Pt／TiO2纳米粒子的制备及其光催化性能研究  

Studies on the preparation of Pt/TiO2 nanoparticles and its photocatalytic performance

作　　者：刘秀华[1] 邓义[1] 龙素群[1] 傅依备[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

出　　处：《功能材料》2007年第A07期2407-2411,共5页Journal of Functional Materials

基　　金：中国工程物理研究院科学技术基金资助项目（20050546）

摘　　要：采用溶胶-凝胶法制备了掺杂Pt的TiO2粉末，利用紫外可见光谱对粉末的光吸收性能进行了表征，并分别在模拟日光和可见光下考察了其光催化氧化对．硝基苯酚的活性。结果表明，掺杂Pt以后TiO2粉末的光谱吸收范围被拓展至可见光，光催化活性也明显提高。在模拟日光照射下，以光催化活性较好的Pt／TiO2粉末为催化剂降解对．硝基苯酚，4h后对-硝基苯酚的转化率为93．7％，其反应是一级反应。The Pt-doped TiO2 powders were prepared by the sol-gel method. The light absorption performance was characterized by UV-Vis absorption spectroscopy, and the photocatalytic activities for the degradation of p-nitrophenol under simulant sunlight and visible light were respectively investigated too. The results showed that the photon excited wavelength of TiO2 powder was broaden to visible light and the photocatalytic activitity of TiO2 powder was improved after doped with platinum. The photocatalytic activitity of Pt/TiO2 powder calcined at 773K was better, under which the conversion rates of p-nitrophenol was 93.7% when irradiated for 4hs, and the photocatalytic degradation of p-nitrophenol follows first order kinetics under the irradiation of simulant sunlight.

关 键 词：PT 二氧化钛 粉末 光催化活性 

分 类 号：O612.4[理学—无机化学] TQ031[理学—化学]