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Fabrication of photocatalyst composites of C3N4 with steel slag for carbon negative

Research Project

Project/Area Number 22KF0299
Project/Area Number (Other) 22F22083 (2022)
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeMulti-year Fund (2023)
Single-year Grants (2022)
Section外国
Review Section Basic Section 64030:Environmental materials and recycle technology-related
Research InstitutionKyushu University

Principal Investigator

笹木 圭子  九州大学, 工学研究院, 教授 (30311525)

Co-Investigator(Kenkyū-buntansha) SRIKHAOW ASSADAWOOT  九州大学, 工学研究院, 外国人特別研究員
Project Period (FY) 2023-03-08 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2023: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2022: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordsジオミメティクス / 鉄鋼スラグ / 光触媒複合体 / 窒化炭素 / カーボンニュートラル / Steel slag / graphitic carbon nitride / sugar conversion / lactic acid production / photobiorefinery / steel slag utilization
Outline of Research at the Start

The outline of research. 1) Enhancing the basicity and photocatalytic activity of g-C3N4 by alkaline-earth metal doping (Mg, Ca or Sr). 2) Improving the photogenerated charge separation, transportation by construction of heterojunction between the steel converter slag-bearing Ca2Fe2O5/alkaline-earth metal modified g-C3N4 (CS/AMCN). 3) Evaluation of the photocatalytic conversion of glucose to lactic acid under the simulated sunlight irradiation using CS/AMCN as photocatalyst. Furthermore, optimal conditions, the reaction mechanism and reusability of the obtained composites will be studied.

Outline of Annual Research Achievements

日本の鉄鋼業がCO2排出の最大業種となっている背景から、鉄鋼スラグを基とした窒化炭素との光触媒複合体を合成し、カーボンサイクルを促進する糖から乳酸への転換反応を加速する反応に応用した。鉄鋼するラグはよく定義されたものを使用するため、実際の転炉スラグを模した人工スラグを合成した。人工転炉スラグには可視光域にバンドギャップをもつ光触媒の一種であるCa2Fe2O5が含まれている。人工転炉スラグを基として、dicyandiamide を前駆体とし、酸素ドープC3N4を結晶化させた。人工転炉スラグの混合率が5%のときに可視光照射下で、90%以上の乳酸転換率が得られた。この光触媒複合体によって、グルコースだけではなく、フルクトースや五炭糖のキシロースでも乳酸の収率は90%以上、グルコース転換率は100%が得られた。光照射下での励起電子の移動方向は、Ca2Fe2O5側からC3N4g側であること、主要ラジカルは・OHと・O2-であることから、複合体内での電子移動を含めた光触媒反応機構はType IIではなく、Zスキーム型であることが推定された。この複合体の人工スラグを実際の転炉スラグに置き換えた場合にも同様の光触媒効率が確認された。この内容はChemical Engineering Journalに掲載された。
乳酸への転換率をさらに向上させるにはよりアルカリ度を上げ、異性化平衡をシフトさせることが効果的との予測から、C3N4にアルカリ金属およびアルカリ土類金属のドープを試みた。最も効果的であったのはMgドープで、ドープ量を最適化し、実際の転炉スラグと複合化させた。その結果、光源4000W/cm2 Xeランプからの光照射条件のもとで乳酸の収率は71%、グルコース転換率は97%がえられ、上述の酸素ドープC3N4と転炉スラグとの複合体と比較すると、Mgドープ型がより優れていることが確認された。

Report

(2 results)
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • Research Products

    (10 results)

All 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (2 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] Mahidol University(タイ)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Solar-light-driven photocatalytic conversion of monosaccharide by oxygen-doped graphitic carbon nitride/artificial steel converter slag composite2023

    • Author(s)
      Srikhaow Assadawoot、Chuaicham Chitiphon、Shenoy Sulakshana、Trakulmututa Jirawat、Sasaki Keiko
    • Journal Title

      Chemical Engineering Journal

      Volume: 473 Pages: 145167-145167

    • DOI

      10.1016/j.cej.2023.145167

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fe-Loaded Montmorillonite/TiO2 Composite as a Promising Photocatalyst for Selective Conversion of Glucose to Formic Acid under Visible-Light Irradiation2023

    • Author(s)
      Srikhaow Assadawoot、Zhang Li、Chuaicham Chitiphon、Trakulmututa Jirawat、Shenoy Sulakshana、Sasaki Keiko
    • Journal Title

      Crystals

      Volume: 13 Issue: 12 Pages: 1609-1609

    • DOI

      10.3390/cryst13121609

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Simultaneous Photocatalytic Sugar Conversion and Hydrogen Production Using Pd Nanoparticles Decorated on Iron-Doped Hydroxyapatite2023

    • Author(s)
      Chuaicham Chitiphon、Noguchi Yuto、Shenoy Sulakshana、Shu Kaiqian、Trakulmututa Jirawat、Srikhaow Assadawoot、Sekar Karthikeyan、Sasaki Keiko
    • Journal Title

      Catalysts

      Volume: 13 Issue: 4 Pages: 675-675

    • DOI

      10.3390/catal13040675

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Recent Clay-Based Photocatalysts for Wastewater Treatment2023

    • Author(s)
      Chuaicham Chitiphon、Trakulmututa Jirawat、Shu Kaiqian、Shenoy Sulakshana、Srikhaow Assadawoot、Zhang Li、Mohan Sathya、Sekar Karthikeyan、Sasaki Keiko
    • Journal Title

      Separations

      Volume: 10 Issue: 2 Pages: 77-77

    • DOI

      10.3390/separations10020077

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Bio-reduced Ag nanoparticle decorated on ZnO for enhancement of photocatalytic reduction of hexavalent chromium and photocatalytic degradation of rhodamine B2023

    • Author(s)
      Chuaicham Chitiphon、Rizki Intan Nurul、Sekar Karthikeyan、Shenoy Sulakshana、Srikhaow Assadawoot、Trakulmututa Jirawat、Sasaki Keiko
    • Journal Title

      Journal of Alloys and Compounds

      Volume: 939 Pages: 168797-168797

    • DOI

      10.1016/j.jallcom.2023.168797

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Fabrication of Reduced Ag Nanoparticle Using Crude Extract of Cinnamon Decorated on ZnO as a Photocatalyst for Hexavalent Chromium Reduction2023

    • Author(s)
      Rizki Intan Nurul、Inoue Takumi、Chuaicham Chitiphon、Shenoy Sulakshana、Srikhaow Assadawoot、Sekar Karthikeyan、Sasaki Keiko
    • Journal Title

      Catalysts

      Volume: 13 Issue: 2 Pages: 265-265

    • DOI

      10.3390/catal13020265

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of transformation temperature toward optical properties of derived CuO/ZnO composite from Cu?Zn hydroxide nitrate for photocatalytic ciprofloxacin degradation2022

    • Author(s)
      Trakulmututa Jirawat、Chuaicham Chitiphon、Shenoy Sulakshana、Srikhaow Assadawoot、Sasaki Keiko、Smith Siwaporn Meejoo
    • Journal Title

      Optical Materials

      Volume: 133 Pages: 112941-112941

    • DOI

      10.1016/j.optmat.2022.112941

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Oxygen-doped graphitic carbon nitride/artificial steel converter slag composite as the low-cost catalyst for solar light driven photocatalytic conversion of sugar,2023

    • Author(s)
      Assadawoot Srikhoaw, Chitiphon Chuaicham, Keiko Sasaki
    • Organizer
      ACS 2023 spring
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Oxygen-doped graphitic carbon nitride/artificial steel converter slag composite as the low-cost catalyst for solar light driven photocatalytic conversion of sugar2023

    • Author(s)
      Assadawoot Srikhoaw, Chitiphon Chuaicham, Keiko Sasaki,
    • Organizer
      ACS 2023 spring.
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research

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Published: 2022-04-28   Modified: 2024-12-25  

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