TiO_2/SnO_2复合薄膜光诱导超亲水性机理的XPS研究  

XPS study on mechanism of photo-induced super-hydrophilicity of TiO_2/SnO_2 composite film

作　　者：杨喜昆[1] 柳清菊[2] 朱忠其[2] 李翼[1] 张瑾[2] 王绍华[1] 

机构地区：[1]昆明理工大学分析测试研究中心,云南昆明650051 [2]云南大学材料科学与工程系,云南昆明650091

出　　处：《功能材料》2007年第1期101-104,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50162002);教育部新世纪优秀人才支持计划资助项目(NCET-040915);云南省自然科学基金资助项目(2005E0007M);云南省教育厅科学研究基金资助项目(540038A)

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。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.

关 键 词：TiO2/SnO2复合膜 亲水性 活性基团 

分 类 号：O484[理学—固体物理] O643[理学—物理]