(1. 南华大学 公共卫生学院，衡阳 421001； 2. 衡阳师范学院 化学与材料科学系，衡阳 421008； 3. 南华大学 化学化工学院，衡阳 421001)
摘 要: 利用水解沉淀法制备TiO2、N-TiO2、Zr-TiO2以及Zr和N共掺杂的纳米TiO2，用TEM、XRD、XPS和UV-Vis-DRs等方法对光催化剂的结构、元素组成和对可见光的响应等性能进行表征，并以甲基橙为目标降解物，测试其光催化降解效果。结果表明，Zr掺杂能够降低TiO2光催化剂的粒径；Zr和N共掺杂可以起到协同作用，提高样品的光催化活性，同时增强样品在可见光区的响应。Zr和N共掺杂TiO2在高压汞灯光照下比TiO2具有更好的光催化效果，2%Zr和N共掺杂TiO2光照3 h后对甲基橙的降解率比纯TiO2提高32%。
关键字: 纳米TiO2；掺杂；光催化；水解沉淀法；甲基橙
（1. School of Public Health, University of South China, Hengyang 421001, China; 2. Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China; 3. School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China）
Abstract:TiO2, N-TiO2, Zr-TiO2 and Zr-N codoped TiO2 were prepared by hydrolyzation- precipitation method. Crystal structure, elemental composition and visible lights response of prepared samples were characterized by XRD, TEM, XPS, and UV-Vis-DRs, and its photocatalysis properties were studied by photocatalytical degradation of methyl orange. The results indicate that Zr doping could decrease the particle size of nanoparticles, and Zr-N co-doping has a synergistic effect that could improve the photocatalysis efficiency and the visible absorption capacity of samples. Zr-N co-doped TiO2 has higher photo-catalysis activity than TiO2 under a 250 W high pressure mercury lamp and the degradation efficiency of methyl orange for 2% Zr-N co-doped TiO2 has a 32% rise than pure TiO2 after 3 h illumination.
Key words: nano TiO2; doping; photocatalysis; hydrolyzation-precipitation method; methyl orange
