• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Unveiling mechanism of photocatalytic water splitting at water/photocatalyst interfaces

Research Project

Project/Area Number 16H06029
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Physical chemistry
Research InstitutionInstitute for Molecular Science (2018)
Kyoto University (2016-2017)

Principal Investigator

Sugimoto Toshiki  分子科学研究所, 物質分子科学研究領域, 准教授 (00630782)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥26,390,000 (Direct Cost: ¥20,300,000、Indirect Cost: ¥6,090,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥19,760,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥4,560,000)
Keywords水分解光触媒 / 光誘起電荷ダイナミクス / 2次元水素結合系 / 赤外拡散反射分光 / 過渡吸収分光 / 酸化反応制御 / 実用表面科学 / 擬似液体水形成 / オペランド振動分光 / 和周波発生分光 / 表面・界面物理化学 / 表面吸着水 / 拡散反射分光 / 二次元振動分光 / 二次元分光 / 二次元赤外分光
Outline of Final Research Achievements

In this project, we have performed infrared transient and steady-state absorption spectroscopy of anatase TiO2 nanoparticles as a function of the number of water adsorbate layers. These absorption measurements in water vapor atmosphere have an advantage over those in liquid water because the number of water layers at the interface can be controlled by relative humidity. We showed that water adsorbates strongly interacting with substrate serve as effective hole traps, but the trapping ability is reduced by hydrogen bonding with other water molecules in the second layer. In addition, we have investigated the hole decay characteristics and photocatalytic activity of BiVO4 with single-particle transient absorption microscopy and found that grain boundaries in aggregated particles do not work as recombination centers but play an important role in elongation of carrier lifetime and thus in enhancing the reactivity of photocatalyst through trap-detrap processes.

Academic Significance and Societal Importance of the Research Achievements

本研究では,精密に圧力を制御した水蒸気雰囲気下で光触媒表面近傍のみを擬似的に水中環境下におくことができ,水溶液中では本来測定が不可能な振動分光を可能にした.さらに,反応と無関係な情報を含むスペクトル信号の中から反応活性ファクター(反応に寄与する表面構造・電子状態,水の水素構造に関する成分)を有効に抽出することによって光触媒/水界面における反応活性増大メカニズムの分子論的基礎を確立することができた.これにより,既存のバンドエンジニアリングで想定されている限界を超えた高量子効率を誇る光触媒の創製につながり,人工光合成分野の飛躍的発展が期待される.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (33 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results) Presentation (21 results) (of which Int'l Joint Research: 11 results,  Invited: 8 results) Remarks (3 results)

  • [Int'l Joint Research] Universita di Milano Bicocca(Italy)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] Universita di Milano Bicocca(Italy)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Topologically disordered mesophase at the topmost surface layer of crystalline ice between 120 and 200 K2019

    • Author(s)
      T. Sugimoto, Y. Otsuki, T. Ishiyama, A. Morita, K. Watanabe, and Y. Matsumoto
    • Journal Title

      Physical Review B

      Volume: 99 Issue: 12 Pages: 121402-121402

    • DOI

      10.1103/physrevb.99.121402

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 水分子凝集系における水素原子の位置に敏感な和周波発生(SFG)振動分光法2019

    • Author(s)
      杉本敏樹
    • Journal Title

      エレクトロニクスコミュニケーション誌

      Volume: 34 Pages: 19-24

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Sum-frequency generation spectroscopy of heteroepitaxial ice films: Unveiling orientation of water molecules, and structural and physical properties of ice2018

    • Author(s)
      Toshiki Sugimoto
    • Journal Title

      J. Spectrosc. Soc. Jpn.

      Volume: 67 Pages: 189-196

    • Related Report
      2018 Annual Research Report
  • [Journal Article] ; Water-assisted hole trapping at highly curved surface of nano-TiO2 photocatalyst2018

    • Author(s)
      K. Shirai, G. Fazio, *T. Sugimoto, D. Selli, L. Ferraro, K. Watanabe, M. Haruta, B. Ohtani, H. Kurata, C. Di Valentin & Y. Matsumoto
    • Journal Title

      J. Am. Chem. Soc

      Volume: 140 Issue: 4 Pages: 1415-1422

    • DOI

      10.1021/jacs.7b11061

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Origins of emergent high-Tc ferroelectric ordering in heteroepitaxial ice film: Sum-frequency generation spectroscopy of H2O and D2O ice films on Pt(111)2018

    • Author(s)
      N. Aiga, *T. Sugimoto, Y. Otsuki, K. Watanabe & Y. Matsumoto
    • Journal Title

      Phys. Rev. B

      Volume: 97 Issue: 7 Pages: 075410-075410

    • DOI

      10.1103/physrevb.97.075410

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Particle size dependence of carrier dynamics and reactivity of photocatalyst BiVO4 probed with single-particle transient absorption microscopy2017

    • Author(s)
      M. Yabuta, A. Takeda, T. Sugimoto, K. Watanabe, A. Kudo & Y. Matsumoto
    • Journal Title

      J. Phyc. Chem. C.

      Volume: 121 Issue: 40 Pages: 22060-22066

    • DOI

      10.1021/acs.jpcc.7b06230

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inelastic electron tunneling mediated by a molecular quantum rotator2017

    • Author(s)
      Sugimoto Toshiki、Kunisada Yuji、Fukutani Katsuyuki
    • Journal Title

      Physical Review B

      Volume: 96 Issue: 24 Pages: 241409-241409

    • DOI

      10.1103/physrevb.96.241409

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] Proton ordering in heteroepitaxial ice films, IMS symposium “Water at interfaces2019

    • Author(s)
      Toshiki Sugimoto
    • Organizer
      IMS symposium “Water at interfaces
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 水分子の向きが揃った特殊な結晶氷の生成2019

    • Author(s)
      杉本敏樹
    • Organizer
      第119回分子科学フォーラム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Water-assisted hale trapping at the highly curved surface of nano photocatalyst2018

    • Author(s)
      Toshiki Sugimoto,
    • Organizer
      FHI-JST Joint Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Toward understanding reactive surface species in photocatalytic water splitting2018

    • Author(s)
      Toshiki Sugimoto
    • Organizer
      The 2nd IMS-NANOTEC Joint Research Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effects of Interface on Orientational Ordering of Heteroepitaxially Grown Ice Film2018

    • Author(s)
      Toshiki Sugimoto
    • Organizer
      The AVS Pacific Rim Symposium on Surfaces
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 赤外分光・和周波発生分光による水分子凝集系の表面・界面における創発物性と反応活性に関する研究2018

    • Author(s)
      杉本敏樹
    • Organizer
      日本分光学会年次大会(2018)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 固体表面の対称性の破れに誘起される水分子凝集系の配向秩序と電荷移動ダイナミクス2018

    • Author(s)
      杉本敏樹
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] レーザー非線形分光法が拓く固体表面吸着水の創発機能研究2018

    • Author(s)
      杉本敏樹
    • Organizer
      第3回 科学技術交流財団「マイクロ固体フォトニクス」研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 和周波発生振動分光による氷の強誘電性の基板依存性2018

    • Author(s)
      相賀則宏, 杉本敏樹, 渡邊一也, 松本吉泰
    • Organizer
      第12回分子科学討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] MoS2ナノシートにおける光腐食反応の印加電位依存性2018

    • Author(s)
      小林柚子,渡邊和也,杉本敏樹,松本吉泰
    • Organizer
      第12回分子科学討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 二次元物質によるアルカリ単原子層プラズモン応答の変調2018

    • Author(s)
      吉田 龍矢, 田中駿介, 渡邊一也, 杉本敏樹, 松本吉泰
    • Organizer
      第12回分子科学討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Rh(111)上に作製した氷薄膜のヘテロダイン検出和周波発生振動分光2018

    • Author(s)
      大槻 友志, 杉本敏樹, 渡邊一也, 松本吉泰
    • Organizer
      2018年日本表面真空学会学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Emergent high-Tc Ferroelectric Ordering of Strongly Correlated and Frustrated Protons in Crystalline-Ice films2017

    • Author(s)
      Toshiki Sugimoto
    • Organizer
      Symposium on Molecular Science of Ice
    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of methane pressure on photocatalytic water-steam reforming reaction by d0 semiconductor metal oxides2017

    • Author(s)
      Toshiki Sugimoto, Kotaro Takeyasu, Taisuke Higashi, Kenji Fujiwara, Akira Yamamoto, Hisao Yoshida, Kazuya Watanabe, and Yoshiyasu Matsumoto
    • Organizer
      The 8th International Symposium on Surface Science
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pressure dependence in photocatalytic non-oxidative coupling of methane on d0 semiconducting metal oxides2017

    • Author(s)
      K. Takeyasu, T. Sugimoto, T. Higashi, N. Mochizuki, K. Fujiwara, A. Yamamoto, H. Yoshida, K. Watanabe and Y. Matsumoto
    • Organizer
      The 8th International Symposium on Surface Science
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inelastic Electron Tunneling Mediated by Molecular Quantum Rotator2017

    • Author(s)
      K. Takeyasu, T. Sugimoto, T. Higashi, N. Mochizuki, K. Fujiwara, A. Yamamoto, H. Yoshida, K. Watanabe and Y. Matsumoto
    • Organizer
      5th Ito international Research Center conference (IIRC5)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] iO2光触媒の電荷ダイナミクスに直接関与する表面吸着水の分光2017

    • Author(s)
      杉本敏樹
    • Organizer
      2017年真空・表面科学合同講演会
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ga2O3光触媒による水蒸気下メタン改質反応: 反応活性・選択性のメタン圧力依存性2017

    • Author(s)
      東泰佑・杉本敏樹・武安光太郎・伊東洋二・山本旭・吉田寿雄・渡邊一也・松本吉泰
    • Organizer
      日本化学会第98春季年会(2018)
    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
  • [Presentation] Pressure dependence in photocatalytic non-oxidative coupling of methane on d0 semiconducting metal oxides2017

    • Author(s)
      K. Takeyasu, T. Sugimoto, T. Higashi, N. Mochizuki, K. Fujiwara, A. Yamamoto, H. Yoshida, K. Watanabe and Y. Matsumoto
    • Organizer
      The 8th International Symposium on Surface Science (ISSS-8)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of methane pressure on photocatalytic water-steam reforming reaction by d0 semiconductor metal oxides2017

    • Author(s)
      Toshiki Sugimoto, Kotaro Takeyasu, Taisuke Higashi, Kenji Fujiwara, Akira Yamamoto, Hisao Yoshida, Kazuya Watanabe, and Yoshiyasu Matsumoto
    • Organizer
      The 8th International Symposium on Surface Science (ISSS-8)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] TiO2光触媒の電荷ダイナミクスに直接関与する表面吸着水の分光2017

    • Author(s)
      杉本敏樹
    • Organizer
      01,2017年真空・表面科学合同講演会
    • Related Report
      2016 Annual Research Report
  • [Remarks] 杉本グループHP

    • URL

      https://groups.ims.ac.jp/organization/sugimoto_g/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 分子科学研究所 杉本グループHP

    • URL

      https://www.ims.ac.jp/research/group/sugimoto/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 京都大学大学院理学研究科化学専攻

    • URL

      http://www.kuchem.kyoto-u.ac.jp/organization/member/toshiki.html

    • Related Report
      2017 Annual Research Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi