稀土掺杂TiO2的光催化性能研究
Study on Photocatalytic Performance of Rare-Earth Doped TiO2
路君凤 1赵鑫 1王欢1
作者信息
- 1. 辽宁工业大学 化学与环境工程学院,辽宁 锦州 121001
- 折叠
摘要
以钛酸丁酯、无水乙醇、冰乙酸为原料,以罗丹明 B 为模拟有机污染物,采用溶胶-凝胶法制备了一系列的TiO2 光催化剂,并利用XRD和物理吸附对催化剂进行了表征.考察了原料配比、凝胶时间、稀土掺杂种类、稀土掺杂量对TiO2 光催化罗丹明B性能的影响.结果表明:当钛酸比为 1.5∶1、钛醇比为 2∶1、凝胶时间为48 h、Pr掺杂量为2%时,TiO2 光催化罗丹明B的降解率最好.在光催化条件为罗丹明B初始质量浓度为4 mg·L-1、催化剂质量0.05 g、光反应时间6 h时,罗丹明B的降解率达93.23%.
Abstract
A series of TiO2 photocatalysts were prepared by sol-gel method with butyl titanate,anhydrous ethanol and glacial acetic acid as raw materials and Rhodamine B as simulated organic pollutants.The catalysts were characterized by XRD and nitrogen adsorption-desorption.The effects of raw material ratio,gel time,rare earth doping type and rare earth doping amount on the photocatalytic performance of Rhodamine B by TiO2 were investigated.The experimental results showed that TiO2 photocatalytic degradation of Rhodamine B was the best when the ratio of butyl titanate to glacial acetic acid was 1.5∶1,the ratio of butyl titanate to anhydrous ethanol was 2∶1,gelling time was 48 h,Pr doping amount was 2%.When the initial mass concentration of Rhodamine B was 4 mg·L-1,the catalyst weight was 0.05 g and the photoreaction time was 6 h,the degradation rate of Rhodamine B reached 93.23%.
关键词
二氧化钛/稀土金属/光催化剂Key words
Titanium dioxide/Rare earth metals/Photocatalyst引用本文复制引用
基金项目
辽宁工业大学创新创业训练计划(X2021049)
出版年
2024
NETL
NSTL
万方数据