二氧化钛光催化剂的制备及其性能研究

Preparation of Titanium Dioxide and The Study on Its Properties

本文采用溶胶-凝胶法(sol-gel)制备了纯相和掺杂不同量Fe3+、Zn2+、Cu2+和S2-的TiO2粉体,并讨论了不同热处理温度、掺杂元素及掺杂量对TiO2粉体光催化性能的影响。以甲基橙溶液为目标降解物,用紫外可见分光光度计对TiO2粉体的光催化性能进行测定。实验结果表明,煅烧温度为450℃、掺入0.25%的Zn2+的TiO2粉体的催化效果最好。

In this paper, the pure and Fe^3＋-doped, Zn^2＋-doped, Cu^2＋-doped and S^2＋-doped TiO2 powders were prepared by thesol-gel method. The influences of the different temperature, doping elements and doping amounts on photocatalytic activities of the prepared catalysts were discussed. The photocatalytic properties of titanium dioxide powders to methyl orange is determined by UV-visible spectrophotometer. The results of the experiment showed that the Zn^2＋-doped powders had the highest photocatalytic activity when the doping amount was 0.25% and the sintering temperature is 450℃.