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用光电流作用谱、光电流电势图等光电化学方法研究了ＴｉＯ２／聚苯胺复合多孔膜电极在不含氧化还原对和含有不同氧化还原对体系中的光电转换过程．结果说明，ＴｉＯ２／聚苯胺复合多孔膜电极为双层ｎ－型半导体结构，ＴｉＯ２多孔膜的禁带宽度为３．２ｅＶ，外层聚苯胺膜的禁带宽度为２．８８ｅＶ．用导电高聚物修饰半导体电极可以使可见光区光吸收增强，光电流明显增加，产生光电流起始波长红移至＞６００ｎｍ，从而提高了宽禁带半导体电极的光电转换效率．
The photoelectrochemical conversion of TiO2 / polyaniline composite porous membrane electrode in the system without redox couple and with different redox couple was studied by photoelectrochemical methods such as photocurrent spectrum and photocurrent-potential diagram. The results show that the TiO2 / polyaniline composite porous membrane electrode has a double n-type semiconductor structure, the band gap of TiO2 porous membrane is 3.2 eV and the band gap of the outer polyaniline membrane is 2.88 eV. The modification of semiconductor electrodes with conductive polymers can enhance the light absorption in the visible region, and increase the photocurrent. The initial wavelength of photocurrent is red-shifted to> 600 nm, which increases the photoelectric conversion efficiency of the wide bandgap semiconductor electrode.