TiO_2/SiO_2纳米介孔复合薄膜的制备及其光催化降解性能研究  

Preparation of Porous TiO_2/SiO_2 Nanocomposite Films and Their Photoc Atalytic Properties in Ammonia Degradation

作　　者：倪小敏[1] 张小俊[2] 蔡昕[1] 肖修昆[1] 金翔[1] 廖光煊[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026 [2]中国科学技术大学化学系,合肥230026

出　　处：《安全与环境工程》2009年第2期40-43,47,共5页Safety and Environmental Engineering

基　　金：国家科技部科技支撑计划专题项目(2006BAK01B03-1)资助

摘　　要：采用两步溶胶-凝胶法制备了TiO2/SiO2纳米介孔复合薄膜,经X-射线衍射(XRD)、傅立叶变换红外光谱(FTIR)和透射及扫描电子显微镜(TEM,SEM)表征,显示介孔复合薄膜中锐钛矿型TiO2纳米粒子均匀分散在SiO2介孔基底中,经光催化降解氨气的试验,结果表明该介孔复合薄膜的光催化活性比普通的TiO2粒子有较大的提高。Nanosized composite films of TiO2/SiO2 were fabricated by a two-step solgel method. A series of characterizations of X-ray diffraction （XRD）, Fourier transform infrared （FTIR） spectra and transmission electron microscopy （TEM） revealed that anatase nanoparticles dispersed homogeneously in the matrix of porous silica film. Thus prepared nanocomposite films exhibited higher efficiency than the conventional counterparts in the photoc atalytic degradation of gaseous ammonia under the same conditions.

关 键 词：TiO2/SiO2介孔复合薄膜 氨气 光催化降解 

分 类 号：X701[环境科学与工程—环境工程]