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Anhydrous solid-gas-phase photocatalytic reaction - development of an innovative process for carbon dioxide recycles

Research Project

Project/Area Number 19K15665
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionHokkaido University

Principal Investigator

Takashima Mai  北海道大学, 触媒科学研究所, 助教 (10772345)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords光触媒 / 二酸化炭素資源化 / 多電子移動反応 / 銀化合物 / 光触媒反応 / 二酸化炭素 / 一酸化炭素 / 光強度依存性
Outline of Research at the Start

新規光触媒反応サイクルを基盤として,二酸化炭素資源化反応を実用化するためのブレークスルーになりうる無水固気相型化学反応を開発する.実用化に向けた最適な生成物として一酸化炭素を対象とし,従来広く用いられてきた水の酸化を伴う二酸化炭素の還元ではなく,水を含まない無水反応系において二酸化炭素から一酸化炭素を生成させることを目的として,金属酸化物光触媒上に担持させた酸化銀/炭酸銀/金属銀の暗反応/光触媒反応サイクルを導入し,高強度の光照射下での光触媒反応段階において,炭酸銀を不均等分解して一酸化炭素を発生させる化学プロセスを開拓する.さらに,固気相フロー式連続反応装置を試作し,実用化への展開をはかる.

Outline of Final Research Achievements

In this study, I aimed to develop an "anhydrous solid-gas-phase" chemical process that could be a breakthrough for the practical application of carbon dioxide recycles. I have focused on silver(I) oxide as a mediator that reacts with gaseous carbon dioxide, have tried to demonstrate “silver(I) oxide-silver carbonate-silver metal-silver oxide” cycle. However, the “silver carbonate to silver metal” process, which is the most important cycle, was not realized.

Academic Significance and Societal Importance of the Research Achievements

提案にした銀化合物サイクルの実現は叶わなかったが,多電子移動反応では照射光強度により反応メカニズムが変化すること,また,十分に入射光子が担保されればこれまで反応が進行しないと思われていた反応でも進行することがわかったことは非常に重要な知見であり,この知見は太陽光を用いた人工光合成技術をはじめとするエネルギー問題解決技術の一端をになう可能性があると考えている.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (14 results)

All 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (4 results)

  • [Journal Article] Light intensity-dependence studies on the role of surface deposits for titania-photocatalyzed oxygen evolution: Are they really cocatalysts?2020

    • Author(s)
      Ketwong, P.; Yoshihara, S.; Takeuchi, S.; Takashima, M.*; Ohtani, B.
    • Journal Title

      J. Chem. Phys.

      Volume: 153 Issue: 12 Pages: 124709-124709

    • DOI

      10.1063/5.0014913

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Light Intensity Dependence of Photocatalytic Activity over Bismuth Tungstate Particles2021

    • Author(s)
      Li Wang, Mai Takashima, Bunsho Ohtani
    • Organizer
      第40回光がかかわる触媒化学シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Studies on multielectron oxygen reduction mechanism of platinum-loaded tungsten(VI)-oxide photocatalysts based on light intensity-dependence analysis2021

    • Author(s)
      Mai Takashima, Chiharu Yamada, Bunsho Ohtani
    • Organizer
      International Solar Fuels Conference 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Light Intensity-dependence Study on Photocatalytic Reaction by Bismuth Tungstate Particles2021

    • Author(s)
      Li Wang, Mai Takashima, Bunsho Ohtani
    • Organizer
      化学系学協会北海道支部2022年冬季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Light-intensity and Action-spectrum Analysis of Tungusten(VI)-oxide Photocatalysis2021

    • Author(s)
      ZHU, Xuezhi・TAKASHIMA, Mai・OHTANI, Bunsho
    • Organizer
      化学系学協会北海道支部2021年冬季研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 光触媒反応速度の光強度依存性解析にもとづく反応機構の解明-ディジタルキネティクス創出の試み2020

    • Author(s)
      高島舞・大谷文章
    • Organizer
      第39回光がかかわる触媒化学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 多電子移動光触媒反応の速度論的解析-「有効粒子体積」導入の試み2020

    • Author(s)
      TAKASHIMA, Mai・KETWONG, Pradudnet・TAKEUCHI, Shugo・YOSHIHARA, Shun・OHTANI, Bunsho
    • Organizer
      第39回固体・表面光化学討論会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of a Precise Method for Light-intensity Dependence of Photocatalytic Reaction Rates2020

    • Author(s)
      KETWONG Pradudnet, ZHU Xuezhi, TAKASHIMA Mai, OHTANI Bunsho
    • Organizer
      化学系学協会北海道支部2020年冬季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Photocatalysis and digital kinetics2019

    • Author(s)
      Takashima Mai
    • Organizer
      Seminar at Maejo University
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 光触媒反応と光強度依存性2019

    • Author(s)
      高島舞
    • Organizer
      第35回ライラックセミナー・第25回若手研究者交流会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Book] Materials Science in Photocatalysis2021

    • Author(s)
      Mai Takashima, Bunsho Ohtani
    • Total Pages
      686
    • Publisher
      Elsevier
    • ISBN
      9780128218594
    • Related Report
      2021 Annual Research Report
  • [Book] Material Sciences in Photocatalysis2021

    • Author(s)
      Takashima, M.; Ohtani, B.,
    • Total Pages
      562
    • Publisher
      Elsevier
    • Related Report
      2020 Research-status Report
  • [Book] Materials Science in Photocatalysis2020

    • Author(s)
      Mai Takashima, Bunsho Ohtani
    • Publisher
      Elsevier
    • Related Report
      2019 Research-status Report
  • [Book] 光触媒が一番わかる2019

    • Author(s)
      高島 舞 大谷 文章
    • Total Pages
      176
    • Publisher
      技術評論社
    • ISBN
      4297106175
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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