La掺杂纳米TiO2的制备及其光催化性能  

Preparation and Photocatalytic Activity of La-doped TiO2 Nano-particles

作　　者：谷科成[1] 胡相红[2] 陈勇[1] 张恒[1] 陈逸[1] 

机构地区：[1]后勤工程学院营房管理与环境工程系,重庆401311 [2]武警北京指挥学院实验中心,北京100012

出　　处：《后勤工程学院学报》2009年第6期54-58,共5页Journal of Logistical Engineering University

基　　金：重庆市自然科学基金资助项目(CSTC,2008BB7139);后勤工程学院学术创新基金资助(200502)

摘　　要：采用溶胶-凝胶法制备了镧掺杂TiO2粉体材料，利用DSC—TG和XRD进行了结构表征，以TNT为目标降解物研究了其光催化性能。结果表明，La掺杂抑制了TiO2的晶粒增长和晶型的转变，适量的La掺杂提高了TiO2的光催化活性，La掺杂量（摩尔分数）为2％时光催化活性最佳，La掺杂过量会降低其光催化活性。La-doped TiO2 nano-particles were prepared by sol-gel method and characterized by DSC-TG and XRD. The photocatalytic activity of La-doped TiO2 nano-particles were investigated through degradation of TNT. The results showed that doping of La restrained the growth of TiO2 crystallite and the crystalline phase transition. TiO2 with suitable La-doping exhibited high activity. The photocatalytic activity of TiO2 was best when the doping content of La was 2% in mole and debased when the doping content was excessive.

关 键 词：LA掺杂 二氧化钛 光催化 TNT 

分 类 号：O643.322[理学—物理化学]