La3＋掺杂TiO2的制备及光催化性能研究  

Preparation of La^(3+)-doped TiO_2 and Its Photocatalytic Performance

作　　者：李敏娇[1] 张述林[2] 卢燕[1] 余鸿[1] 朱伟[1] 

机构地区：[1]绿色催化四川省高校重点实验室四川理工学院化学与制药工程学院,四川自贡643000 [2]四川理工学院材料与化学工程学院,四川自贡643000

出　　处：《钢铁钒钛》2014年第1期32-35,共4页Iron Steel Vanadium Titanium

基　　金：绿色催化四川省高校重点实验室资助项目(No.LYJ03、No LYJ1203);四川理工学院学科建设项目

摘　　要：采用溶胶-凝胶法制备了La3+掺杂的TiO2光催化剂(La/Ti原子比分别为1/100,2/100,3/100,4/100和5/100)。用比表面(BET)、X射线粉末衍射(XRD)、紫外可见漫反射光谱(DRS)和表面光电压谱(SPS)对所制备的光催化剂进行了表征。结果表明,La3+掺杂量为4%(La/Ti原子比)时所制备的TiO2具有最高电子-空穴分离效应。以甲基橙为模拟偶氮染料对所制备光催化剂的脱色性能进行考察,光催化脱色结果显示La3+掺杂量为4%时所制备的TiO2具有最高的光催化活性。La3＋ -doped TiO2 with different molar ratios of La/Ti （1/100, 2/100, 3/100, 4/100 and 5/ 100） were prepared by a facile Sol-Gel method. The photocatalysts prepared were characterized by Brunauer-Emmet-Teller （BET） method, X-ray diffraction （XRD） , UV-Vis diffuse reflectance spectra and surface photovoltage spectra （SPS）. The results showed that TiO2 doped with 4% （the molar ratio of La/Ti） of La3~ had the highest photoinduced charge separation rate. The decolorizing performances of TiO2 and La3 ＋ -doped TiO2 was evaluated respectively by using aqueous methyl orange solution as simula- tive azo dye, and it could be concluded that the TiO2 doped with 4% of La3＋ has the best photocatalytic performance.

关 键 词：TIO2 光催化 掺杂 La3+ 

分 类 号：TQ426[化学工程]