ZnO薄膜的掺Ag改性及其光催化降解苯酚性能研究  

Photocatalystic Property of Ag-Doped Sol-Gel ZnO Films

作　　者：孙汪典[1] 王英连[1] 

机构地区：[1]暨南大学物理系,广州510632

出　　处：《真空科学与技术学报》2007年第4期309-311,共3页Chinese Journal of Vacuum Science and Technology

基　　金：广东省自然科学基金项目(No.031921)

摘　　要：在溶胶-凝胶法制备ZnO薄膜的过程中掺入Ag,通过XRD、AFM和UV-Vis吸收光谱对该薄膜进行了表征。研究了掺Ag对ZnO薄膜光催化降解苯酚性能的影响。结果表明,ZnO薄膜掺入Ag之后,增强了薄膜的光吸收能力,而且使薄膜的紫外线吸收边出现了红移。适量Ag的掺入有利于ZnO薄膜光催化效率的提高。制备薄膜时醋酸锌与AgNO3的摩尔比为30∶1的ZnO∶Ag样品光催化效果最佳,其3 h光催化苯酚降解率是改性前的1.47倍。Ag-doped ZnO films,grown by sol-gel,were characterized with diffraction（XRD）,atomic force microscopy（AFM）,ultra-violet visible （UV-Vis）spectrosopy to understand its photocatalytic properdes.The results show that the Ag doping results in a red-shift of the ultra-violet absorption edge and enhancement of photocatalytic properties, The Ag-doped ZnO films,grown with a mole fraction of zinc acetate and silver nitrate being 30：1, display the best photocatalytic property. Its phenol degradation efficiency after 3 h irradiation is 1.47 times of that of the pure ZnO film.

关 键 词：ZnO:Ag薄膜XRD UV-Vis吸收光谱 光催化降解 苯酚 

分 类 号：TQ034[化学工程] X703.5[环境科学与工程—环境工程]