铂铈共掺杂纳米TiO_2的制备、表征及光催化性能  

Preparation,characterization and photocatalytic performance of platinum and cerium-codoped TiO_2

作　　者：杜鹏[1] 赵振波[1] 陈刚[1] 

机构地区：[1]长春工业大学化学与生命科学学院,长春130012

出　　处：《环境工程学报》2013年第10期3933-3938,共6页Chinese Journal of Environmental Engineering

基　　金：吉林省科技发展计划项目(20080550);吉林省教育厅"十二五"科学技术研究项目(吉教科合字[2011]第91号)

摘　　要：以钛酸四丁酯为前驱体,过氧化氢为氧化剂,采用简单易行的低温氧化法制备出晶粒尺寸较小(平均尺寸25nm)的二氧化钛纳米粒子。通过贵金属Pt掺杂TiO2(Pt-TiO2)、稀土元素Ce掺杂TiO2(Ce-TiO2)和Pt、Ce共掺杂TiO2(Pt/Ce-TiO2)的掺杂的方法对二氧化钛进行改性。通过XRD,XPS,TEM,紫外漫反射等表征手段对制备的样品进行表征。通过可见光下降解罗丹明B来测试其光催化活性。实验结果表明,由Ce掺杂的TiO2光催化剂对有机污染物的最大降解能力略大于Pt掺杂的TiO2,2种元素进行共同掺杂时对应的TiO2光催化剂降解能力最大。Smaller titanium dioxide nanoparticles （ average size 25 nm） were synthesized by a low temper- ature oxidation process simply. Afterwards, the properties of titanium dioxide were improved via doping with vari- ous Pt and Ce contents. Pt-TiO2, Ce-TiO2 and Pt/Ce co-doped TiO2 nanocomposites were obtained. The pre- pared photocataiysts were systematically characterized by X-ray diffraction, TEM, UV-vis diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy. Finally photocatalytic activitives of prepared materials were tested in visible light range to decomposition of Butyl rhodamine. It was observed that the maximum degradation ability of Ce-TiO2 is greater than Pt-TiO2 for organic pollutants, the two elements co-doped TiO2 degradation abil- ity is the largest.

关 键 词：共掺杂 光催化 有机污染物降解 

分 类 号：X703.1[环境科学与工程—环境工程]