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2007 Fiscal Year Final Research Report Summary

Photorechargeability and charge transfer characteristics in titanium oxide photocatalytic films with selforganized nano structure

Research Project

Project/Area Number 18560022
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionKagoshima University

Principal Investigator

HORIE Yuji  Kagoshima University, Faculty of Engineering, Associate Professor (50201760)

Co-Investigator(Kenkyū-buntansha) NOMIYAMA Teruaki  Kagoshima University, Faculty of Engineering, Assistant Professor (60274859)
Project Period (FY) 2006 – 2007
Keywordsphotorechargeable battery / titanium oxide / plasma etching / self-organization / photoelectric conversion / photocatalyst
Research Abstract

The photorechargeable battery is a new solar device that converts photon energy to electrochemical energy and stores it in situ in a single cell. Since any external electrical circuits are not necessary for the charge, the application to separated small auxiliary batteries is expected. However, because of the upper limit of the photo-emf, realization of an efficient photocharge is a problem to be solved.
In this research, low energy storage sites were created on the surface of titanium oxide thin films with self-organized nano-structure by the reduction with hydrogen plasma and photo-electrochemical etching. The photo-emf and the photorechargeable quantity reduced in the films when oxygen defects were produced on the surface by the etching, while they showed a rapid increase when the etching was not associated with oxygen defects. If porous films are treated with the same manner, synergistic effect is expected for the photorechargeablity.
Next, the control of the crystal growth was attempted for whisker-shaped thin films by an external electric field and UV light in chemical vapor deposition. An increase of efficiency was expected by the exposure of the sites with high photo activity on the crystal surface with self-organized nano-structure. The change in the crystal growth was observed with the external excitation, while the effect on the photorechargeability was small. Further research with high external excitation is in progress.

  • Research Products

    (23 results)

All 2008 2007 2006

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (19 results) Patent(Industrial Property Rights) (2 results)

  • [Journal Article] Fabrication of N-doped TiO_2 thin films by laser ablation method:mechanism of N-doping and evaluation of the thin films2008

    • Author(s)
      S.Somekawa
    • Journal Title

      Catalysis Communications 9

      Pages: 437-440

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Fabrication of N-doped TiO_2 thin films by laser ablation method : mechanism of N-doping and evaluation of the thin films2008

    • Author(s)
      S. Somekawa
    • Journal Title

      Catalysis Communications Vol.9

      Pages: 437-440

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] WO_3のエレクトロクロミック現象を利用した光蓄電池電極の作製2008

    • Author(s)
      村尾 聡
    • Organizer
      第55回応用物理学関係連合講演会春季講演会
    • Place of Presentation
      日本大学船橋キャンパス
    • Year and Date
      2008-03-30
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Preparation of Photorechargeable Electrodes Using Electrochromic Effect of WO_32008

    • Author(s)
      S. Murao
    • Organizer
      The 55th Spring Meeting, 2008, The Japan Society of Applied Physics
    • Place of Presentation
      Nihon University
    • Year and Date
      2008-03-30
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 光励起CVD法による酸化チタン薄膜の作製2007

    • Author(s)
      東 章敏
    • Organizer
      応用物理学会九州支部学術講演会
    • Place of Presentation
      九州工業大学
    • Year and Date
      2007-12-01
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] グラファイトナノファイバ上に担持した酸化チタン薄膜の光蓄電性2007

    • Author(s)
      神川 隆博
    • Organizer
      応用物理学会九州支部学術講演会
    • Place of Presentation
      九州工業大学
    • Year and Date
      2007-12-01
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Titanium oxide films prepared by photo-excited CVD method2007

    • Author(s)
      A. Higashi
    • Organizer
      Meeting of Kyushu Chapter, The Japan Society of Applied Physics
    • Place of Presentation
      Kyushu Institute of Technology
    • Year and Date
      2007-12-01
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Photorechargeability of TiO_2 Thin Films on Graphite Nanofibers2007

    • Author(s)
      T. Kamikawa
    • Organizer
      Meeting of Kyushu Chapter, The Japan Society of Applied Physics
    • Place of Presentation
      Kyushu Institute of Technology
    • Year and Date
      2007-12-01
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] PLD法でグラファイトナノファイバ上に担持した酸化チタン薄膜の光蓄電性2007

    • Author(s)
      神川 隆博
    • Organizer
      レーザー学会第365回研究会
    • Place of Presentation
      指宿いわさきホテル
    • Year and Date
      2007-09-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] 気相レーザーアブレーション法を用いた光触媒薄膜の作製と評価2007

    • Author(s)
      染川 正一
    • Organizer
      レーザー学会第365回研究会
    • Place of Presentation
      指宿いわさきホテル
    • Year and Date
      2007-09-14
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Photorechargeability of TiO_2 Thin Films on Graphite Nanofibers Prepared by PLD Method2007

    • Author(s)
      T. Kamikawa
    • Organizer
      The 365th Topical Meeting of The Laser Society of Japan
    • Place of Presentation
      Ibusuki Iwasaki Hotel
    • Year and Date
      2007-09-14
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Preparation and Evaluation of Photocatalyst Thin Films Prepared by Gas-Phase Laser Ablation Method2007

    • Author(s)
      S. Somekawa
    • Organizer
      The 365th Topical Meeting of The Laser Society of Japan
    • Place of Presentation
      Ibusuki Iwasaki Hotel
    • Year and Date
      2007-09-14
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 酸化チタン/グラファイトナノファイバ薄膜電極の光蓄電性2007

    • Author(s)
      堀江 雄二
    • Organizer
      第68回応用物理学会学術講演会秋季講演会
    • Place of Presentation
      北海道工業大学
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Photorechargeability of TiO_2 /Graphite Nanofiber Thin Film Electrodes2007

    • Author(s)
      Y. Horie
    • Organizer
      The 68th Autumn Meeting, 2007, The Japan Society of Applied Physics
    • Place of Presentation
      Hokkaido Institute of Technology
    • Year and Date
      2007-09-04
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 酸化チタンを分散させたポリアニリン膜の光蓄電性2007

    • Author(s)
      野見山 輝明
    • Organizer
      電気化学会第74回大会
    • Place of Presentation
      東京理科大学
    • Year and Date
      2007-03-30
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Photorechargeability of TiO_2 -dispersed polyaniline film2007

    • Author(s)
      T. Nomiyama
    • Organizer
      74th Meeting of The Electrochemical Society of Japan
    • Place of Presentation
      Tokyo University of Science
    • Year and Date
      2007-03-30
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] TiO_2/ZnOハイブリッド型光蓄電池電極の作製2006

    • Author(s)
      久野 広将
    • Organizer
      応用物理学会九州支部学術講演会
    • Place of Presentation
      大分大学
    • Year and Date
      2006-11-26
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] TiO_2膜表面における光蓄電反応2006

    • Author(s)
      山下 和貴
    • Organizer
      応用物理学会九州支部学術講演会
    • Place of Presentation
      大分大学
    • Year and Date
      2006-11-26
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] TiO_2/CFs電極における光蓄電反応の光学的in-situ観察2006

    • Author(s)
      早淵 裕哉
    • Organizer
      応用物理学会九州支部学術講演会
    • Place of Presentation
      大分大学
    • Year and Date
      2006-11-26
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Preparation of TiO_2 /ZnO hybrid electrodes of photorechargeable battery2006

    • Author(s)
      K. Hisano
    • Organizer
      Meeting of Kyushu Chapter, The Japan Society of Applied Physics
    • Place of Presentation
      Oita University
    • Year and Date
      2006-11-26
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Photorechargeable reaction at the surface of TiO_2 thin films2006

    • Author(s)
      K. Yamashita
    • Organizer
      Meeting of Kyushu Chapter, The Japan Society of Applied Physics
    • Place of Presentation
      Oita University
    • Year and Date
      2006-11-26
    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] 機能性複合柑, 光蓄電池及び光機能性複合材の製造方法2008

    • Inventor(s)
      野見山 輝明, 網中 浩太, 堀江 雄二
    • Industrial Property Rights Holder
      鹿児島大学
    • Industrial Property Number
      2008-025673
    • Filing Date
      2008-02-05
    • Description
      「研究成果報告書概要(和文)」より
  • [Patent(Industrial Property Rights)] 光蓄電電極、その製造方法及び光蓄電池2007

    • Inventor(s)
      野見山 輝明 堀江 雄二
    • Industrial Property Rights Holder
      鹿児島大学
    • Industrial Property Number
      2007-082111
    • Filing Date
      2007-03-27
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2010-02-04  

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