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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (3): 215-218. 上一篇    下一篇

研究论文

纳米结构TiO2/聚3-甲基噻吩多孔膜电极光电化学研究

郝彦忠*, 1, 2，武文俊1   

  1. 1河北科技大学理学院 2河北科技大学化学与制药工程学院 石家庄 050018
  • 投稿日期:2004-04-07 修回日期:2004-10-08 发布日期:2010-12-10
  • 通讯作者: 郝彦忠

Photoelectrochemical Study on the Nanostructured TiO2/PMT Film Electrode

HAO Yan-Zhong*, 1, 2,WU Wen-Jun2   

  1. 1 College of Science, 2 College of Chemical & Pharmaceutical Engineering,
    Hebei University of Science and Technology, Shijiazhuang 050018
  • Received:2004-04-07 Revised:2004-10-08 Published:2010-12-10
  • Contact: HAO Yan-Zhong

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用光电流作用谱、光电流-电势图、紫外-可见吸收光谱等光电化学方法研究了导电玻璃(ITO)/TiO2/聚3-甲基噻吩(PMT)电极的光电转换性质. 结果表明, PMT膜为p型半导体, 其禁带宽度为1.93 eV. 并通过循环伏安和光电化学方法确定了其导带位置为－3.44 eV, 价带为－5.37 eV, 在纳米TiO2与PMT之间存在p-n异质结, ITO/TiO2/PMT电极不仅提高了光电流, 而且使产生光电流的起始波长红移至＞600 nm, 从而提高了宽禁带半导体的光电转换效率.

关键词: TiO2/PMT复合膜电极, 光电化学, 导电聚合物

The photon-current conversion properties of nanostructured TiO2/poly(3-methythiophene) (PMT) film electrode were studied by using the photocurrent action spectra, the photocurrent dependence of potential and UV-Vis absorption spectra. The bandgap of PMT film is 1.93 eV. The diagram of energy level of PMT film was determined with cyclic voltamogramm and photoelectrochemical method. The conduction band of PMT film is －3.44 eV. The p-n heterojunction existed in the TiO2/PMT film electrode, which favors the separation of electron-hole pairs. The nanostructure can enlarge the visible optical absorption region and obviously increase the photocurrent in visible region. The photocurrent threshold shifted to ＞600 nm, and the photon-electron conversion efficiency could be improved.

Key words: nanostructured TiO2/PMT electrode, photoelectrochemistry, conducting polymer