镧掺杂对TiO_2薄膜性能的影响  

Effect of La Doping on the Properties of TiO_2 Thin Film

作　　者：尹荔松[1] 谭敏[1] 陈永平[1] 李婷[1] 范海陆[1] 

机构地区：[1]中南大学物理科学与技术学院,长沙410083

出　　处：《世界科技研究与发展》2007年第5期1-5,31,共6页World Sci-Tech R&D

基　　金：中国博士后基金资助项目(20060390878)

摘　　要：用sol-gel法于玻璃表面制备了镧掺杂纳米TiO2薄膜。利用X射线衍射仪(XRD)、原子力显微镜(AFM)对其进行了表征。通过接触角测量仪测量亲水角来表征其亲水性能,并根据紫外光照射下亚甲基蓝溶液的光催化降解率评价其光催化性能。研究了镧掺杂量、热处理温度对纳米TiO2薄膜亲水性能和光催化效果的影响。研究发现,镧掺杂可以提高TiO2薄膜的亲水性能并且在黑暗条件下能将亲水性保持更长一段时间;镧掺杂可以提高TiO2薄膜的光催化效率,扩展TiO2薄膜的光谱吸收范围。The lanthanum-doped TiO2 thin films on glass surface were prepared by sol-gel method. The effect of La doping was studied by XRD and AFM. The hydrophilieity and photocatalytie activities were evaluated by water contact angle and photodegradation rate of methlynen blue. The influence of variant doping amount of lanthanum （La） and calcination temperature on hydrophilicity and photocatalytic efficiency were studied. The results show that doping with La could enhance the hydrophilicity of TiO2 thin fdms and keep the hydrophilicity for a long time under dark environment. In addition, Ladoped TiO2 will improve the photocatalytic efficiency and extend the spectrum absorption range of TiO2 thin films.

关 键 词：TIO2 薄膜 掺杂 亲水性 光催化 红移 

分 类 号：O614.411[理学—无机化学]