镧掺杂二氧化钛光催化剂的制备及催化降解莠去津废水性能研究  

Preparation of La-doped TiO2 Photocatalyst and its Performance in Degradation of Atrazine Wastewater

作　　者：张新海[1] ZHANG Xinhai(Hebi Polytechnic,Hebi 458030,China)

机构地区：[1]鹤壁职业技术学院,河南鹤壁458030

出　　处：《化工技术与开发》2020年第5期64-67,共4页Technology & Development of Chemical Industry

基　　金：鹤壁职业技术学院2018年度校本科研科技类重点课题(2018-KJZD-004)。

摘　　要：采用溶胶-凝胶法制备了镧掺杂二氧化钛光催化剂,考察了光照条件、焙烧温度、焙烧时间、镧掺杂量、催化剂用量等因素对光催化降解莠去津效率的影响,并与纯二氧化钛进行了性能对比。结果表明,在焙烧温度500℃、焙烧时间2.5h、镧掺杂量0.5%、催化剂用量2.5g·L-1的最佳实验条件下,该催化剂在紫外光照射下处理莠去津废水的催化降解效率可达80%;在二氧化钛中掺入镧,可以显著提升催化剂的性能。La-doped TiO2 photocatalyst was prepared by sol-gel method. The effects of light conditions, calcination temperature, calcination time, La-doping amount and catalyst amount on the efficiency of photocatalytic degradation of atrazine were investigated, and compared with pure TiO2. The results showed that the optimum conditions were: 500℃, 2.5 h, 0.5% La-doped and 2.5 g/L catalyst. The degradation efficiency of the catalyst in the treatment of atrazine wastewater under UV irradiation was up to 80%. At the same time, the performance of the catalyst could be significantly improved by La-doped into TiO2.

关 键 词：镧掺杂 二氧化钛 光催化降解 莠去津 废水 

分 类 号：X786[环境科学与工程—环境工程]