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Gd掺杂锐钛矿型TiO2光催化剂的制备及降解苯甲羟肟酸活性
作者:祝思频1 2 王春英1 2 3 王俊蔚1 2 罗仙平1 2 3 
单位:1. 江西理工大学资源与环境工程学院 江西 赣州 341000 2. 江西省矿冶环境污染控制重点实验室 江西 赣州 341000 3. 西部矿业股份有限公司博士后科研工作站 西宁 810000 
关键词:二氧化钛 光催化剂 掺杂改性 钆掺杂 苯甲羟肟酸 
分类号:X703.1
出版年,卷(期):页码:2017,45(10):0-0
DOI:
摘要:

 以溶胶?凝胶法制备了不同煅烧温度及不同Gd掺杂量的TiO2(TiO2:x%Gd)粉末。对改性前后TiO2结构和性能进行了表征,研究了Gd掺杂TiO2粉末在紫外光下对苯甲羟肟酸的光催化性能。结果表明:相比纯TiO2,适量Gd掺杂使TiO2的光吸收强度增大、粒径减小且比表面积增大。掺杂后的TiO2粉末具有很高的光催化活性,500 ℃煅烧的TiO2:0.70%Gd催化剂光催化活性最佳,室温下300 W汞灯照射120 min后,对苯甲羟肟酸的降解率高达94.7%。总有机碳(TOC)测试显示,加入TiO2:0.70%Gd后,苯甲羟肟酸矿化率达79.3%,苯甲羟肟酸降解后可能转化为有机小分子物质及无机CO2和NO3−等。此外,Gd掺杂TiO2重复使用4次后,苯甲羟肟酸的光催化降解率无明显降低,表明稀土Gd掺杂TiO2是一种有效稳定的光催化剂。

 
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