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Highly efficient water solar splitting by Z-scheme

Research Project

Project/Area Number 15K05602
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Energy-related chemistry
Research InstitutionPrefectural University of Hiroshima (2016-2019)
Aichi University of Technology (2015)

Principal Investigator

Ohtake Toshihito  県立広島大学, 生物資源科学部, 教授 (30437355)

Project Period (FY) 2015-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords太陽光水分解 / 半導体電極 / 二段階励起機構 / 表面修飾 / Semiconductor Electrode / Silicon / Hydrogen Termination / Oxidization / In-Situ ATR-FTIR / 機能表面 / シリコン / 4-シアノフェノール / エーロゾルOT / 単分子膜 / 光電気化学 / 機能材料
Outline of Final Research Achievements

Application of semiconductor particles has been noticed to solve energy problems as photocatalysis for O2 evolution in water splitting etc. We have tried fabrication of semiconductor electrode toward O2 evolution in water splitting. The electrode obtained high photooxidation properties of water as preventing effective recombination between electrons and holes by utilizing fine semiconductor. Particularly, it is found that immobilization onto the semiconductor surface is able to obtain the remarked properties.

Academic Significance and Societal Importance of the Research Achievements

光エネルギー変換は、その効率の低さが最大の課題である。その中でも水素製造の分野では光触媒を用いた研究が盛んに行われているが、変換効率が低いために実用化へは程遠いのが現状である。最近の取り組みでは植物の光合成に倣った二段階励起機構による光触媒研究が盛んであり、今後もその進展が期待されている。本研究では同じく二段階励起機構を利用した高効率化を狙っているが、光触媒微粉末を水に分散させた系ではなくて、電極を使ったシステムであることが大きな特徴である。これにより、光電気化学系におけるzスキーム型電極の取り組みは、太陽光水分解の研究領域において今後に大きな影響を与える。

Report

(6 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (6 results)

All 2019 2017 2015

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

  • [Journal Article] In Situ Imposing Bias ATR-FTIR Observation at Hydrogen Terminated Si(111) Electrode Surface-Modified with Adsorbed Monolayer2019

    • Author(s)
      Ohtake Toshihito and Iijima Ken-ichiro
    • Journal Title

      Journal of Surface Engineered Materials and Advanced Technology

      Volume: 9 Pages: 29-37

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Surface oxide protection of Si(111) in solution by the surfactant molecules2017

    • Author(s)
      Toshihito Ohtake and Ken-ichiro Iijima
    • Journal Title

      Journal of Surface Engineered Materials and Advanced Technology

      Volume: 7 Issue: 04 Pages: 61-68

    • DOI

      10.4236/jsemat.2017.74006

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hydrogen generation by solar water splitting2017

    • Author(s)
      Toshihito Ohtake
    • Journal Title

      Journal of Life and Environmental Science

      Volume: 9 Pages: 64-65

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Development of methyl, ester and carbonyl terminated n-Si(111) electrode for photo-electrochemical cell2015

    • Author(s)
      Toshihito Ohtake and Ken-ichiro Iijima
    • Journal Title

      Proceedings of First International Conference on Science Engineering & Environment

      Volume: 1 Pages: 231-235

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Observation of adsorbed surfactant molecules and organic molecules on hydrogen terminated Si(111) surface by in-situ ATR-FTIR2017

    • Author(s)
      Toshihito Ohtake and Ken-ichiro Iijima
    • Organizer
      2017 International Conference on Artificial Photosynthesis
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      2017-03-02
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of methyl, ester and carbonyl terminated n-Si(111) electrode for photo-electrochemical cell2015

    • Author(s)
      Toshihito Ohtake and Ken-ichiro Iijima
    • Organizer
      First International Conference on Science Engineering & Environment (SEE-Mie2015)
    • Place of Presentation
      Mie, Japan
    • Year and Date
      2015-11-19
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2022-01-27  

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