フェムト秒レーザ照射による酸化チタン膜の光触媒機能変化 Variation of Photocatalytic Function of TiO_2 Film by Femtosecond Laser Irradiation

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  Titanium dioxide (TiO<SUB>2</SUB>) is functional ceramics and shows the photocatalytic function by ultraviolet light illumination. This photocatalytic function enables decomposition of organic matter such as bacteria, mold and odors. In our previous study, the TiO<SUB>2</SUB> film was darkened by the femtosecond laser irradiation and electrical resistance of the darkened film was decreased. In this study, we investigated variation of the photocatalytic function of the darkened TiO<SUB>2</SUB> films. The TiO<SUB>2</SUB> film was produced by aerosol beam irradiation. The wavelength, the pulse width and the repetition rate of the femtosecond laser were 775 nm, 150 fs and 1 kHz, respectively. The laser spot was scanned on the whole area of the TiO<SUB>2</SUB> film surface and the laser fluence was changed within the laser fluence regime in which the laser ablation was not caused and topography of the film surface was not varied. The photocatalytic function of the darkened TiO<SUB>2</SUB> films was evaluated in the acetaldehyde decomposition test. In the test, the films in acetaldehyde were illuminated with the UV and visible light sources, respectively. The acetaldehyde concentration was measured every hour during the illumination. The results of the test shows that the film had photocatalytic function by visible light illumination.

収録刊行物

  • 高温学会誌

    高温学会誌 37(6), 311-315, 2011-11-20

    High Temperature Society of Japan

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各種コード

  • NII論文ID(NAID)
    10030167086
  • NII書誌ID(NCID)
    AN00080051
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03871096
  • NDL 記事登録ID
    023339837
  • NDL 請求記号
    Z15-317
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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