Au/TiO_2薄膜的制备及其光催化氧化对硝基苯酚的性能  

Preparation of Au/TiO_2 Film and Its Photocatalytic Performance for Oxidation of p-Nitrophenol

作　　者：刘秀华[1] 傅依备[1] 谢云[2] 邓义[1] 钟志京[1] 梁霞[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900 [2]西南大学资源与环境学院,重庆400716

出　　处：《催化学报》2006年第6期532-536,共5页

基　　金：中国工程物理研究院科学技术基金(20050546)资助项目

摘　　要：采用溶胶-凝胶法制备了掺杂Au的Ti O2薄膜,考察了其光催化氧化对硝基苯酚的活性,并采用原子力显微镜、X射线光电子能谱、热重-差示量热扫描和X射线衍射技术对薄膜进行了表征.结果表明,Au/Ti O2薄膜主要含有Ti,O,Au和C元素,其中Au主要以0价形式存在.经高温焙烧后薄膜中的Au向表面聚集,随着焙烧温度的升高,薄膜表面逐渐变得粗糙,颗粒逐渐变大,薄膜的光催化活性下降.与纯Ti O2薄膜相比,掺杂Au的Ti O2薄膜的光催化活性有所提高,在673K下焙烧的Au/Ti O2薄膜的光催化活性较好,反应1h后对硝基苯酚的降解率可以达到51·4%.The Au-doped TiO2 thin film was prepared by the sol-gel method and characterized with atomic force microscopy, X-ray photoelectron spectroscopy, thermogravimetry, differential scanning calorimetry, and X-ray diffraction. The results showed that there were Ti, O, Au, and C elements in the Au/TiO2 film, and the Au existed in a metallic state. The Au/TiO2 film surface became more coarse, the grain size grew gradually, and the photocatalytic activity decreased with the increase in the calcination temperature. Compared with the pure TiO2 film, the photocatalytic activity of Au/TiO2 thin film improved. The Au/TiO2 film calcined at 673 K showed a higher photocatalytic activity, and the degradation rate of p-nitrophenol was 51.4 % after 1 h reaction.

关 键 词：金 二氧化钛 薄膜 硝基苯酚 光催化 

分 类 号：O643.32[理学—物理化学]