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Construction of new catalyst preparation method using solution plasma and rational design of artificial photosynthetic catalyst

Research Project

Project/Area Number 21K18856
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 27:Chemical engineering and related fields
Research InstitutionOsaka Metropolitan University (2022)
Osaka City University (2021)

Principal Investigator

Yoshida Tomoko  大阪公立大学, 人工光合成研究センター, 教授 (90283415)

Co-Investigator(Kenkyū-buntansha) 山本 宗昭  大阪公立大学, 人工光合成研究センター, 特任助教 (50823712)
Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords液中プラズマ法 / 二酸化炭素還元 / 光触媒 / 金属ナノ粒子合成 / 液中プラズマ放電 / 銀クラスター・ナノ粒子 / in-situ 発光・光吸収測定 / 触媒調製法 / プラズマ
Outline of Research at the Start

プラズマ工学と触媒化学のユニークな融合により,液中プラズマ法を応用した独創的な触媒調製法を構築する.触媒反応に適した清浄表面を持つ金属ナノ粒子助触媒を高速合成し,そのサイズと形状,析出分布を制御する.この金属ナノ粒子助触媒を酸化ガリウムなどに安定化させた光触媒を用いて,人工光合成を進行させる.またFT-IR,XAFS,XPSなどの複合分光分析によって,反応中の助触媒の原子構造や化学・電子状態と,光触媒への反応分子吸着挙動や反応中間体をその場観察・評価する.最終的には,助触媒として使用する金属の種類,サイズ・形状,析出状態と,触媒活性との関連性を明らかにし,高機能光触媒の合理的設計指針を示す.

Outline of Final Research Achievements

Silver nanoparticles (Ag NPs) were synthesized by a solution plasma method in an aqueous solution. Optical emission spectra of the plasma revealed that Ag NPs are fabricated with the sputtering of Ag rods as electrode. In-situ optical absorption measurements of the solution during the discharge, which controlled the size of Ag NPs. The synthesized Ag NPs were loaded on gallium oxide, and the sample was used for photocatalytic CO2 reduction with water
Although the photocatalytic reaction proceeded over the sample to produce CO, the CO production rates decreased with the reaction time. Measurements of DR UV-vis spectra and TEM images revealed that a part of the Ag NPs aggregated to become larger particles during the photocatalytic reaction, which would be related to the decrease of the photocatalytic activity.

Academic Significance and Societal Importance of the Research Achievements

液中で生成するプラズマの特性を活かした独創的且つ新しい触媒調製法を構築し,助触媒の高度設計手法へと,世界に先駆けて展開を図るというチャレンジを行っている.
(意義1)金属ナノ粒子合成法としての挑戦・特色は,ナノ粒子の凝集抑制のために従来使用された分散剤や配位子を利用しないことであり,触媒反応に適した清浄表面を持つナノ粒子助触媒を合成する点にある.(意義2)XAFS, FT-IR, 光吸収測定などの複合分析によって,助触媒の原子構造や化学・電子状態を評価することにより,「光触媒活性・反応メカニズムに及ぼす金属ナノ粒子担持効果」について単純明快な議論を展開する.

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (21 results)

All 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (11 results) (of which Int'l Joint Research: 9 results,  Invited: 4 results) Book (3 results)

  • [Journal Article] Structural and Chemical State Analyses on Nitrided GaOOH as a Visible Light Response Photocatalyst2022

    • Author(s)
      Yamamoto Muneaki、Kato Yuma、Yagi Shinya、Tanabe Tetsuo、Yoshida Tomoko
    • Journal Title

      e-Journal of Surface Science and Nanotechnology

      Volume: 20 Issue: 1 Pages: 1-6

    • DOI

      10.1380/ejssnt.2022-003

    • NAID

      130008158079

    • ISSN
      1348-0391
    • Year and Date
      2022-02-05
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mixed phases of GaOOH/α-Ga2O3 and α-Ga2O3/β-Ga2O3 prepared by high energy ball milling as active photocatalysts for CO2 reduction with water2022

    • Author(s)
      T. Aoki, M. Yamamoto, T. Tanabe, T. Yoshida
    • Journal Title

      New J. Chem

      Volume: 46 Issue: 7 Pages: 3207-3213

    • DOI

      10.1039/d1nj05245d

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Synthesis of meso-porous a-Ga2O3 from liquid Ga metal having significantly high photocatalytic activity for CO2 reduction with water2022

    • Author(s)
      T. Aoki, K. Ichikawa, K. Sonoda, M. Yamamoto, T. Tanabe, T. Yoshida
    • Journal Title

      RSC Adv.

      Volume: 12 Issue: 12 Pages: 7164-7167

    • DOI

      10.1039/d1ra09039a

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synthesis of nanometer-sized gallium oxide using graphene oxide template as a photocatalyst for carbon dioxide reduction2021

    • Author(s)
      K. Sonoda, M. Yamamoto, T. Tanabe, T. Yoshida
    • Journal Title

      Applied Surface Science

      Volume: 542 Pages: 148680

    • DOI

      10.1016/j.apsusc.2020.148680

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2019637

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synthesis of α-Ga<sub>2</sub>O<sub>3</sub> by Water Oxidation of Metallic Gallium as a Photocatalyst for CO<sub>2</sub> Reduction with Water2021

    • Author(s)
      Sonoda Kenta、Yamamoto Muneaki、Tanabe Tetsuo、Yoshida Tomoko
    • Journal Title

      ACS Omega

      Volume: 6 Issue: 29 Pages: 18876-18880

    • DOI

      10.1021/acsomega.1c02088

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of Ag Clusters on the Electronic Structures of β-Ga<sub>2</sub>O<sub>3</sub> Photocatalyst Surfaces2021

    • Author(s)
      Yamamoto Muneaki、Kuwabara Akihide、Yoshida Tomoko
    • Journal Title

      ACS Omega

      Volume: 6 Issue: 49 Pages: 33701-33707

    • DOI

      10.1021/acsomega.1c04730

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Real time measurements of UV-vis diffuse reflectance of silver nanoparticles on gallium oxide photocatalyst2021

    • Author(s)
      Kitajima Daiki、Yamamoto Muneaki、Tanabe Tetsuo、Yoshida Tomoko
    • Journal Title

      Catalysis Today

      Volume: 375 Pages: 501-505

    • DOI

      10.1016/j.cattod.2020.04.063

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2019704

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] プラズマ駆動型化学反応系の複合分析と機能材料の開拓2023

    • Author(s)
      吉田朋子
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Generation of visible light response photocatalysis by nitrogen doping into metal oxides2022

    • Author(s)
      T. Yoshida
    • Organizer
      第32回日本MRS年次大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Characterization of nitrogen doped TiO2 photocatalysts by X-ray absorption and photoemission spectroscopies2022

    • Author(s)
      T. Yoshida, T. Tanabe, S. Yagi M. Yamamoto
    • Organizer
      14th International Symposium on Atomic Level Characterizations for New Materials and Devices '22
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improvement of photocatalytic activity of Ga2O3 by applying high energy ball milling2021

    • Author(s)
      Tomomi Aoki, Ryota Ito, Kenta Sonoda, Masato Akatsuka, Muneaki Yamamoto, Tetsuo Tanabe, Tomok Yoshida
    • Organizer
      The international Chemical Congress of Pacific Basin Societies 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Fabrication of metal sulfide photoanodes for CO2 reduction under visible light2021

    • Author(s)
      Itsuki Tanaka, Tomoko Yoshida, Masanobu Higashi
    • Organizer
      The international Chemical Congress of Pacific Basin Societies 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Application of nitrogen doping to the fabrication of visible light response metal oxide photocatalysts2021

    • Author(s)
      Muneaki Yamamoto, Yuma Kato, Tetsuo Tanabe, Tomoko Yoshida
    • Organizer
      International Conference on Mixed-Anion Compounds
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Application of soft X-ray spectroscopy to chemical state analysis of nitrogendoped TiO2 photocatalyst2021

    • Author(s)
      Tomoko Yoshida, Akiyo Ozawa, Tetsuo Tanabe, Shinya Yagi, Muneaki Yamamoto
    • Organizer
      The international Chemical Congress of Pacific Basin Societies 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Surface modification effects of gallium oxide photocatalyst for carbon dioxide reduction2021

    • Author(s)
      Tomoko Yoshida, Masato Akatsuka, Ryota Ito, Kokoro Yoshioka, TetsuoTanabe, Muneaki Yamamoto
    • Organizer
      The international Chemical Congress of Pacific Basin Societies 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Fabrication of CdS photoanodes for CO2 reduction under visible light2021

    • Author(s)
      Itsuki Tanaka, Tomoko Yoshida, Masanobu Higashi
    • Organizer
      13th International Symposium on Atomic level characterizations for New Materials and Devices ’21
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structural modification of β-Ga2O3 to improve the photocatalytic activity for CO2 reduction2021

    • Author(s)
      Tomoko Aoki, Muneaki Yamamoto, Tetsuo Tanabe, Tomoko Yoshida
    • Organizer
      13th International Symposium on Atomic level characterizations for New Materials and Devices ’21
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Chemical state analysis of Ag loaded Ga2O3 as a CO2 reduction photocatalyst2021

    • Author(s)
      Muneaki Yamamoto, Tetsuo Tanabe, Shinya Yagi, Tomoko Yoshida
    • Organizer
      13th International Symposium on Atomic level characterizations for New Materials and Devices ’21
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Book] 触媒総合事典2023

    • Author(s)
      触媒学会
    • Total Pages
      544
    • Publisher
      朝倉書店
    • ISBN
      9784254252743
    • Related Report
      2022 Annual Research Report
  • [Book] 固体表面キャラクタリゼーション 機能性材料・ナノマテリアルのためのスペクトロスコピー2022

    • Author(s)
      山下 弘巳、吉田 寿雄、田中 庸裕
    • Total Pages
      304
    • Publisher
      講談社
    • ISBN
      9784065261262
    • Related Report
      2022 Annual Research Report
  • [Book] 金属ナノ粒子、微粒子の合成、調製と最新応用技術2021

    • Author(s)
      山本宗昭, 吉田朋子
    • Total Pages
      558
    • Publisher
      技術情報協会
    • ISBN
      9784861048623
    • Related Report
      2021 Research-status Report

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Published: 2021-07-13   Modified: 2024-01-30  

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