催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (6): 532-536.

• 研究论文 • 上一篇    下一篇

Au/TiO2薄膜的制备及其光催化氧化对硝基苯酚的性能

刘秀华1,傅依备1,谢云2,邓义1,钟志京1,梁霞1   

  1. 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
  • 收稿日期:2006-06-25 出版日期:2006-06-25 发布日期:2010-08-28

Preparation of Au/TiO2 Film and Its Photocatalytic Performance for Oxidation of p-Nitrophenol

LIU Xiuhua1*, FU Yibei1, XIE Yun2, DENG Yi1, ZHONG Zhijing1, LIANG Xia1   

  1. 1 Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China; 2 College of Resources and Environmental Science, Southwest University, Chongqing 400716, China
  • Received:2006-06-25 Online:2006-06-25 Published:2010-08-28

PDF

731

被引次数

62

摘要： 采用溶胶-凝胶法制备了掺杂Au的TiO2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/TiO2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TiO2薄膜相比,掺杂Au的TiO2薄膜的光催化活性有所提高, 在673 K下焙烧的Au/TiO2薄膜的光催化活性较好,反应1 h后对硝基苯酚的降解率可以达到51.4%.

关键词: 金, 二氧化钛, 薄膜, 硝基苯酚, 光催化

Abstract: 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.

Key words: gold, titanium dioxide, film, nitrophenol, photocatalysis