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2012 Fiscal Year Final Research Report

Preparation and Characterization of CaO-Bi2O3 Complex Oxide

Research Project

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Project/Area Number 22550184
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic industrial materials
Research InstitutionKitakyushu National College of Technology

Principal Investigator

MATSUSHIMA Shigenori  北九州工業高等専門学校, 物質化学工学科, 教授 (80229476)

Co-Investigator(Kenkyū-buntansha) OBATA Kenji  北九州工業高等専門学校, 物質化学工学科, 准教授 (70370046)
Project Period (FY) 2010 – 2012
Keywords光触媒 / 無機微粒子の合成 / 機器分析 / 電子構造計算
Research Abstract

The single phase of Ca4Bi6O13 crystal was obtained at lower calcination temperature in a citric acid complex method in comparison with a solid-state reaction method. It was confirmed that the photocatalytic activity of Ca4Bi6O13 for the degradation of methylene blue (MB) was higher in a citric acid complex method than in a solid-state reaction under visible-light irradiation (λ ? 420 nm). When Sr was added to Ca4Bi6O13, the optical band gap of Ca4Bi6O13 decreases slightly and the photocatalytic activity was improved. Further, we performed first-principles band calculation of Ca4Bi6O13 to determine the type of the optical transition, the characters of valence and conduction bands, and the band-gap energy. Ca4Bi6O13 is a direct-gap oxide and the energy states near the valence band maximum (VBM) and conduction band minimum (CBM) show wide dispersion, indicating a higher mobility of holes and electrons generated by band gap excitation. In addition, Ca4Bi6O13 has a distorted local structure consisting of [BiO6] polyhedron and a consequent dipole moment. Thus, a high photocatalytic ability of Ca4Bi6O13 is attributable to both the wide band dispersion near the valence band maximum and the conduction band minimum and its distorted local crystal structure.

  • Research Products

    (15 results)

All 2013 2012 2011 2010

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (10 results)

  • [Journal Article] Preparation and Characterization of CaO-Bi2O3 Complex Oxide2013

    • Author(s)
      H. Nakamura, T. Uehara, Y. Obukuro,K. Obata, S. Matsushima, M. Arai, K. Kobayashi
    • Journal Title

      International Journal of Nanotechnology

      Volume: 10 Pages: pp. 100-107

    • Peer Reviewed
  • [Journal Article] First-principles Study on Electronic Structure and Optical Properties of Ca4Bi6O13 Crystal2013

    • Author(s)
      H. Nakamura, Y. Obukuro, K. Obata,S. Matsushima, M. Arai, K. Kobayashi
    • Journal Title

      Journal of Physics and Chemistry of Solids

      Volume: 74 Pages: pp. 25-29

    • Peer Reviewed
  • [Journal Article] Preparation and Characterization of CaO-Bi2O3 Complex Oxide2012

    • Author(s)
      H. Nakamura, T. Uehara, Y. Obukuro,K. Obata, S. Matsushima, M. Arai, K. Kobayashi
    • Journal Title

      Functional Mterials Letters

      Volume: 5 Pages: pp.1260015-1~1260015-4

    • Peer Reviewed
  • [Journal Article] Preparation and Characterization of CaO-Bi2O3 Complex Oxide2011

    • Author(s)
      H. Nakamura, T. Uehara, Y. Obukuro,K. Obata, S. Matsushima, M. Arai, K. Kobayashi
    • Journal Title

      Proceedings of the 4th International Symposium on Functional Materials

      Volume: PA-17 Pages: pp. 111

    • Peer Reviewed
  • [Journal Article] Preparation and Characterization of Ca4Bi6O13 Complex Oxide2011

    • Author(s)
      K. Obata, K. Matsumoto, T. Uehara,A. Doi, Y. Obukuro, S. Matsushima
    • Journal Title

      Chemistry Letters

      Volume: 3 Pages: pp. 288-289

    • Peer Reviewed
  • [Presentation] Preparation and Characterization of CaO-Bi2O3 Complex Oxide2011

    • Author(s)
      H. Nakamura, T. Uehara, Y. Obukuro,K. Obata, S. Matsushima, M. Arai,K. Kobayashi
    • Organizer
      The 4th International Symposium on Functional Materials
    • Year and Date
      20110800
  • [Presentation] Ca4Bi6O13 へのSr のドープ効果2011

    • Author(s)
      上原拓也, 小畑賢次, 松嶋茂憲
    • Organizer
      第48回化学関連支部合同九州大会
    • Year and Date
      20110700
  • [Presentation] 液相法によるCa4Bi6O13 の調製及びキャラクタリゼーション2011

    • Author(s)
      竹永正博, 小畑賢次, 松嶋茂憲
    • Organizer
      第48回化学関連支部合同九州大会
    • Year and Date
      20110700
  • [Presentation] クエン酸錯体法によるビスマス系アルカリ土類複合酸化物の調製とキャラクタリゼーション2011

    • Author(s)
      小袋由貴, 上原拓也, 小畑賢次, 竹原健司, 松嶋茂憲
    • Organizer
      日本化学会第91 春季年会
    • Year and Date
      20110300
  • [Presentation] クエン酸錯体法により調製したCa4Bi6O13 粉体における不純物の添加効果2011

    • Author(s)
      上原拓也, 小畑賢次, 松嶋茂憲
    • Organizer
      第49回セラミックス基礎科学討論会
    • Year and Date
      20110100
  • [Presentation] Ca4Bi6O13 粉体の調製方法の検討2011

    • Author(s)
      竹永正博, 小畑賢次, 松嶋茂憲
    • Organizer
      第49回セラミックス基礎科学討論会
    • Year and Date
      20110100
  • [Presentation] 不純物をドープしたCa4Bi6O13 の調製とキャラクタリゼーション2010

    • Author(s)
      上原拓也, 小畑賢次, 松嶋茂憲
    • Organizer
      日本セラミックス協会九州支部秋季合同研究発表会
    • Year and Date
      20101200
  • [Presentation] Ca4Bi6O13 の低温合成2010

    • Author(s)
      小畑賢次,竹永正博, 松嶋茂憲
    • Organizer
      日本化学会西日本大会
    • Year and Date
      20101100
  • [Presentation] 異種元素を添加したCa4Bi6O13 の調製とキャラクタリゼーション2010

    • Author(s)
      松本健佑, 小畑賢次, 松嶋茂憲
    • Organizer
      第47回化学関連支部合同九州大会
    • Year and Date
      20100700
  • [Presentation] 異種元素をドープしたCa4Bi6O13 の調製とキャラクタリゼーション2010

    • Author(s)
      小畑賢次, 上原拓也, 松嶋茂憲
    • Organizer
      日本化学会西日本大会
    • Year and Date
      20100700

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Published: 2014-08-29  

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