高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (2): 283.

• 研究快报 • 上一篇    下一篇

Au/PATP/PANI膜电极和Au/PATP/PANI/TiO2膜电极的光电化学

黄怀国, 罗瑾, 张红平, 吴玲玲, 林仲华   

  1. 厦门大学固体表面物理化学国家重点实验室, 化学系, 物理化学研究所, 厦门 361005
  • 收稿日期:1999-08-04 出版日期:2000-02-24 发布日期:2000-02-24
  • 通讯作者: 林仲华(1941年出生),男,教授,博士生导师,从事电化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29833060,29703006)资助

The Photoelectrochemistry of Au/PATP/PANI Film Electrode and Au/PATP/PANI/TiO2Film Electrode

HUANG Huai-Guo, LUO Jin, ZHANG Hong-Ping, WU Ling-Ling, LIN Zhong-Hua   

  1. State Key Laboratory for Physical Chemistry of the Solid Surface, Department of Chemistry, Institute of Physical Chemistry, Xiamen University, Xiamen 361005, China
  • Received:1999-08-04 Online:2000-02-24 Published:2000-02-24

关键词: 聚苯胺, TiO2, 光电化学

Abstract: Au/PATP/PANI (polyaniline) film electrode was prepared by voltamometry in0.5mol/Laniline/0.5 mol/L HClO4from -0.2-0.8 Vat 100 mV/s after selfassembling PATP(4aminothiophenol) on bare Au. The potential dependence of photocurrent and the photocurrent spectra of Au/PATP/PANIfilm electrode were obtained. The potential dependence of photocurrent showed that all of the three forms(oxidized/partiallyoxidized/reduced) of PANIfilm had both anodic photocurrent and cathodic photocurrent. The halfoxidized PANIfilm had a great photoelectrochemical response. The photocurrent spectra of Au/PATP/PANIfilm electrode showed both half oxidized and reduced PANIfilm had the characteristics of subbandgap photocurrent spectra and followed Fowler rule(IPCE1/2 =Ethreshold+ bhν). Aphotoelectrochemical model on internal photoemission at insulator covered metal was presented to interpret it, which agreed with the model of granular metal island. The model assumed metallic polymer particles embedded in the nonmetallic matrix, while, Au/PATP/PANI/TiO2film electrode was prepared by electrodeposition in TiCl3solution (pH≈2.2). The photocurrent spectra of Au/PATP/PANI/TiO2film possessed the photoelectrochemical characteristics of both TiO2and PANI. The Au/PATP/PANI/TiO2film was expected to improve the efficient absorption of solar light.

Key words: Polyaniline, TiO2, Photoelectrochemistry

中图分类号: 

TrendMD: