在半导体胶体表面进行的光诱导电子转移过程是当前光化学研究的一个活跃领域.多数半导体材料导带与价带间的能隙约为3eV,对紫外光有较强的吸收,但却不能有效利用日光中的可见光.若在半导体胶体体系中加入特定的光敏剂,使之吸附在半导体胶体表面,则光敏剂受光激发后,能够将其电子转移至半导体的导带,并可进一步传递给其它物质,使其发生氧化还原反应,从而扩展了半导体材料的光响应范围. Photoinduced electron transfer at the surface of semiconductor colloids is an active field of current photochemical research.Most semiconductor materials have a band gap of about 3eV between the conduction band and the valence band, which absorbs ultraviolet light but can not be utilized effectively Visible light in daylight If a specific photosensitizer is added to the semiconductor colloidal system to make it adsorb on the surface of the colloidal semiconductor, the photosensitizer is excited by the light and then can transfer its electrons to the conduction band of the semiconductor and further to other substances , So that it redox reaction, thereby extending the optical response of semiconductor materials.