Pr掺杂TiO2光催化剂的制备及其对酸性品红降解反应的催化性能  

Preparation and Catalytic Activity for Degradation of Acidic Fuchsine of TiO_2 Photocatalyst

作　　者：杨武[1] 郭昊[1] 张文皓[1] 薛再兰[1] 成莉燕[1] 薄丽丽[1] 高锦章[1] 

机构地区：[1]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃兰州730070

出　　处：《光谱学与光谱分析》2008年第4期922-925,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20475044);生态环境相关高分子材料教育部重点实验室学术带头人基金项目;西北师范大学知识与科技创新工程项目(KJCX-01)资助

摘　　要：以钛酸四丁酯为前躯物,采用溶胶-凝胶法制备了掺杂不同含量Pr的TiO2光催化剂,利用XRD,TG-DTA,AFM,UV-Vis,FTIR等手段对催化剂进行了表征。并通过酸性品红光催化降解实验对其光催化性能进行了评价,考查了实验条件,如催化剂用量,烧结温度,掺杂量等对催化剂催化活性的影响。Pr2O3的掺杂阻碍了TiO2晶相由锐钛矿型向金红石型的转变,使TiO2的粒径减小,比表面积增大,催化活性增强。当Pr掺杂量为0.8%,催化剂用量为0.03g,烧结温度为500℃时,酸性品红的降解率达到97%以上,酸性品红的降解反应为准一级反应。In the paper, undoped and Pr2O3 doped TiO2 nanoparticles were prepared by a sol-gel process using Ti（OC4 H9 ）4 as raw material and characterized by means of XRD TG-DTA, AFM, UV-Vis and FTIR. The photocatalytic activity of Pr2O3/ TiO2 was evaluated by the photocatalytic degradation of acidic fuchsine. The factors affecting on photocatalytic activity of Pr2O3 / TiO2, such as the content of doped Pr2O3, the calcined temperature and added amount of the catalyst etc. were discussed. It was shown that Pr doping hampers the transformation of TiO2 crystal phase from anatase to futile, and with Pr2O3 doping the particle diameter of Pr2O3/ TiO2 samples decreased, the specific surface area increased and the photocatalytic activity improved. When doping amount of Pr is 0. 8%, added amount of the catalyst is 0. 03 g and the calcination temperature is 500℃, the degradation efficiency of acidic fuchsine reaches 97%. The photocatalytic degradation of acidic fuchsine by Pr2O3/TiO2 is a quasi-first order dynamic reaction.

关 键 词：光催化 氧化钛 酸性品红 掺杂 降解 

分 类 号：O643[理学—物理化学]