中文摘要：

利用X射线光电子能谱仪对用溶胶-凝胶法制备的TiO2／SnO2复合薄膜的表面化学状态进行分析，结果表明：热处理及紫外光照前后，薄膜表面的化学状态均发生了变化，薄膜表面的碳氧或过氧化物基团增加，这些基团具有较强的活性，通过氢键和水中的极性基团作用，产生超亲水性。此外，掺杂SnO2提高了TiO2／SnO2复合薄膜的表面能，改变了薄膜表面的化学结构，使TiO2薄膜获得了较好的亲水性能和催化活性。

英文摘要：

X-ray photoelectron spectroscopy（XPS）is used to determine the surface chemical states of TiO2/SnO2 composite thin-films which were prepared on soda-lime glass with sol-gel method. The results show that the surface chemical states of TiO2/SnO2 composite thin-films have changed after heat-treatment and UV illumination, and that a great deal of oxygen-containing groups or peroxides are produced on TiO2 thin-film surface. Oxide active groups, generated during this process, react with polar groups in water by hydrogen bonds and lead to super-hydrophilicity. In addition,the doping of SnO2 into TiO2 can enhance surface energy and change the surface chemical structure of TiO2/SnO2 composite thin films, which make thin-film gain better hydrophilicity and higher photocatalytie activity.