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Elucidation of reaction mechanism of modification on titania nanoparticle surface using its photocatalytic reaction(Fostering Joint International Research)

Research Project

Project/Area Number 16KK0110
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research)

Allocation TypeMulti-year Fund
Research Field Functional solid state chemistry
Research InstitutionShinshu University

Principal Investigator

Nishikiori Hiromasa  信州大学, 学術研究院工学系, 教授 (00332677)

Project Period (FY) 2017 – 2019
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Keywords光触媒 / 光化学 / 酸化チタン / 色素 / 分子プローブ / 過渡分光法 / 水酸基生成 / プロトン移動 / 過渡吸収 / 光物性
Outline of Final Research Achievements

A xanthene dye, fluorescein, as a in situ probe molecule was deposited from a solution onto a titania surface in order to probe acid-base equilibrium of hydroxyl groups on the titania surface and clarify the mechanism of surface modification by photocatalytic reaction on the titania itself. Transient absorption spectroscopy using a femtosecond pulse laser revealed the transformation from the monoanion to the dianion via the excited states, i.e., photoinduced proton transfer from the fluorescein to the titania surface. The UV irradiation increases the basic hydroxyl groups on the titania surface, which accepts protons from the water molecules or proton donors on the surface and has a positive charge. These processes promoted the reaction for the surface modification of the titania with very small particles or thin layers of silica, etc.

Academic Significance and Societal Importance of the Research Achievements

酸化チタンナノ粒子に照射する光子量を変化させ、表面水酸基の生成密度を調整することで、活性点濃度の制御を行うことができる。これを利用すると、ナノ粒子表面にサブナノレベルで制御した吸着剤や助触媒等の超微粒子を生成が可能になり、高機能、高性能な光触媒の創製につながる。この精密な制御のためには、超微粒子の形成過程を明らかにすることが重要である。酸化チタンナノ粒子表面に分子プローブとして色素分子を吸着させ、フェムト秒過渡分光測定を行うという間接的な測定手法を開発し、これにより微小な挙動を高感度に観測することに成功した。結果として、超微粒子の光誘起生成過程解明という学術的にインパクトの大きい成果を得た。

Report

(2 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (19 results)

All 2020 2019 2018

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Int'l Joint Research] ジョージア工科大学レーザーダイナミクス研究所(米国)2019

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ジョージア工科大学レーザーダイナミクス研究所(米国)2018

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Observation of Photoinduced Proton Transfer between the Titania Surface and Dye Molecule2020

    • Author(s)
      Nishikiori Hiromasa、Kondo Hayato、Kageshima Yosuke、Hooshmand Nasrin、Panikkanvalappil Sajanlal R.、Valverde-Chavez David A.、Silva Carlos、El-Sayed Mostafa A.、Teshima Katsuya
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 124 Issue: 7 Pages: 4172-4178

    • DOI

      10.1021/acs.jpcc.9b11633

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Water retentivity of allophane-titania nanocomposite films2020

    • Author(s)
      Nishikiori Hiromasa、Watanabe Mizuki、Nakase Miku、Kikuchi Ayaka、Yamakami Tomohiko、Teshima Katsuya
    • Journal Title

      Applied Catalysis B: Environmental

      Volume: 266 Pages: 118659-118659

    • DOI

      10.1016/j.apcatb.2020.118659

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Formation of CuO on TiO2 Surface Using its Photocatalytic Activity2019

    • Author(s)
      Nishikiori Hiromasa、Harata Naoya、Yamaguchi Saho、Ishikawa Takashi、Kondo Hayato、Kikuchi Ayaka、Yamakami Tomohiko、Teshima Katsuya
    • Journal Title

      Catalysts

      Volume: 9 Issue: 4 Pages: 383-383

    • DOI

      10.3390/catal9040383

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Performance of Photofuel Cells Effectively Using Cellulose Film2019

    • Author(s)
      Nishikiori Hiromasa、Takizawa Yuki、Teshima Katsuya
    • Journal Title

      Chemistry Letters

      Volume: 48 Issue: 5 Pages: 437-440

    • DOI

      10.1246/cl.190016

    • NAID

      130007642541

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electrochemical Evaluation for Multiple Functions of Pt loaded TiO2 Nanoparticles Deposited on a Photocathode2019

    • Author(s)
      Yosuke Kageshima, Takumi Fujita, Fumiaki Takagi, Tsutomu Minegishi, Katsuya Teshima, Kazunari Domen, Yutaka Amao, Hiromasa Nishikiori
    • Journal Title

      ChemElectroChem

      Volume: 6 Issue: 18 Pages: 4859-4866

    • DOI

      10.1002/celc.201901453

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] チタニアナノシートと半導体光触媒粉末の複合体からなる半透明光アノードの作製2020

    • Author(s)
      百瀬悠、影島洋介、手嶋勝弥、堂免一成、錦織広昌
    • Organizer
      第125回触媒討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 液相中セルロースの電気化学的酸化分解と燃料電池への展開2020

    • Author(s)
      影島洋介、尾嶋由梨奈、手嶋勝弥、錦織広昌
    • Organizer
      第125回触媒討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] BaTaO2N粉末光アノード表面へのCo/TiO2修飾の検討2020

    • Author(s)
      田口鈴菜、影島洋介、手嶋勝弥、堂免一成、錦織広昌
    • Organizer
      第125回触媒討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Multiple Functions of the Pt-Deposited TiO2 Nanoparticles Layer Formed onto the Photocathode2019

    • Author(s)
      Yosuke Kageshima, Takumi Fujita, Katsuya Teshima, Kazunari Domen, Hiromasa Nishikiori
    • Organizer
      The 17th Korea - Japan Symposium on Catalysis
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Photofuel Cells Using Porous Titania Anodes2019

    • Author(s)
      Hiromasa Nishikiori
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spectroscopic Study for Fluorescein Adsorbed on TiO2 Surface by Surface-Enhanced Infrared Absorption Spectroscopy2019

    • Author(s)
      Hayato Kondo, Yosuke Kageshima, Katsuya Teshima, Hiromasa Nishikiori
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effective Utilization of Cellulose Thin Film Deposited on Porous TiO2 Photoanode in a Photofuel Cell2019

    • Author(s)
      Takumi Yoshimura, Yosuke Kageshima, Katsuya Teshima, Hiromasa Nishikiori
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 光触媒能を利用したチタニアのシリカアルミナ修飾2019

    • Author(s)
      錦織広昌、野口 翔、松永紳吾
    • Organizer
      日本ゾル-ゲル学会第17回討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 光カソード表面へのPt/TiO2ナノ粒子層修飾による水素生成用反応場の構築2019

    • Author(s)
      影島洋介、藤田 匠、 手嶋勝弥、 堂免一成、 錦織広昌
    • Organizer
      第124回触媒討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] BaTaO2N光アノード表面への活性点構築2019

    • Author(s)
      田口鈴菜、影島洋介、錦織広昌
    • Organizer
      第50回中部化学関係学協会支部連合秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] TNS層間へのSiO2修飾による二次迷路構造の構築2019

    • Author(s)
      小林克矢、影島洋介、錦織広昌
    • Organizer
      第50回中部化学関係学協会支部連合秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 色素とチタニア間における光誘起プロトン移動2019

    • Author(s)
      錦織広昌、近藤隼斗、影島洋介、Carlos Silva、Mostafa A. El-Sayed
    • Organizer
      第38回固体・表面光化学討論会
    • Related Report
      2019 Annual Research Report

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Published: 2017-03-15   Modified: 2021-02-19  

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