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Energy-resolved distribution of electron traps in photocatalyst particles as a siginificant parameter for their photocatalytic activities

Research Project

Project/Area Number 26620187
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Inorganic industrial materials
Research InstitutionHokkaido University

Principal Investigator

Ohtani Bunsho  北海道大学, 触媒科学研究所, 教授 (80176924)

Co-Investigator(Kenkyū-buntansha) TAKASE Mai  室蘭工業大学, 大学院工学研究科, 准教授 (20631972)
Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords電子トラップのエネルギー分布 / 酸化チタン / 光触媒 / 金属酸化物粒子の指紋 / 電子トラップ / 逆二重励起光音響分光法 / 光触媒粒子 / 電子トラップ密度 / エネルギー分布 / 伝導帯下端
Outline of Final Research Achievements

It is revealed that identification of metal-oxide powders is enabled by energy-resolved distribution of electron traps (ERDT) measured using newly developed reversed double-beam photoacoustic spectroscopy. The ERDT patterns and conduction-band bottom (CBB) positions, measured by ordinary photoacoustic spectroscopy, for more than 20 titanium(IV) oxide (titania) powders were different depending on the kind of sample. Degrees of coincidence (dC) of ERDT/CBB were evaluated for a given pair of samples as a product of coincidence of (a) ERDT-pattern matching, (b) total ET density and (c) CBB position. Samples with different code names showed low dC except for pairs of samples prepared in the same way but coded differently. Furthermore, it was shown that the higher the dC, the higher the degree of coincidence of photocatalytic activity of titania samples, i.e., photocatalytic activity of titania samples may be governed by ERDT/CBB.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (12 results)

All 2016 2015 2014

All Journal Article (1 results) Presentation (10 results) (of which Int'l Joint Research: 3 results,  Invited: 5 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] 光触媒はどこまでわかったか2014

    • Author(s)
      大谷文章
    • Journal Title

      触媒

      Volume: 56 Pages: 70-74

    • Related Report
      2014 Research-status Report
  • [Presentation] A finger print of titania and the other metal oxide powders--Energy-resolved distribution of electron traps2016

    • Author(s)
      Ohtani, B.; Nitta, A.; Takase, M.; Takashima, M.; Murakami, N.
    • Organizer
      2016 EMN Meeting on Titanium-Oxides
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2016-03-28
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Energy-resolved Distribution of Electron Traps as the Key Issue for Photocatalysis2015

    • Author(s)
      Ohtani, B.; Nitta, A.; Takase, M,
    • Organizer
      EMN Meeting on Photocatalysis
    • Place of Presentation
      Las Vegas, USA
    • Year and Date
      2015-11-21
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Energy-Resolved Measurement of Electron Traps in Metal-Oxide Particulate Photocatalysts By Newly Developed Reversed Double-Beam Photoacoustic Spectroscopy2015

    • Author(s)
      Ohtani, B.; Nitta, A.; Takase, M.
    • Organizer
      227th Meeting of the Electrochemical Society
    • Place of Presentation
      Chicago, USA
    • Year and Date
      2015-05-24
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 二重励起光音響分光法による酸化チタン粒子中の電子トラップ密度の解析2014

    • Author(s)
      大谷文章・新田明央・高瀬舞
    • Organizer
      表面・界面スペクトロスコピー2014
    • Place of Presentation
      修学院セミナーハウス(京都府京都市)
    • Year and Date
      2014-12-05 – 2014-12-06
    • Related Report
      2014 Research-status Report
  • [Presentation] Electron Traps in Metal Oxide Particulate Photocatalysts as a Key Parameter Governing Their Photocatalytic Activities2014

    • Author(s)
      Ohtani, B.; Takase, M.; Nitta, A.
    • Organizer
      The 19th International Conference on Semiconductors Photocatalysis and Solar Energy Conversion (SPASEC-19)
    • Place of Presentation
      San Diego, USA
    • Year and Date
      2014-11-16 – 2014-11-20
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] 逆二重励起光音響分光法による酸化チタン(IV)光触媒中の電子トラップ密度のエネルギー分解測定2014

    • Author(s)
      新田明央・高瀬舞・大谷文章
    • Organizer
      2014年光化学討論会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Year and Date
      2014-10-11 – 2014-10-13
    • Related Report
      2014 Research-status Report
  • [Presentation] 逆二重励起光音響分光法による酸化チタン(IV)粉末中の電子トラップ密度のエネルギー分布の評価2014

    • Author(s)
      新田明央・高瀬舞・大谷文章
    • Organizer
      第75回応用物理学会秋季学術講演会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Year and Date
      2014-09-17 – 2014-09-20
    • Related Report
      2014 Research-status Report
  • [Presentation] Electron Traps in Metal Oxide Particulate Photocatalysts as a Possible Key for Understanding and Explaining Their Photocatalytic Activities2014

    • Author(s)
      Ohtani, B.; Takase, M.; Nitta, A.
    • Organizer
      The 20th International Conference on Photochemical Energy Conversion and Storage (IPS-20)
    • Place of Presentation
      Berlin, Germany
    • Year and Date
      2014-07-27 – 2014-08-01
    • Related Report
      2014 Research-status Report
  • [Presentation] 光触媒活性支配因子としての電子トラップの密度分布解析2014

    • Author(s)
      大谷文章・新田明央・高瀬舞
    • Organizer
      第33回光がかかわる触媒化学シンポジウム
    • Place of Presentation
      東京大学(東京都目黒区)
    • Year and Date
      2014-07-18
    • Related Report
      2014 Research-status Report
  • [Presentation] 光触媒活性支配因子としての電子トラップ密度の解析2014

    • Author(s)
      大谷文章・高瀬舞・新田明央
    • Organizer
      第14回光触媒研究討論会
    • Place of Presentation
      東京大学(東京都目黒区)
    • Year and Date
      2014-07-08
    • Related Report
      2014 Research-status Report
    • Invited
  • [Patent(Industrial Property Rights)] 光音響分光方法および光音響分光装置2014

    • Inventor(s)
      大谷文章・高瀬舞・新田明央・黒田靖
    • Industrial Property Rights Holder
      国立大学法人北海道大学・昭和電工
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2014-100295
    • Filing Date
      2014-05-14
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2017-05-10  

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