyst Mineralizing Organic Acids under Red Light Irradiation, Tanaka Atsuhiro, Hashimoto Keiji, Kominami Hiroshi, CHEMCATCHEM, CHEMCATCHEM, 3(10), 1619 - 1623, Oct. 2011 , Refereed
  • Photocatalytic mineralization of volatile organic compounds over commercial titanium(IV) oxide modified with rhodium(III) ion under visible light irradiation and correlation between physical properties and photocatalytic activity, Kitano Sho, Hashimoto Keiji, Kominami Hiroshi, CATALYSIS TODAY, CATALYSIS TODAY, 164(1), 404 - 409, Apr. 30 2011 , Refereed
  • Gold nanoparticles supported on cerium(IV) oxide powder for mineralization of organic acids in aqueous suspensions under irradiation of visible light of lambda=530 nm, Kominami Hiroshi, Tanaka Atsuhiro, Hashimoto Keiji, APPLIED CATALYSIS A-GENERAL, APPLIED CATALYSIS A-GENERAL, 397(1-2), 121 - 126, Apr. 30 2011 , Refereed
  • Photocatalytic Mineralization of Acetic Acid in Aqueous Suspension of Metal-loaded Cerium(IV) Oxide under Irradiation of Visible Light, Tanaka Atsuhiro, Hashimoto Keiji, Kominami Hiroshi, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 40(4), 354 - 356, Apr. 05 2011 , Refereed
  • Photocatalytic degradation of 2-propanol over metal-ion-loaded titanium(IV) oxide under visible light irradiation: Effect of physical properties of nano-crystalline titanium(IV) oxide, Kitano Sho, Hashimoto Keiji, Kominami Hiroshi, APPLIED CATALYSIS B-ENVIRONMENTAL, APPLIED CATALYSIS B-ENVIRONMENTAL, 101(3-4), 206 - 211, Jan. 14 2011 , Refereed
  • Photocatalytic reduction of nitrobenzenes to aminobenzenes in aqueous suspensions of titanium(IV) oxide in the presence of hole scavengers under deaerated and aerated conditions, Imamura Kazuya, Iwasaki Shin-ichi, Maeda Tsuyoshi, Hashimoto Keiji, Ohtani Bunsho, Kominami Hiroshi, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 13(11), 5114 - 5119, 2011 , Refereed
  • Stoichiometric formation of benzene and ketones by photocatalytic dechlorination of chlorobenzene in secondary alcohol suspensions of palladium-loaded titanium(IV) oxide powder in the presence of sodium ion sources, Fuku Kojirou, Hashimoto Keiji, Kominami Hiroshi, CATALYSIS SCIENCE & TECHNOLOGY, CATALYSIS SCIENCE & TECHNOLOGY, 1(4), 586 - 592, 2011 , Refereed
  • Selective photocatalytic oxidation of aromatic alcohols to aldehydes in an aqueous suspension of gold nanoparticles supported on cerium(IV) oxide under irradiation of green light, Tanaka Atsuhiro, Hashimoto Keiji, Kominami Hiroshi, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 47(37), 10446 - 10448, 2011 , Refereed
  • Photocatalytic disproportionation of nitrite to dinitrogen and nitrate in an aqueous suspension of metal-loaded titanium(IV) oxide nanoparticles, Kominami Hiroshi, Gekko Hitoshi, Hashimoto Keiji, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 12(47), 15423 - 15427, Dec. 2010 , Refereed
  • Homogeneous photocatalytic mineralization of acetic acid in an aqueous solution of iron ion, Imanishi Masachiyo, Hashimoto Keiji, Kominami Hiroshi, APPLIED CATALYSIS B-ENVIRONMENTAL, APPLIED CATALYSIS B-ENVIRONMENTAL, 97(1-2), 213 - 219, Jun. 09 2010 , Refereed
  • Photocatalytic Degradation of 2-Propanol under Irradiation of Visible Light by Nanocrystalline Titanium(IV) Oxide Modified with Rhodium Ion Using Adsorption Method, Kitano Sho, Hashimoto Keiji, Kominami Hiroshi, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 39(6), 627 - 629, Jun. 05 2010 , Refereed
  • Photocatalytic Homogeneous Oxidation of Organic Compounds in Aqueous Solutions Containing Iron(III) Ion: A Very Simple Method for Mineralization of Organic Pollutants in Water, Imanishi Masachiyo, Hashimoto Keiji, Kominami Hiroshi, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 39(4), 352 - 353, Apr. 05 2010 , Refereed
  • Photocatalytic selective oxidation of methanol to methyl formate in gas phase over titanium(IV) oxide in a flow-type reactor, Kominami Hiroshi, Sugahara Hiroshi, Hashimoto Keiji, CATALYSIS COMMUNICATIONS, CATALYSIS COMMUNICATIONS, 11(5), 426 - 429, Jan. 25 2010 , Refereed
  • Mineralization of organic acids in aqueous suspensions of gold nanoparticles supported on cerium(IV) oxide powder under visible light irradiation, Kominami Hiroshi, Tanaka Atsuhiro, Hashimoto Keiji, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 46(8), 1287 - 1289, 2010 , Refereed
  • Photocatalytic reductive dechlorination of chlorobenzene to benzene in 2-propanol suspension of metal-loaded titanium(IV) oxide nanocrystals in the presence of dissolved sodium hydroxide, Fuku Kojirou, Hashimoto Keiji, Kominami Hiroshi, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 46(28), 5118 - 5120, 2010 , Refereed
  • Rapid and Continuous Saponification of Oils and Fats without Agitation in Silicone Rubber Tube as Reactor: Production and Evaluation of Soaps, Kamiouji Atsushi, Hashimoto Keiji, Kominami Hiroshi, Terada Yukio, Ito Seishiro, JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, 52(5), 288 - 294, Sep. 2009 , Refereed
  • Photo-oxidation of nitrogen oxide over titanium(IV) oxide modified with platinum or rhodium chlorides under irradiation of visible light or UV light, Hashimoto Keiji, Sumida Katutoshi, Kitano Sho, Yamamoto Kazuto, Kondo Nobuaki, Kera Yoshiya, Kominami Hiroshi, CATALYSIS TODAY, CATALYSIS TODAY, 144(1-2), 37 - 41, Jun. 15 2009 , Refereed
  • Rapid Saponification of Fatty Acid Methyl Esters with Aqueous Alkali Hydroxide Solutions Using a Long Narrow Tubular Reactor, KAMIOUJI Atsushi, HASHIMOTO Keiji, KOMINAMI Hiroshi, ITO Seishiro, Topics in Catalysis, Topics in Catalysis, 52(6/7), 795 - 800, Jun. 2009 , Refereed
    Summary:Saponification of various fatty acid methyl esters with an aqueous solution of sodium or potassium hydroxide (NaOH(aq) or KOH(aq)) using a long narrow tubular reactor (TR) was studied at 333 K to elucidate effects of their carbon number on the apparent diffusion constant (k). Saponification by a conventional method, batch-type system (BR), was also studied for comparison with that in the TR. All of the saponification rates obeyed the Nernst diffusion rate equation, and the values of k were determined from their Nernst plots. The values of k in the TR system were more than 500-times larger than those in the BR system.
  • Photocatalytic Reduction of Nitrobenzene to Aniline in an Aqueous Suspension of Titanium(IV) Oxide Particles in the Presence of Oxalic Acid as a Hole Scavenger and Promotive Effect of Dioxygen in the System, Kominami Hiroshi, Iwasaki Shin-ichi, Maeda Tsuyoshi, Imamura Kazuya, Hashimoto Keiji, Kera Yoshiya, Ohtani Bunsho, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 38(5), 410 - 411, May 05 2009 , Refereed
  • Accelerated Saponification of Methyl Dodecanoate with Aqueous Sodium Hydroxide Solution in the Presence of Alcohols in a Silicone Rubber Tube as a Flow-Type Reactor, Kamiouji Atsushi, Hashimoto Keiji, Kominami Hiroshi, Ito Seishiro, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 82(4), 509 - 513, Apr. 15 2009 , Refereed
  • Direct solvothermal formation of nanocrystalline TiO2 on porous SiO2 adsorbent and photocatalytic removal of nitrogen oxides in air over TiO2-SiO2 composites, KOMINAMI Hiroshi, YUKISHITA Kimiyo, KIMURA Takashi, MATSUBARA Moeko, HASHIMOTO Keiji, KERA Yoshiya, OHTANI Bunsho, Topics in Catalysis, Topics in Catalysis, 47(3/4), 155 - 161, Apr. 2008 , Refereed
    Summary:Solvothermal decomposition of titanium(IV) tert-butoxide (TTB) in toluene at 573 K in the presence of silica gel (SiO2) with continuous stirring yielded a titanium(IV) oxide (TiO2)-SiO2 composite in which agglomerates of nanocrystalline TiO2 were deposited on the surfaces of SiO2 particles. Various TiO2-SiO2 composites having different TiO2 contents can be synthesized by changing the ratio of TTB and SiO2, and the composites had large surface areas corresponding to porous properties of SiO2. These TiO2-SiO2 composites were used for photocatalytic removal of nitrogen oxides in air and their photocatalytic performances were compared with those of other TiO2-SiO2 samples prepared by different methods. Solvothermally-synthesized 74wt%TiO2-SiO2 composite exhibited excellent photocatalytic performance (almost stoichiometric removal of NOx (98%) and very low NO2 release (0.3%)) attributable to high photocatalytic activity of TiO2 and high adsorption property of SiO2.
  • Continuous saponification of methyl laurate using long narrow tubes as a reactor, Kamiouji Atsushi, Hashimoto Keiji, Kominami Hiroshi, Ito Seishiro, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 47(5), 1464 - 1467, Mar. 05 2008 , Refereed
  • Preparation of a Visible Light-responding Photocatalyst via Nitrogen Doping to Titanium(IV) Oxide Modified with a Silane Coupling Reagent, KOMINAMI Hiroshi, TAKENOUCHI Kenta, HASHIMOTO Keiji, SAYAMA Kazuhiro, Electrochemistry, Electrochemistry, 76(2), 118 - 120, Feb. 2008 , Refereed
    Summary:A titanium(IV) oxide (TiO2) sample having a large surface area and showing a large visible light absorption was prepared by modification of commercial TiO2 with a silane coupling reagent and subsequent nitrogen doping with ammonia at 500?C. The thus-prepared visible light-responding TiO2 sample was used photoinduced removal of gaseous nitrogen oxides (NOx) under irradiation from blue light-emitting diodes or white fluorescent lamp and exhibited higher level of NOx removal than nitrogen-doped unmodified TiO2. A remarkable improvement in NOx removal was achieved by removing silica species with sodium hydroxide solution presumably due to the large surface area for effective adsorption of NOx and storage of nitric acid, and sufficient efficiency for both visible light and UV light.
  • Visible-light-induced oxidative removal of nitrogen oxides in air by metal chloride-modified titanium(IV) oxide nanoparticles, Kominami Hiroshi, Sumida Katutoshi, Yamamoto Kazuto, Kondo Nobuaki, Hashimoto Keiji, Kera Yoshiya, RESEARCH ON CHEMICAL INTERMEDIATES, RESEARCH ON CHEMICAL INTERMEDIATES, 34(5-7), 587 - 601, 2008 , Refereed
  • Combustion of Toluene over Titanium(IV) Oxide Catalyst, AN Byonggu, KAIDA Sachiko, MIYAKE Tohru, TANI Tohru, KASHIMOTO Itsushi, KOMINAMI Hiroshi, J. Jpn. Petrol. Inst., J. Jpn. Petrol. Inst., 50(5), 283 - 286, Sep. 2007 , Refereed
    Summary:Combustion catalysts free from precious metals, such as platinum, for removal of volatile organic compounds were investigated. Common metal oxides (titanium(IV) oxide (TiO2), alumina and silica) were selected as candidates for a catalyst for combustion of toluene at low concentrations. Complete conversion of toluene was not achieved even at 500?C without catalysts, although the ignition point of toluene is 480?C. TiO2 exhibited the highest activity for combustion of toluene among representative metal oxides. Toluene was almost quantitatively converted to carbon dioxide (>99% yield) over TiO2 under the condition of appropriate contact time at 500?C.
  • Evaluation of electron?hole recombination properties of titanium(IV) oxide particles with high photocatalytic activity, Murakami Shin-Ya, Kominami Hiroshi, Kera Yoshiya, Ikeda Shigeru, Noguchi Hidenori, Uosaki Kohei, Ohtani Bunsho, Res. Chem. Intermed., Res. Chem. Intermed., 33(3-5), 285 - 296, 2007 , Refereed
    Summary:Electron?hole recombination in nano-sized titanium(IV) dioxide (TiO2) particles with various physical properties, which have been shown to be highly active photocatalysts, was evaluated by quantitative analysis of reduced titanium species (Ti3+), which might be formed at crystalline defective sites in TiO2 particles through photo-irradiation in the presence of a hole scavenger under deaerated conditions.
  • Transformations of gaseous methanol over supported and unsupported ruthenium containing polyoxomolybdate catalysts, Oonaka Tomohiro, Takenouchi Kenta, Hashimoto Keiji, Kominami Hiroshi, Kera Yoshiya, Matsubara Yoshio, JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, 50(1), 16 - 22, Jan. 2007 , Refereed
  • Preparation of V2O5/TiO2catalyst for NH3-SCR: Controlling factor of TiO2support for highly active catalyst, A. Satsuma, N. Furuta, T. Ogiso, M. Inoue, H. Kominami, K. Kagawa, T. Hattori, Studies in Surface Science and Catalysis, Studies in Surface Science and Catalysis, 162, 785 - 792, Dec. 01 2006
    Summary:TiO2and TiO2-SiO2prepared by various methods were tested as the support V2O5for NH3-SCR. The intrinsic activity, i.e., reaction rate per active site, was independent of the preparation method and SiO2content, but the densities of active sites and deposited vanadium species were higher on the support with higher density of surface OH groups. It was concluded that the surface reactivity such as OH density is a key factor of TiO2support controlling catalytic activity of V2O5/TiO2catalyst for NH3-SCR. © 2006 Elsevier B.V. All rights reserved.
  • Oxidative dehydrogenation of methanol over a ruthenium-containing polyoxomolybdate supported on metal oxides chemically modified with silane coupling agent, Tomohiro Oonaka, Keiji Hashimoto, Hiroshi Kominami, Yoshiya Kera, Yoshio Matsubara, Catalysis Today, Catalysis Today, 111, 354 - 360, Feb. 2006 , Refereed
    Summary:A salt of ruthenium-containing polyoxomolybdate anion ([Ru2Mo14O50]10-or [Ru2Mo14O52]14-; Ru2Mo14) was synthesized by mixing ruthenium chloride and sodium molybdate in a buffer solution (acetic acid-ammonium acetate) at pH 5. The polyanion, Ru2Mo14, was loaded on a silica carrier chemically modified with a silane coupling agent having a 1,2-diaminoethyl group (DAPS-SiO2). X-ray diffraction, FT-IR and surface area measurements revealed that Ru2Mo14was highly dispersed on DAPS-SiO2up to 20 wt.% loading. The highly dispersed Ru2Mo14exhibited a high level of activity for oxidative dehydrogenation of methanol to formaldehyde with a high selectivity, whereas combustion of methanol occurred on the bulky salt of Ru2Mo14and ruthenium catalyst supported on a SiO2carrier. © 2005 Elsevier B.V. All rights reserved.
  • Selective photocatalytic reduction of nitrate to nitrogen molecules in an aqueous suspension of metal-loaded titanium(IV) oxide particles, Hiroshi Kominami, Takao Nakaseko, Yumiko Shimada, Akitoshi Furusho, Hiroyuki Inoue, Shin Ya Murakami, Yoshiya Kera, Bunsho Ohtani, Chemical Communications, Chemical Communications, 2933 - 2935, Jun. 2005 , Refereed
    Summary:Nitrate was photocatalytically reduced to nitrogen molecules with a high selectivity in a basic aqueous suspension of palladium and copper-loaded titanium(IV) oxide powders in the presence of oxalate anion as a hole scavenger. © The Royal Society of Chemistry 2005.
  • Synthesis of ruthenium-containing polyoxomolybdate and its catalytic features for liquid-phase oxidation using peroxo compounds, Tomohiro Oonaka, Keiji Hashimoto, Hiroshi Kominami, Yoshio Matsubara, Yoshiya Kera, Journal of the Japan Petroleum Institute, Journal of the Japan Petroleum Institute, 48, 178 - 179, May 2005 , Refereed
    Summary:Needle-like crystals of ruthenium-molybdenum polyoxometalate having a composition of Na4(NH4)[RuMo7O25]•8H2O (RuMo7) were synthesized with high reproducibility. With cetylpyridinium cation, RuMo7 was modified and its catalytic features were evaluated using oxidation of cyclohexanol to cyclohexanone with t-butyl hydroperoxide or hydrogen peroxide. RuMo7 exhibited high rate for the reaction, and had high potential for H2O2decomposition.
  • Synthesis of thermally stable χ-alumina by thermal decomposition of aluminum isopropoxide in toluene, Okorn Mekasuwandumrong, Okorn Mekasuwandumrong, Hiroshi Kominami, Piyasan Praserthdam, Masashi Inoue, Journal of the American Ceramic Society, Journal of the American Ceramic Society, 87, 1543 - 1549, Jan. 2004 , Refereed
    Summary:Thermal decomposition of aluminum isopropoxide in toluene at 315°C resulted in χ-alumina that had high thermal stability, whereas the reaction at lower temperatures resulted in formation of an amorphous product. The χ-alumina thus obtained directly transformed to α-alumina at ∼1150°C, bypassing the other transition alumina phases, whereas the amorphous product transformed to α-alumina and then to θ-alumina before final transformation to α-alumina. When the χ-alumina, solvothermally synthesized at 315°C, was recovered by the removal of the solvent at the reaction temperature, thermal stability of the product was improved further. This procedure is convenient because it avoids bothersome work-up processes that yield large-surface-area and large-pore-volume alumin.
  • Preparation of vanadium-based catalysts for selective catalytic reduction of nitrogen oxides using titania supports chemically modified with organosilanes, H. Kominami, M. Itonaga, A. Shinonaga, K. Kagawa, S. Konishi, Y. Kera, Studies in Surface Science and Catalysis, Studies in Surface Science and Catalysis, 143, 1089 - 1096, Dec. 01 2002
    Summary:A titania (TiO2) sample with a large surface area (300 m2g-1) was chemically modified with 3-aminopropyltrimethoxysilane (APS) under a reflux of toluene. The thermal stability of the modified TiO2(APS-TiO2) and the adsorptivity of metavanadate anion (VO3-) on APS-TiO2from an aqueous solution were investigated. Modification with APS suppressed crystal growth and transformation of anatase crystallite to rutile upon calcination, and the anatase phase was preserved even after calcination at 1000°C, while transformation to rutile in the unmodified TiO2samples was observed at around 800°C. Since there was little crystal growth in APS-TiO2, it possessed a large surface area of 205 m2g-1after calcination at 700°C. The amount of VO3-adsorbed on APS-TiO2was ca. 1.5-times larger than that on unmodified TiO2due to a strong affinity caused by acid-base interaction between VO3-and the amino group of APS-TiO2. A supported V2O5catalyst that was prepared by decomposition of a VO3--adsorbing APS-TiO2sample had a large surface area despite the large V2O5loading and exhibited higher activity than that of a catalyst prepared from an unmodified TiO2sample.
  • Chemical modification of metal oxide carrier's surfaces with a silane coupling agent and an application of the method to catalyst preparation, KERA Y, KAMADA M, HANADA Y, KOMINAMI H, Composite Interfaces, Composite Interfaces, 8(2), 109 - 119, Jan. 01 2001
    Summary:Several metal oxides were modified with γ-anilinopropyltrimethoxysilane (AnPS). Variations in the physicochemical properties with the modification were investigated in detail. The adsorptivity of 12-tungstophosphate anion (PW12) was shown to be greatly improved in the carriers such as SiO2, TiO2, and Al2O3, which are porous and have a high surface area, but it was not increased in SnO2and MgO, which have a small surface area and a high isoelectric point. With TiO2-carrier, quantitative studies on the adsorptivity were carried out further, and the interaction modes of PW12 on the AnPS-modified surfaces were discussed based on FT-IR and XPS analyses. The isotherm attained quite steeply to a monomolecular layer of PW12. The FT-IR bands ascribed to the anilino group deformed considerably and the N1s-peak in XPS shifted along with the PW12-adsorption. From the findings it was strongly suggested that PW12 was effectively fixed through an acid-base interaction on the AnPS-TiO2. Catalytic activity of PW12 fixed on AnPS-TiO2for 2-propanol dehydration as a test reaction were examined; in the pretreatment at 300°C the activity was limited to a low level but after the treatment at 450°C it increased in proportion to the PW12-loading on the AnPS-TiO2surfaces. Thus, it was inferred that PW12 was quite regularly dispersed over the modified surface. In conclusion, it is suggested that the modification technique is applicable to the preparation of a metal oxide-supported heteropolyacid catalyst.
  • Novel Synthesis of Thermally Stable, Alumina-modified Titania : Thermal Decomposition of Alkoxides in Organic Solvent, Masaaki KOHNO, Toshimi FURUSHIMA, Hiroshi KOMINAMI, Koji KAGAWA, Yoshiya KERA, NIPPON KAGAKU KAISHI, NIPPON KAGAKU KAISHI, (3), 179 - 182, 2001 , Refereed
  • Thermal Treatment of Titanium Alkoxides in Organic Media : Novel Synthesis Methods for Titanium(IV)Oxide Photocatalyst of Ultra-high Activity, Hiroshi Kominami, Jun Ichi Kato, Shin Ya Murakami, Masaaki Kohno, Yoshiya Kera, Sei Ichi Nishimoto, Masashi Inoue, Tomoyuki Inui, Bunsho Ohtani, Studies Surface Science and Catalysis, Studies Surface Science and Catalysis, 130 B, 1937 - 1942, Jan. 01 2000
    Summary:Thermal treatment of titanium(IV) alkoxide in organic solvent was examined. Titanium tert-butoxide was decomposed in inert organic solvents at 573 K to give microcrystalline anatase titanium(IV) oxide (TiO2) powders with crystallite size of ca. 9 nm and a surface area of >100 m2g-1. Primary and secondary alkoxides of titanium(IV), however, were not decomposed under the similar conditions, indicating that the thermal stability of C-O bonds in the alkoxides was a decisive factor for their decomposition. Reaction of titanium n-butoxide in alcohols yielded microcrystalline TiO2, suggesting that water generated from alcohols hydrolyzed the alkoxide. The as-prepared TiO2powders exhibited much higher rate of carbon dioxide formation than any other active photocatalysts such as Degussa P-25 and Ishihara ST-01 in the photocatalytic mineralization of acetic acid in aerated aqueous solutions. The higher activity of the present TiO2photocatalysts is attributed to their high crystallinity and large surface area. © 2000 Elsevier Science B.V. All rights reserved.
  • Reactions of rare earth acetate hydrates in glycols at high temperatures, INOUE M, NISHIKAWA T, KOMINAMI H, INUI T, Journal of Material Science, Journal of Material Science, 35(6), 1541 - 1547, 2000 , Refereed
  • Synthesis of brookite-type titanium oxide nano-crystals in organic media, KOMINAMI H, KOHNO M, KERA Y, Journal of Material Chemistry, Journal of Material Chemistry, 10(5), 1151 - 1156, 2000 , Refereed
  • Mesoporous electrodes having tight agglomeration of single-phase anatase TiO2 nanocrystallites : Application to dye-sensitized solar cells, KAMBE S, MURAKOSHI K, KITAMURA T, WADA Y, YANAGIDA S, KOMINAMI H, KERA Y, Solar Energy Materials. & Solar Cells, Solar Energy Materials. & Solar Cells, 61(4), 427 - 441, 2000 , Refereed
  • Photocatalytic Oxidation of Nitrogen Monoxide over Titanium(IV)Oxide Nanocrystals of Large Surface Areas, HASHIMOTO K, WASADA K, TOUKAI N, KOMINAMI H, KERA Y, J. Photochemistry and Photobiology A : Chemistry, J. Photochemistry and Photobiology A : Chemistry, 136(1/2), 103 - 109, 2000 , Refereed
  • Synthesis of Titanium(IV)Oxide of Ultra-High Photocatalytic Activity : High-Temperature Hydrolysis of Titanium Alkoxides with Water Liberated Homogeneously from Solvent Alcohols, KOMINAMI H, KATO J, MURAKAMI S, KERA Y, INOUE M, INUI T, OHTANI B, Journal of Molecular Catalysis A-Chemistry, Journal of Molecular Catalysis A-Chemistry, 144(1), 165 - 171, 1999 , Refereed
  • Synthesis of Microcrystalline Hematite and Magnetite in Organic Solvents and Effect of a Small Amount of Water in the Solvents, KOMINAMI H, ONOUE S, MATSUO K, KERA Y, Journal of American Ceramic Society, Journal of American Ceramic Society, 82(7), 1937 - 1940, 1999 , Refereed
  • Formation of Lanthanum Diacetate Hydroxide by Thermal Treatment of Lanthnum Acetylacetonate Dihydrate in an Organic Solvent Containing a Small Amount of Water, Hiroshi KOMINAMI, Sei-ichi ONOUE, Satomi NONAKA, Yoshiya KERA, Journal of Ceramic Society of Japan, Journal of Ceramic Society of Japan, 107(1247), 682 - 685, 1999 , Refereed
  • Hydrolysis of Titanium Alkoxide in Organic Solvent at High Temperatures : A New Synthetic Method for Nano-sized, Thermally Stable Titanium(IV)Oxide, KOMINAMI H, KOHNO M, TAKADA Y, INOUE M, INUI T, KERA Y, Industrial and Engineering Chemistry Research, Industrial and Engineering Chemistry Research, 38(10), 3925 - 3931, 1999 , Refereed
  • Titanium(IV) oxide photocatalyst of ultra-high activity: A new preparation process allowing compatibility of high adsorptivity and low electron-hole recombination probability, Hiroshi Kominami, Shin Y. Murakami, Yoshiya Kera, Bunsho Ohtani, Catalysis Letters, Catalysis Letters, 56, 125 - 129, Dec. 1998 , Refereed
    Summary:Microcrystalline anatase titanium(IV) oxide (TiO2) particles were synthesized by hydrothermal crystallization in organic media (HyCOM) followed by calcination, and used in a photocatalytic reaction system of silver metal deposition. Upon elevating the post-calcination temperature, the photocatalytic activity was enhanced in spite of the simultaneous decrease in amount of surface-adsorbed Ag+. Comparison with the effect of calcination temperature on the other reaction systems revealed that the annealing effect became more significant with increasing number of electrons (or holes) required to complete the photocatalytic reaction process.
  • Novel method for synthesis of well-crystallized vanadyl(2+) hydrogen phosphate hemihydrate: Crystallization in organic media containing a small amount of water, Hiroshi Kominami, Kentarou Matsuo, Yoshiya Kera, Journal of the American Ceramic Society, Journal of the American Ceramic Society, 81, 3035 - 3037, Nov. 1998 , Refereed
    Summary:Vanadyl(2+) hydrogen phosphate hemihydrate (VOHPO4· 0.5H2O, VHP) that had high crystallinity and showed a strong (001) peak in its X-ray diffractometry (XRD) pattern was synthesized via thermal treatment of a mixture of vanadyl(2+) acetylacetonate and triethyl phosphate at 200°C in organic solvents that contained a small amount of water. Scanning electron microscopy observations revealed that the product consisted of thin plates (2-4 μm wide and <0.5 μm thick). When the reaction was conducted at 250°C, a VHP sample was formed that exhibited stronger XRD peaks and had a plate width of >20 μm. The present VHP sample was topotactically transformed to divanadyl(2+) pyrophosphate, which showed a strong (020) XRD peak, via thermal treatment in a nitrogen atmosphere at 500°C.
  • Novel synthesis of microcrystalline titanium(IV) oxide having high thermal stability and ultra-high photocatalytic activity: Thermal decomposition of titanium(IV) alkoxide in organic solvents, Hiroshi Kominami, Jun Ichi Kalo, Yoko Takada, Yoshiaki Doushi, Bunsho Ohtani, Bunsho Ohtani, Sei Ichi Nishimoto, Masashi Inoue, Tomoyuki Inui, Yoshiya Kera, Catalysis Letters, Catalysis Letters, 46, 235 - 240, Dec. 1997 , Refereed
    Summary:Thermal decomposition of titanium(IV) tetra-tert-butoxide (TTB) in inert organic solvents at 573 K yielded microcrystalline anatase (titanium(IV) oxide, TiO2) powders with a crystallite size of ca. 9nm and a surface area of > 100m2 g-1. Primary and secondary alkoxides of titanium(IV), however, were not decomposed under similar conditions, indicating that the thermal stability of C-O bonds in the alkoxides was a decisive factor for their decomposition. The TiO2 prepared from TTB by this manner was thermally stable upon calcination in air and retained high surface area of ca. 100 m2 g-1 even after calcination at 823 K. The as-prepared TiO2 powders, without calcination, exhibited much higher rate of carbon dioxide formation than any other active photocatalysts such as Degussa P-25 and Ishihara ST-01 in the photocatalytic mineralization of acetic acid in aerated aqueous solutions. The higher activity of the present TiO2 photocatalysts is attributed to both high crystallinity and large surface of the present product. The calcination of the as-prepared TiO2 in air reduced the photocatalytic activity, but it was still higher than the other commercially available TiO2's.
  • Intercalation of peroxomolybdate (VI) anion into layered double hydroxide and its reversible transformation to oxomolybdate (VI) anion, Hiroshi Kominami, Satoko Kurimoto, Masahiro Kubota, Ryuji Shiozaki, Yoshiya Kera, Journal of the Ceramic Society of Japan, Journal of the Ceramic Society of Japan, 105, 707 - 709, Jan. 1997 , Refereed
    Summary:Peroxomolybdate (VI) anion with tartrate as a ligand ([Mo2O2(O2)4(C4H2O6)]4-, PMA) was intercalated into layers of Mg-Al type layered double hydroxide (LDH) by anion exchange reaction with terephthalate anion previously intercalated in the layers. The intercalation compounds were characterized by FT-IR, UV, X-ray diffraction and thermal analysis equipped with a mass spectroscope. Both in aqueous solution and in the LDH layers suspended in water, the peroxo groups (-O-O-) in PMA were released at 80°C to yield oxomolybdate (s) having a tartrate ligand, and the oxomolybdate (s) reverted to PMA by addition of hydrogen peroxide.
  • Cerium oxides incorporated into zeolite cavities and their reactivity, Journal of Chemical Society, Faraday Transaction, Journal of Chemical Society, Faraday Transaction, 93(20), 3729 - 3732, 1997 , Refereed
  • Deposition and interaction of phosphododecatungstate on a silica gel surface modified with a silane coupling agent having anilino groups, Masahiko Kamada, Hiroshi Kominami, Yoshiya Kera, Journal of Colloid and Interface Science, Journal of Colloid and Interface Science, 182, 297 - 300, Sep. 1996 , Refereed
    Summary:Silica gel was chemically modified with (3-anilinopropyl)trimethoxysilane (AnPS) under a reflux of toluene (abbreviated as AnPS-SiO2). The adsorptivity of phosphododecatungstate anion (PW12) on AnPS-SiO2from an aqueous solution was investigated quantitatively. The amounts adsorbed rose quite steeply to a coverage (θ) of 0.90 with increasing PW12 concentrations in solution, while they rose gradually to 0.33 on the unmodified SiO2as a reference. It was verified, from the changes in bands due to the anilino group in FT-IR spectra and XP-spectra, that such a strong affinity was caused by acid-base interaction of PW12 with the amino group of AnPS-SiO2.
  • Oxidative dehydrogenation of isobutyric acid on heteropolymolybdophosphoric acid catalyst supported on silica modified with silane coupling agents, Masahiko Kamada, Hiroshi Kominami, Yoshiya Kera, Nippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal, Nippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal, 302, Mar. 1996 , Refereed
    Summary:The oxidative dehydrogenation of isobutyric acid has been investigated using the heteropolymolybdophosphoric acid (HPMo) catalyst supported on the SiO2 modified with (3-anilinopropyl)trimethoxysilane (AnPS) as silane coupling agent. HPMo fixed on the modified SiO2 indicated extremely higher conversion of isobutyric acid and selectivity to methacrylic acid at 250-300°C than the unmodified catalyst.
  • In situ FT-IR Study of Polynuelear Peroxo Complexes Formed in a H2O2-Cerium(IV) Decaturgstate Anion (CeW10O368-) Reacti, Appied Spectroscopy, Appied Spectroscopy, 50(4), 541 - 544, 1996 , Refereed
  • Crystallization and Transforumation of Aluminum Orthophosphates in Organic Solvent Containing a Small Amount of Woter, Journal of American Ceramic Society, Journal of American Ceramic Society, 79(9), 2506 - 2508, 1996 , Refereed
  • Novel synthesis method for thermally stable monoclinic zirconia. Hydrolysis of zirconium alkoxides at high temperatures with a limited amount of water dissolved in inert organic solvent from the gas phase, Masashi Inoue, Hiroshi Kominami, Tomoyuki Inui, Applied Catalysis A, General, Applied Catalysis A, General, 121(1), 1 - 6, Jan. 1995 , Refereed
    Summary:Zirconium alkoxide which was thermally pre-treated in an inert organic solvent was hydrolyzed at 250-300°C with a limited amount of water dissolved in the solvent from the gas phase. This procedure afforded microcrystalline (5.8 nm) monoclinic zirconia which showed a high thermal stability and retained large surface areas of 162 and 76 m2/g even after calcination at 500 and 900°C, respectively. Thermal pre-treatment in the absence of water above 250°C was essential to avoid the formation of the tetragonal form. © 1995 Elsevier Science B.V.
  • Sythesis of Submicron Spherical Crystals of Gadolinium Gallium Garnets by the glycothermal Method, Journal of Materials Science Letters, Journal of Materials Science Letters, 14(18), 1303 - 1305, 1995 , Refereed
  • Synthesis of Large Pore-size and Large pore-volume Aluminas by Glycothermal Treatment of Aluminium Alkoxide and Subsequent Calcination, Journal Materials Science, Journal Materials Science, 29(9), 2459 - 2466, 1994 , Refereed
  • Reduction of Nitrogen Monoxide by Charcoal, Nippon Kagaku Kaishi, Nippon Kagaku Kaishi, (6), 582 - 584, 1994 , Refereed
  • Reaction of aluminium alkoxides with various glycols and the layer structure of their products, Masashi Inoue, Hiroshi Kominami, Tomoyuki Inui, Journal of the Chemical Society, Dalton Transactions, Journal of the Chemical Society, Dalton Transactions, 3331 - 3336, Dec. 1991 , Refereed
    Summary:The reaction of Al(OR)3(R = Prior Bus) with glycols was examined. The XRD patterns and IR spectra of the products suggest that they have the layer structure of boehmite with the glycol moiety incorporated between its layers through covalent bonding. The crystallite size of the product increased in the following order (carbon number of glycol): 2 < 3 < 6 < 4. When butane-1,4-diol was used the crystallite size of the product was the largest. This order suggests that heterolytic cleavage of C-O bonds is the ′ factor controlling the growth of the boehmite structure.
  • SYNTHESIS OF DOUBLE OXIDES HAVING SPINEL STRUCTURE (ZNAL2O4, ZNGA2O4) BY THE GLYCOTHERMAL METHOD, INOUE, M, OTSU, H, KOMINAMI, H, INUI, T, (7), 1036 - 1038, Jul. 1991 , Refereed
  • Synthesis of Yttrium Aluminium Garnet by the Glycothermal Method, INOUE M, OTSU H, KOMINAMI H, INUI T, Journal of the American Ceramic Society, Journal of the American Ceramic Society, 74(6), 1452 - 1454, Jun. 1991 , Refereed
  • Formation of the Glycol Derivative of Boehmite by the Thermal Treatment of Gibbsite in Glycol—Reaction Mechanisms—, Masashi Inoue, Yasuhiko Kondo, Hiroshi Kominami, Hirokazu Tanino, Tomoyuki Inui, Nippon Kagaku Kaishi, Nippon Kagaku Kaishi, 1991, 1339 - 1345, Jan. 1991 , Refereed
    Summary:Reaction of fine-particle gibbsite in glycol under the spontaneous vapor pressure of the glycol (glycothermal treatment) yields a glycol derivative of boehmite (Ref. 5). In this paper, the mechanisms of this reaction were explored. With an increase in the particle size of gibbsite, the yield of the boehmite derivative decreased and the yield of well-crystallized boehmite and the amount of unreacted gibbsite increased (Table 2). Autocatalytic nature was observed during the course of the reaction (Figs. 2 and 3). Addition of a small amount of water facilitated the formation of the glycol derivative of boehmite. A honeycomb like texture composed of plate-like crystals of the boehmite derivative was developed on the exterior of the particle when coarse gibbsite was used, whereas the glycothermal treatment of fine-particle gibbsite yielded bulky aggregates composed of honeycomb-like texture, combining the original particles (Figs. 4~6). These results suggest that aluminum hydroxide was dissolved into a mixture of glycol and water formed by partial dehydration of gibbsite followed by ligand exchange between the water molecule in the coordination site of aluminum and the glycol molecule and then crystallization of the glycol derivative of boehmite. Formation of boehmite was interpreted by the intra-particle hydrothermal reaction originally proposed by de Boer et al. for the formation of boehmite during the thermal dehydration of gibbsite. A chimney-like structure composed of honeycomb-like texture of the glycol derivative of boehmite was found in the product from coarse gibbsite (Fig. 7). This structure may have been formed when closed pore filled with water, where the intraparticle hydro-thermal reaction took place, reached to the surface of the particle and a large amount of water together with aluminum species was released from the pore into the bulk solvent. © 1991, The Chemical Society of Japan. All rights reserved.
  • Formation of La(CH3COO)2(OH) by Glycothermal Treatment of Lanthanum Acetate Sesquihydrate and Its Thermal Decomposition Behavior, Masashi Inoue, Hiroshi Kominami, Hiroyuki Otsu, Tomoyuki Inui, Nippon Kagaku Kaishi, Nippon Kagaku Kaishi, 1991, 1254 - 1260, Jan. 1991 , Refereed
    Summary:Glycothermal treatment of lanthanum acetate sesquihydrate in 1, 4-butanediol at 300 °C was examined and found to afford lanthanum diacetate hydroxide (La(CH3COO)2(OH)), which was confirmed by13C-NMR spectrum (Fig. 5), IR spectrum(Fig. 4), elemental analysis (Table 2), and thermal analysis. The product decomposed into lanthanum oxide according to the following sequence : La(CH3COO)2(OH) La(CH3COO)OLa2(CO3)O2La2O3diacetate hydroxide acetate oxide carbonate oxide oxide This thermal decomposition behavior was similar to that of lanthanum acetate which decomposed as follows : sesquihydrate monohydrateamorphous anhydrous acetate crystalline anhydrous acetateacetate oxidecarbonate oxideoxide Glycothermal reaction completely altered the morphology of the particles; the product was composed of thin plates, while the starting crystals were bulky mass (Fig. 7). These observations indicate that the product is formed via a dissolution-crystallization mechanism, lanthanum acetate being dissolved into a mixture of 1,4-butanediol and water originated from the crystallization water of the sesquihydrate. Thermal decomposition into the acetate oxide preserved the morphology and both samples showed strong orientation in XRD pattern, suggesting that topotactic decompostion took place. © 1991, The Chemical Society of Japan. All rights reserved.
  • Synthesis of Microcrystalline Titania in Organic Media, Masashi Inoue, Hiroshi Kominami, Hiroyuki Otsu, Tomoyuki Inui, Nippon Kagaku Kaishi, Nippon Kagaku Kaishi, 1991, 1364 - 1366, Jan. 1991 , Refereed
    Summary:Reaction of oxobis(2,4-pentanedionato-O, O′) titanium (TiO(acac)2) or titanium isopro-poxide (TIP) in various organic media was examined and found to afford microcrystalline anatase. The product having the smallest crystallite size and the largest surface area was obtained by the reaction of TiO(acac)2in toluene at 250 °C. The product preserved relatively high surface area even after calcination at 550 °C in an air flow. © 1991, The Chemical Society of Japan. All rights reserved.

Books etc

  • Photocatalysis: Science and Technology, 共著,   2002 10

Conference Activities & Talks

  • Photocatalytic properties of metal ion-modified titanium oxide under irradiation of visible light,   2012 12
  • Gold-Titanium(IV) Oxide Plasmonic Photocatalysts Prepared by Newly Developed Colloid-Photodeposition Method: Correlation Between Physical Properties and Photocatalytic Activities, Gold2012,   2012 09 , Gold2012
    Summary:In this study, we examined preparation of Au/TiO2 having a sharp size distribution of Au nanoparticles without agglomeration by using various methods. Here we report preparation of Au/TiO2 with various amounts of Au loading and correlation between the amount of Au, TiO2 properties and photocatalytic activity in mineralization of organic acids under irradiation of visible light.
  • Photocatalytic hydrogen formation using surface plasmon resonance-type photocatalysts under irradiation of visible light,   2012 09
  • Gold nanoparticle-modified cerium(IV) oxide inducing plasmonic selective oxidation of aromatic alcohols under irradiation of visible light, Gold2012,   2012 09 , Gold2012
    Summary:Gold nanoparticles supported on cerium(IV) oxide powder showing strong absorption at around 550 nm due to surface plasmon resonance oxidized aromatic alcohols to corresponding aldehydes almost quantitatively in an aqueous suspension under irradiation of green light.
  • Au/CeO2: A new-type photocatalyst for selective oxidation of aromatic alcohols to aldehydes working under visible light irradiation, IPS-19,   2012 08 , IPS-19
    Summary:we found that a new material, i.e., Au/CeO2, exhibited a much higher level of activity than did other supported Au materials such as Au/TiO2 and Au/silica in photoinduced mineralization of organic acids in an aqueous suspension under irradiation of visible light matching the absorption due to SPR of Au. In this study, we report a new photocatalysis of Au/CeO2, i.e., almost stoichiometric oxidation of benzyl alcohols to benzaldehydes under irradiation of green light from an LED. A linear correlation was observed between the external surface area of Au nanoparticles loaded on CeO2 and the rate of photocatalytic benzaldehyde formation, indicating that the external surface area of Au loaded on CeO2 rather than the amount of Au loaded is an important factor controlling the photocatalytic activity of Au/CeO2 under visible light irradiation.
  • Selective photocatalytic oxidation of aromatic alcohols in aqueous suspension of Rh3+ modified TiO2 under visible light irradiation,   2012 07
  • Selective photocatalytic oxidation of benzyl alcohol in aqueous suspension of palladium ion-modified titanium oxide(IV) under visible light irradiation,   2012 03
    Summary:Selective photocatalytic oxidation of alcohol to aldehyde was performed in aqueous suspension of titanium(IV) oxide (TiO2) modified with palladium ion (Pd2+) under visible light irradiation. In selective oxidation of benzyl alcohol to benzaldehyde as a model reaction, the high yield (96%) was obtained by the use of rutile-type TiO2.
  • Enhancement of activity of tungsten(VI) oxide photocatalyst responding to visible light,   2011 12
  • Selective photocatalytic oxidation of benzyl alcohol to benzaldehyde in aqueous suspension of metal ion-modified TiO2 under visible light irradiation,   2011 11
    Summary:Aldehyde compounds play an important role in the synthesis of drugs, fragrances and flavor, and they are generally synthesized through selective oxidation of alcohols. Titanium(IV) oxide (TiO2) is known as an excellent photocatalyst. Recently, selective oxidation of benzyl alcohols to benzaldehydes in aqueous suspension of TiO2 under UV light irradiation was reported.1 We have previously reported metal ion-modified TiO2 (Mn+/ TiO2) photocatalysts responding to visible light.2 In this study, we carried out selective oxidation of benzyl alcohol to benzaldehyde as a model reaction in aqueous suspension of Mn+/ TiO2 under visible light irradiation.
  • Solvothermal synthesis of tungsten oxide(VI) photocatalyst and combination with adsorption materials,   2011 10
  • The charge transfer in rhodium ion-modified TiO2 photocatalyst responding to visible light,   2011 10
  • Thermo-photocatalytic isomerization of butenes over taitanium(IV) oxide loaded with palladium metal,   2011 09
  • Enhancement of photocatalytic activity of tungsten oxide(VI) by introduction of adsorption materials,   2011 09
  • Photocatalytic selective oxidation of benzylalcohol by metal ion-modified TiO2 photocatalyst under irradiaiton of visible light,   2011 09
  • Surface plasmon resonance property and photocatalysis of silver nanoparticles loaded on metal oxides,   2011 09
  • Photocatalytic Chemoselective Reduction of Nitrobenzenes to Anilines, EuropaCat X,   2011 08 , EuropaCat X
  • ANALYSIS OF PHOTOCATALYTIC PROPERTIES OF RHODIUM ION-MODIFIED TITANIUM(IV) OXIDE,   2011 08
    Summary:Titanium(IV) oxide (TiO2) is known as highly active photocatalyst under irradiation of UV light. However, there was only a small amount of UV light at indoor environment. It is expeted to create photocatalysts responding to visible light. Recently, we eported a new TiO2-based photocatalyst responding to visible light, rhodium ion (Rh3+)-modified TiO2, and the photocatalytic activity of that photocatalyst was dependent on the physical properties of TiO2. In addition, the results that Rh3+ modified on TiO2 is a candidate as an inorganic photosensitizer and a cocatalyst for multi-electron reduction of O2 were observed. In this study, the function of Rh3+ was investigated in detail by electrochemical and photoacoustic spectroscopic (PAS) measurement.
  • Photocatalytic Redox Reaction of Nitro Aromatics and Secondly Alcohols to Amino Aromatics and Ketones in Suspension of Titanium(IV) Oxide, CIMTEC 2010,   2011 06 , CIMTEC 2010
  • Electron transfer properties of rhodium ion-modified titanium(IV) oxide photocatalyst,   2011 06
    Summary:Titanium(IV) oxide (TiO2) photocatalyst has been used for removal of harmful compounds in air and water. However, TiO2 was driven under only UV light irradiation. It is demanded to prepare photocatalysts responding to visible light for indoor application. Recently, we reported that rhodium ion modified TiO2 responded to visible light and showed high photocatalytic activity for decomposition of VOC under visible light irradiation. But, it is not enough to analyze the mechanism of the phohocatalyst. In this work, we investigated the charge transfer in Rh3+-TiO2 and the status of rhodium ion on TiO2 by various measurements.
  • Correlation between some physical properties and activity of photocatalysts in hydrogen formation from biomass,   2011 03
  • Recovery of benzene by photocatalytic dechlorination of chlorobenzene: continuous reaction in pseudo-fixed bed slurry-type reactor,   2011 03
  • Photocatalytic isomerization of butenes over TiO2 loaded with metals,   2011 03
  • Enhancement of activity of co-catalyst-tungsten(VI) oxide photocatalyst responding to visible light,   2011 03
  • Photocatalytic selective oxidation of benzyl alcohol on photocatalyst responding to visible light,   2011 03
  • Preparation of silver nanoparticles loaded on metal oxide and their surface plasmon resonance property,   2011 03
  • Photocatalytic properties of rhodium ion-modified titanium oxide,   2011 01
    Summary:Titanium(IV) oxide (TiO2) photocatalyst has been used for removal of harmful compounds in air and water. However, TiO2 was driven under only UV light irradiation. Thus, synthesis of photocatalyst responding to visible light is attractive. Previously, we have reported that Rhodium chloride fixed TiO2 showed excellent photocatalytic activity for oxidative removal of nitrogen oxide under visible light irradiation. In this work, we modified TiO2 with rhodium ion for responding to visible light, and used for decomposition of VOC. On the other hand, photocatalytic reaction involves various processes such as photoabsorption on TiO2. Photocatalytic activity is the result of a combination of these processes. Thus, controlling the physical properties was equal to controlling the photocatalytic activities. We tried to prepare highly active photocatalyst responding to visible light in this study.
  • Photocatalytic decomposition of VOC by rhodium ion-modified TiO2 photocatalyst responding to visible light,   2010 12
  • Effects of physical properties and characterization of charge transfer in rhodium ion-modified TiO2 photocatalyst under irradiation of visible light,   2010 11
  • Dechlorination of chlorobenzene with pseudo-fixed bed slurry-type flow photocatalytic reactor,   2010 10
  • Photocatalytic selective oxidation of ethanol using flow-type reactor,   2010 09
  • Photocatalytic hydrogen evolution from biomass in aqueous suspension of nickel-loaded titanium(IV) oxide,   2010 09
  • Photocatalytic dechlorination of chlorobenzene with pseudo-fixed bed slurry-type flow reactor,   2010 09
  • Electron transfer in rodium ion-modified TiO2 photocatalyst responding to visible light,   2010 09
  • Photocatalytic activity of rhodium ion-loaded brookite-type titanium(IV) oxide under visible light,   2010 09
  • Selection of Hole Scavenger for Green Photocatalytic Reduction of Nitro Aromatics, TOCAT6,   2010 07 , TOCAT6
  • Metal ion-loaded titanium oxide photocatalysts responding to visible light: Correlation between physical properties and photocatalytic activity,   2010 07
    Summary:Titanium(IV) oxide (TiO2) powder modified with metal ions degraded volatile organic compounds (VOC) under irradiation of visible light. Photocatalytic activity was dependent of physical properties of the TiO2 powders. Rhodium(III) ion-modified TiO2 samples exhibited a remarkable higher photocatalytic activity in mineralization of VOC than cupper(II) ion-modified TiO2 samples. Cupper(II) ion-modified rutile-type TiO2 samples showed higher activity than cupper(II) ion-modified anatase-type TiO2 samples. The absorption of Rh3+/TiO2 samples was proportional to the amount of Rh3+; however, Rh3+/HyCOM-TiO2 samples exhibited the mountain-type tendency in the photocatalytic activity toward the photoabsorption, indicating that excess loading of Rh3+ caused the decrease in photocatalytic activity.
  • Photocatalytic Redox Reaction of Nitro Aromatics and Secondly Alcohols to Amino Aromatics and Ketones in Suspension of Titanium(IV) Oxide, CIMTEC 2010,   2010 06 , CIMTEC 2010
  • Correlation between physical properties and photocatalytic activities of metal ion-titanium oxide responding to visible light,   2010 06
    Summary:It is known that titanium(IV) oxide (TiO2) works as a semiconductor photocatalyst that is able to decompose harmful organic compounds. Since TiO2 only absorbs UV light, TiO2 does not exhibit photocatalytic activity under irradiation of visible light. Therefore, development of a photocatalyst responding to visible light is very important for effective utilization of solar energy. We have reported that TiO2 modified with RhCl3 showed excellent photocatalytic activity for oxidative removal of NOx under irradiation of visible light. In this study, TiO2 samples having various physical properties were prepared using solvothermal method and modified with Cu2+ or Rh3+. Then, correlation between physical properties and photocatalytic activities in degradation of VOC under irradiation of visible light was investigated.
  • Correlation between physical properties and activity of photocatalysts in hydrogen formation from biomass,   2010 03
  • Characterization and improvement of metal ion-titanium oxide photocatalysts responding to visible light,   2010 03
    Summary:Titanium(IV) oxide (TiO2) powder having various physical properties and modified with metal ions degraded volatile organic compounds under visible light irradiation. Especially, TiO2 powder modified with rhodium(III) ion exhibited a remarkable high photocatalytic activity. In this study, the Rh3+-TiO2 samples were characterized and the physical properties of TiO2 were optimized. The optimized Rh3+-TiO2 sample showed higher photocatalytic activities than available visible-light-responding photocatalysts under irradiation of vis and UV-vis light.
  • Effects of physical properties on performances of metal ion-titanium oxide photocatalysts responding to visible light,   2009 12
  • Photocatalytic Reduction of Nitrobenzene In Water-Nitrobenzene Biphasic Suspending System, The 12th Japan-Korea Symposim on Catalysis,   2009 10 , The 12th Japan-Korea Symposim on Catalysis
  • Photocatalytic degradation of VOC on metal ion-modified TiO2 under irradiation of visible light,   2009 10
  • Photocatalytic reaction by rhodium ion-modified metal oxides under irradiation of visible light,   2009 09
  • PHOTOCATALYTIC REDUCTION OF NITRO AROMATICS TO AMINO AROMATICS IN AQUEOUS SUSPENSIONS OF TITANIUM(IV) OXIDE PARTICLES IN THE PRESENCE OF OXALIC ACID, XXIV International Conference on Photochemistry,   2009 07 , XXIV International Conference on Photochemistry
    Summary:We applied photocatalytic reduction of NB to aniline (AN) for synthesis of various amino aromatics, for example, p-nitroaniline (p-NAN) to p-phenylendiamine (p-PDA) and m-nitrobenzene sulfonic acid (m-NBS) to m-aminobenzen sulfonic acid (m-ABS). We also reported effects of O2 on photocatalytic reduction of those nitro aromatics.
  • Visible-light induced photocatalytic reaction by titanium(IV) oxide with metal ions,   2009 03
    Summary:Titanium(IV) oxide powders were modified with metal ions and were used for Photo- catalytic decomposition of volatile organic compounds under visible light irradiation. Photo- catalytic activity was dependent of physical properties of the titanium(IV) oxide powders. Especially, titanium(IV) oxide powders modified with rhodium(III) ion exhibited excellent photocatalytic activity.
  • Effects of Reaction Conditions on Photocatalytic Reduction of Nitro Aromatics, ICC 14 Pre-Symposium,   2008 07 , ICC 14 Pre-Symposium
  • Control of reaction selectivity of of electron and its apllication to photocatalytic reduction of nitro compounds,   2003 12

Misc

  • Techniques in electrochemical measurement - Photocatalytic reaction: Operation, characterization and evaluation, Bunsho Ohtani, Hiroshi Kominami, Electrochemistry, 66, 1098, 1110,   1998 12 01 , https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=11544360360&origin=inward
  • Techniques in electrochemical measurements preparation of photocatalysts, Hiroshi Kominami, Bunsho Ohtani, Electrochemistry, 66, 996, 1003,   1998 12 01 , https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=11544315210&origin=inward
  • Preparation of photocatalysts, Hiroshi Kominami, Bunsho Ohtani, Denki Kagaku, 66, 996, 1003,   1998 12 01 , https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0002954582&origin=inward

Research Grants & Projects

  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Synthesis of photocatalyst materials utilizing localized surface plasmon resonance of metal nanoparticles, Many efforts have been devoted to synthesis of photocatalysts that respond to visible light. This study explored new application of surface plasmon resonance (SPR) of gold (Au) nanoparticles as plasmonic photocatalysts working under irradiation of visible light. The plasmonic photocatalysts exhibited unique photoabsorption properties and photocatalytic performances in the minerarization of organic acid, selective oxidation, H2 formation, and reduction of organic compounds under irradiation of visible light. The functionalized SPR photocatalysts with platinum, silver and palladium co-catalysts worked effectively in H2 formation, reduction of nitrobenzene and dechlorination of chlorobenzene, respectively. The results introduced in this study can be widely applied for design and development of new plasmonic photocatalysts exhibiting further excellent activities and selectivities.
  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Thermo-photocatalytic materials and reactions, Catalytic materials exhibiting photocatalysis and thermocatalysis were prepared and used for some reactions. Photocatalytic oxidation of methanol in air over titanium(IV) oxide at room temperature yielded methyl formate with a high level of selectivity (91 mol%), indicating that photocatalytic oxidation and acid-base-catalyzed dimerization occurred simultaneously. Rapid isomerization of 1-butene to 2-butenes over Pd/TiO_2 was observed under irradiation of UV light, suggesting that thermocatalysis of Pd was accelerated by photogenerated electrons and holes.
  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Control of selectivity and reduction depth of substrate in photocatalytic reduction systems and application to reductive detoxication of nitrate in an aqueous solution, Photocatalytic reduction of nitrate to nitrogen in the presence of various hole scavengers was investigated. At first, effect of pH of the suspension on reduction of nitrate in aqueous suspension of cupper-loaded titanium oxide particles was examined in the presence of oxalate. The reduction product at low pH was ammonia while nitrite was main product at high pH. When photocatalytic reaction was carried out at pH 12 using palladium loaded titanium oxide particles, nitrate was reduced to nitrogen. Optimum amounts of Cu and Pd were determined to be 0.5 wt% and 1.0 wt%, respectively. The reaction rate gradually decreased with prolonging reaction time, indicating that carbonate formed from oxalate suppressed the adsorption of substrate(s). When carbonate was removed from the suspension by pH swing, the original reaction rate was obtained.