Zr和N共掺杂TiO2的制备、表征及其光催化性能

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3h后对甲基橙的降解率比纯TiO2提高32%。

Preparation, characterization and photocatalysis of TiO2 co-doped with zirconium and nitrogen

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.