中文摘要：

以稀土镧（La）为掺杂元素,采用浸渍法和溶胶凝胶法分别制备镧掺杂TiO2纳米光催化剂,用NO气体为污染源测试两种方法制备改性La-TiO2的晶相结构与光催化活性。结果表明,溶胶凝胶法较浸渍法制备得到光催化剂有粒径小、比表面积大的优点,且在La最佳掺量下,溶胶凝胶法制备的光催化剂对NO气体的降解率为60.1%,较浸渍法制备的光催化剂高出9.6%。

英文摘要：

Taking lanthanum（La） as doping elements,lanthanum doped TiO2 nano photocatalyst was prepared by impregnation method and sol-gel method,respectively. Taking NO gas as pollutants,crystal structure and photocatalytic activity of modified La-TiO2 prepcwed by two kinds of methods were tested. The results showed that the photocatalyst prepared by sol-gel method had the advantages of smaller particle size and larger specific surface area than the impregnation method,and under the optimum La content,the photocatalytic prepared by sol-gel method had the NO degradation rate of 60. 1%,which was 9. 6% higher than that prepared by impregnation method.