具有可见光响应混晶TiO_2光催化剂的制备及光催化性能研究  

Preparation and photocatalyst properties of mixed-phase TiO_2 with visible light response

作　　者：石凯[1] 韩丽花 李孟宇 李巧玲[1] SHI Kai;HAN Li-hua;LI Meng-yu;LI Qiao-ling(School of Science,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学理学院,山西太原030051

出　　处：《应用化工》2019年第3期578-581,共4页Applied Chemical Industry

基　　金：山西省回国留学人员科研资助项目(2014-重点6);中北大学研究生科技立项(20171447)

摘　　要：采用一步水热法制备锐钛矿/金红石TiO_2混合晶体,探讨锐钛矿相和金红石相比例对光催化降解罗丹明B的性能影响以及混晶TiO_2的光催化机理。结果表明,当金红石相的比例为20%,TiO_2混晶在紫外辐射和太阳光下,使初始浓度10 mg/L的罗丹明B完全降解的时间分别为50 min和150 min;活性物捕捉实验证明,·OH为催化体系中的关键活性物质。Mixed crystal TiO2 (anatase/rutile) was prepared by one step hydrothermal method.The effects of the proportion of anatase and rutile on the performance of photocatalytic degradation of Rh B and the photocatalytic mechanism of mixed crystal TiO2 were investigated with Rhodamine B as a simulated pollutant.Results show that,when the rate of rutile phase is 20%,the time that Rhodamine B(~10 mg/L) completely degraded in under ultraviolet light irradiation(~60 W) and natural light is 50 min and 150 min ,respectively.· OH is the key active substance in the catalytic system.

关 键 词：TIO2 混晶 水热法 光催化 荧光 

分 类 号：TQ134.1[化学工程—无机化工] O641.2[理学—物理化学]