Design and development of photocatalysts of high activity and highly efficient photocatalytic reaction systems based on the understanding of photocatalytic reaction mechanisms

• Project/Area Number: 17029001
• Research Category: Grant-in-Aid for Scientific Research on Priority Areas
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Hokkaido University
• Principal Investigator: OHTANI Bunsho Hokkaido University, Catalysis Research Center, Professor (80176924)
• Project Period (FY): 2001 – 2006
• Project Status: Completed (Fiscal Year 2006)
• Budget Amount: ¥9,800,000 (Direct Cost: ¥9,800,000); Fiscal Year 2006: ¥4,900,000 (Direct Cost: ¥4,900,000); Fiscal Year 2005: ¥4,900,000 (Direct Cost: ¥4,900,000)
• Keywords: photocatalytic reaction / action spectrum / photoabsorption / decahedral particles / anatase-rutile mixture / decoloration of dyes / 金属微粒子 / 酸化分解 / 光音響スペクトル

Research Abstract

1. Action spectrum analyses: It was revealed that this is one of the best methods for the evaluation of photocatalysts and photocatalytic reaction by showing that methylene blue, a frequently employed photocatalytic reaction substrate, is decomposed through photosensitizing mechanism as well as photocatalytic reaction. Moreover, pseudo action spectra taken by using optical cut-off filters show different shape compared from true action spectra.
2. Preparation of highly active titania photocatalyst through novel gas phase reaction: High temperature as-phase synthesis of metal oxide particles is favorable since crystallization of particles is promoted without aggregation to give larger particles. In this study, new type of titania preparation method enabling rapid heating-rapid cooling of titanium(IV) chloride was developed. The resulting anatase small crystallites were of decahedral shape exposing two kinds of lattice facet, 101 and 001 and showed high photocatalytic activity in several reaction systems. The preparation conditions were optimized.
3. Isolation of anatase and rutile crystallites from Degussa P25: From Degussa P25, a representative commercial titania powder with anatase and rutile mixed crystallites, anatase and rutile crystallites were isolated through newly developed method. The isolated samples were used for making calibration curves of each crystal phase to obtain, for the first time, exact composition of P25 and for reconstruction of P25 from two kinds of isolated pure crystallites and commercial amorphous titania. Comparison of physical properties and photocatalytic activities between original and reconstructed samples revealed that there seems to be no synergetic effects by mixing anatase and rutile on the photocatalytic activity.

Research Products

• [Journal Article] In-situ observation of photocatalytic reaction by photoacousticspectroscopy : Detection of heat of exothermic photocatalytic reaction (2008)
  • Author(s): N. Murakami
  • Journal Title: Chem. Phys. Lett. 416 Pages: 316-320
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Participation of Molecular Oxygen in Photocatalytic Oxidative Decomposition of Organic Compounds by Metal Oxide Particulate Suspensions and Thin Film Electrodes (2008)
  • Author(s): B. Ohtani
  • Journal Title: Electrochemistry 76 Pages: 147-149
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Action spectrum analyses of photoinduced superhydrophilicity of titania thin films on glass plates, (2008). (2008)
  • Author(s): X. Yan
  • Journal Title: Thin Solid Films (印刷中)
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] In-situ observation of photocatalytic reaction by photoacoustic spectroscopy : Detection of heat of exothermic photocatalytic reaction (2008)
  • Author(s): Murakami, N., Abe, R., Ohtani, B.
  • Journal Title: Chem. Phys. Lett 416 Pages: 316-320
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Participation of Molecular Oxygen in Photocatalytic Oxidative Decomposition of Organic Compounds by Metal Oxide Particulate Suspensions and Thin Film Electrodes (2008)
  • Author(s): Ohtani, B., Nohara, Y., Abe, R.
  • Journal Title: Electrochemistry 76 Pages: 147-149
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Thin Solid Films (2008)
  • Author(s): Yan, X., Abe, R., Ohno, T., Toyofuku, M., Ohtani, B.
  • Journal Title: (in press)
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Double-Beam Photoacoustic Spectroscopic Studies on Transient Absorption of Titanium(IV) Oxide Photocatalyst Powders (2007)
  • Author(s): N. Murakami
  • Journal Title: J. Phys. Chem. C 111 Pages: 11927-11935
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Isolation of Anatase Crystallites from Anatase-Rutile Mixed Particles by Dissolution with Hydrogen Peroxide and Ammonia (2007)
  • Author(s): B. Ohtani
  • Journal Title: Trans. Mater. Res. Soc. Jpn. 32 Pages: 401-404
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photocatalytic syntheses of azoxybenzene by visible light irradiation ofsilica-coated cadmium sulfide nanocomposites (2007)
  • Author(s): B. Pal
  • Journal Title: Chem. Commun. Pages: 483-485
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Evaluation of electron-hole recombination properties of titanium(IV)oxide particles with high photocatalytic activity (2007)
  • Author(s): S. Murakami
  • Journal Title: Res. Chem. Interm. 33 Pages: 285-296
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Double-Beam Photoacoustic Spectroscopic Studies on Transient Absorption of Titanium(IV) Oxide Photocatalyst Powders (2007)
  • Author(s): Murakami, N., Prieto-Mahaney, O. O., Abe, R., Torimoto, T., Ohtani, B. *
  • Journal Title: J. Phys. Chem. C 111 Pages: 11927-11935
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Isolation of Anatase Crystallites from Anatase-Rutile Mixed Particles by Dissolution with Hydrogen Peroxide and Ammonia (2007)
  • Author(s): Ohtani, B. *, Azuma, Y., Li, D., Ihara, T., Abe, R.
  • Journal Title: Trans. Mater. Res. Soc 32 Pages: 401-404
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photocatalytic syntheses of azoxybenzene by visible light irradiation of silica-coated cadmium sulfide nanocomposites (2007)
  • Author(s): Pal, B., Torimoto, T. *, Okazaki, K., Ohtani, B.
  • Journal Title: Chem. Commun. Pages: 483-485
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Evaluation of electron-hole recombination properties of titanium(IV) oxide particles with high photocatalytic activity (2007)
  • Author(s): Murakami, S. -y. J Kominami, H. *, Kera, Y., Ikeda, S., Noguchi, H., Uosaki, K., Ohtani, B.
  • Journal Title: Res. Cheat. Interm. 33 Pages: 285-296
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Evaluation of electron-hole recombination properties of titanium (IV) oxide particles with high photocatalytic activity (2007)
  • Author(s): Murakami, S.-i., kominami, H., Kera, Y., Ikeda, S., Noguchi, H., Uosaki, K., Ohtani, B.
  • Journal Title: Res. Chem. Interm. 33 Pages: 285-296
• [Journal Article] Photoacoustic spectroscopic estimation of electron mobility in titanium (IV) oxide photocatalysts (2007)
  • Author(s): Murakami, N., Abe, R., Priet Mahaney, O.P., Torimoto, T., Ohtani, B.
  • Journal Title: Stud. Surf. Sci. Catal. (in press)
• [Journal Article] Is methylene blue an appropriate substrate for a photocatalytic activity test? A study with visible-light responsive titania (2006)
  • Author(s): X. Yan
  • Journal Title: Chem. Phys. Lett. 429 Pages: 606-610
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Electric-Field-Induced Changes in Absorption and Emision Spectra of CdS Nanoparticles Doped in a Polymer Film (2006)
  • Author(s): Y. Ohara
  • Journal Title: J. Phys. Chem. B 110 Pages: 20927-20936
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photoacoustic spectroscopic analysis of photo induced change in absorption of titanium(IV)oxide photocatalyst powders : A novel feasible technique for measurement of defect density (2006)
  • Author(s): N. Murakami
  • Journal Title: Chem. Phys. Lett. 426 Pages: 204-208
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photo-switching behavior of CdS nanoparticles doped in a polymer film (2006)
  • Author(s): Y. Ohara
  • Journal Title: Compt. Rend. Chim. 9 Pages: 742-749
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Is methylene bluean appropriate substrate for a photocatalytic activity test? A study with visible-light responsive titania (2006)
  • Author(s): Yan, X., Ohno, T., Nishijima, K., Abe, R., Ohtani, B. *
  • Journal Title: Chem. Phys. Lett. 429 Pages: 606-610
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Electric-Field-Induced Changes in Absorption and Emision Spectra of CdS Nanoparticles Doped in a Polymer Film (2006)
  • Author(s): Oliara, Y., Nakabayashi, T., Iwasaki, K., Torimoto, T., Ohtani, B., Hiratani, T., Konishi, K., Ohta, N. *
  • Journal Title: J. Phys. Chem. B 110 Pages: 20927-20936
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photoacoustic spectroscopic analysis of photoinduced change-in absorption of titanium(IV) oxide photocatalyst powders : A novel feasible technique for measurement of defect densitv (2006)
  • Author(s): Murakami, N., Prieto-Mahaney, 0. O., Toriinoto, T., Ohtani, B. *
  • Journal Title: Chem. Phys. Lett. 426 Pages: 204-208
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photo-switching behavior of CdS nanoparticles doped in a polymer film (2006)
  • Author(s): Ohara, Y., Nakabayashi, T., Iwasaki, K., Torimoto, T., Ohtani, B., Ohta, N. *
  • Journal Title: Compt. Rend. Chim. 9 Pages: 742-749
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Is methylene blue an appropriate substrate for a photocatalytic activity test? A study with visible-light responsive titania (2006)
  • Author(s): Yan, X., Ohno, T., Nishijima, K., Abe, R., Ohtani, B.
  • Journal Title: Chem. Phys. Lett. 429 Pages: 606-610
• [Journal Article] Photochemical Fine-Tuning of Luminescent Color of Cadmium Selenide Nanoparticles : Fabricating a Single-Source Multi-Color Luminophore (2006)
  • Author(s): Torimoto, T., Murakami, S.-y., Sakuraoka, M., Iwasaki, K., Okazaki, K-i., Shibayama, T., Ohtani, B.
  • Journal Title: J. Phys. Chem. B 110 Pages: 13314-13318
• [Journal Article] Photoacoustic spectroscopic analysis of photoinduced change in absorption of titanium (IV) oxide photocatalyst powders : A novel feasible technique for measurement of defect density (2006)
  • Author(s): Murakami, N., Prieto Mahaney, O.P., Torimoto, T., Ohtani, B.
  • Journal Title: Chem. Phys. Lett. 426 Pages: 204-208
• [Journal Article] Photo-switching behavior of CdS nanoparticles doped in a polymer film (2006)
  • Author(s): Y.Ohara
  • Journal Title: Compt.Rend.Chim in press
• [Journal Article] Evaluation of electron-hole recombination properties of titanium(IV) oxide particles with high photocatalytic activity (2006)
  • Author(s): S.-i.Murakami
  • Journal Title: Res.Chem.Interm in press
• [Journal Article] Photocatalytic Preparation of Encapsulated Gold Nanoparticles by Jingle-Bell-Shaped Cadmium Sulfide-Silica Nanoparticles (2005)
  • Author(s): B. Pal
  • Journal Title: Top. Catal. 35 Pages: 321-325
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Selective Photocatalytic Reduction of Nitrate to Nitrogen Molecules in an Aqueous Suspension of Metal-loaded Titanium(IV)Oxide Particles (2005)
  • Author(s): H. Kominami
  • Journal Title: Chem. Commun. Pages: 2933-2935
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Synthesis of Metal-Cadmium Sulfide Nanocomposites Using Jingle-Bell-Shaped Core-Shell Photocatalyst Particles (2005)
  • Author(s): B. Pal
  • Journal Title: J. Appl. Electrochem. 35 Pages: 751-756
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photocatalytic Preparation of Encapsulated Gold Nanoparticles by Jingle-Bell-Shaped Cadmium Sulfide-Silica Nanoparticles (2005)
  • Author(s): Pal, B., Torimoto, T., Ikeda, S., Shibayama, T., Sugawara, K., Takahashi, H., Ohtani, B. *
  • Journal Title: Top. Catal. 35 Pages: 321-325
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Selective Photocatalytic Reduction of Nitrate to Nitrogen Molecules in an Aqueous Suspension of Metal-loaded Titanium(IV) Oxide Particl es (2005)
  • Author(s): Kominami, H. *, Nakaseko, T., Shimada, Y., Furusho, A., Inoue, H., Murakami, S. -y., Kera, Y., Ohtani, B.
  • Journal Title: Chem. Comaun. Pages: 2933-2935
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Synthesis of Metal-Cadmium Sulfide Nanocomposites Using Jingle-Bell-Shaped Core-Shell Photocatalyst Particles (2005)
  • Author(s): Pal, B., Torimoto, T., Iwasaki, K., Shibayama, T., Takahashi, H., Ohtani, B. *
  • Journal Title: J. Appl. Electrochem. 35 Pages: 751-756
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Synthesis of Metal-Cadmium Sulfide Nanocomposites Using Jingle-Bell-Shaped Core-Shell Photocatalyst Particles (2005)
  • Author(s): B.Pal
  • Journal Title: J.Appl.Electrochem 35 Pages: 751-756
• [Journal Article] Photocatalytic Preparation of Encapsulated Gold Nanoparticles by Jingle-Bell Shaped Cadmium Sulfide-Silica Nanoparticles (2005)
  • Author(s): B.Pal
  • Journal Title: Top.Catal 35 Pages: 321-325
• [Journal Article] Selective Photocatalytic Reduction of Nitrate to Nitrogen Molecules in an Aqueous Suspension of Metal-loaded Titanium(IV) Oxide Particles (2005)
  • Author(s): H.Kominami
  • Journal Title: Chem.Commun Pages: 2933-2935
• [Journal Article] Light Intensity Dependence of the Action Spectra of Photocatalytic Reactions with Anatase Titanium(IV)Oxide (2004)
  • Author(s): T. Torimoto
  • Journal Title: Chem. Phys. Lett. 392 Pages: 220-224
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Light Intensity Dependence of the Action Spectra of Photocatalytic Reactions with Anatase Titanium(IV) Oxide (2004)
  • Author(s): Torimoto, T., Aburakawa, Y., Kawahara, Y., Ikeda, S., Ohtani, B. *
  • Journal Title: Chem. Phys. Lett 392 Pages: 220-224
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Solvothermal Syntheses of Semiconductor Photocatalysts of Ultra-high Activities (2003)
  • Author(s): H. Kominami
  • Journal Title: Catal. Today 84 Pages: 181-189
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photochemical Hydrogen Evolution from Aqueous Triethanolamine Solutions Sensitized by Binaphthol-Modified Titanium(IV) Oxide under Visible Light Irradiation (2003)
  • Author(s): S. Ikeda
  • Journal Title: J. Photochem. Photobiol. A : Chem. 160 Pages: 61-67
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Development of a novel photocatalytic reaction system for oxidative decomposition of volatile organic compounds in water with enhanced aeration (2003)
  • Author(s): R. Villacres
  • Journal Title: J. Photochem. Photobiol. A : Chem. 160 Pages: 121-126
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Photocatalytic Decolorization and Mineralization of Malachite Green in An Aqueous Suspension of Titanium(IV)Oxide Nano-particles under Aerated Conditions : Correlation between Some Physical Properties and Their Photocatalytic Activity (2003)
  • Author(s): H. Kominami
  • Journal Title: J. Photochem. Photobiol. A : Chem. 160 Pages: 99-104
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Solvothermal Syntheses of Semiconductor Photocatalysts of Ultra-high Activities (2003)
  • Author(s): Koininaini, H.*, Kato, J. -i., Murakami, S. -y., Ishii, Y., Kohno, M., Yabutani, K. -i., Yamamoto, T., Kera, Y., Inoue, M., Inui, T., Ohtani, B.
  • Journal Title: Catal. Today 84 Pages: 181-189
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photochemical Hydrogen Evolution from Aqueous Triethanolamine Solutions Sensitized by Binaphthol-Modified Titanium(IV) Oxide under Visible Light Irradiation (2003)
  • Author(s): Ikeda, S. l Abe, C., Torimoto, T., Ohtani, B. *
  • Journal Title: J. Photochem. Photobiol A : Chem. 160 Pages: 61-67
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Development of a novel photocatalytic reaction system for oxidative decomposition of volatile organic compounds in water with enhanced aeration (2003)
  • Author(s): Villacres, R., Ikeda, S., Torimoto, T., Ohtani, B. *
  • Journal Title: J. Photochem. Photobiol. A : Cheat. 160 Pages: 121-126
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Photocatalytic Decolorization and Mineralization of Malachite Green in An Aqueous Suspension of Titanium(GV) Oxide Nano-particles under Aerated Conditions : Correlation between Some Physical Properties and Their Photocatalytic Activity (2003)
  • Author(s): Kominami, H. *, Kumamoto, H., Kera, Y., Ohtani, B.
  • Journal Title: J. Photochem. Photobiol A : Chem. 160 Pages: 99-104
  • Description: 「研究成果報告書概要(欧文)」より
• [Presentation] Evaluation and control of crystal defects in titania photocatalysts (2007)
  • Author(s): B. Ohtani, T. Majima
  • Organizer: Fifth Tokyo Conference on Advanced Catalytic Science and Technology (T0CAT5)
  • Place of Presentation: 東京
  • Year and Date: 2007-07-28
  • Description: 「研究成果報告書概要(和文)」より
• [Presentation] valuation and control of crystal defects in titania photocatalysts (2007)
  • Author(s): Ohtani, Bunsho, Takuya, Majima
  • Organizer: Fifth Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT5)
  • Place of Presentation: Tokyo
  • Year and Date: 2007-07-28
  • Description: 「研究成果報告書概要(欧文)」より
• [Book] 『光と界面がおりなす新しい化学の世界』講演収録集 (2008)
  • Author(s): 大谷文章
  • Publisher: クバプロ
  • Description: 「研究成果報告書概要(和文)」より
• [Remarks] 「研究成果報告書概要(和文)」より
  • URL: http://peat.cat.hokudai.ac.jp/cgi-bin/publication/db_publication_e.cgi