金属共掺杂对TiO_2光催化性能的影响  

Influence of Codoping of Metals on the Photo-Catalytic Activity of TiO_2

作　　者：王剑波[1] 张景来 卢寿慈[2] 

机构地区：[1]安徽理工大学化学工程系,安徽淮南232001 [2]北京科技大学环境工程系,北京100083

出　　处：《安徽理工大学学报（自然科学版）》2004年第3期61-64,共4页Journal of Anhui University of Science and Technology:Natural Science

摘　　要：采用sol-gel法制备了Fe3+-Ce4+、La3+-Ce4+共掺杂TiO2光催化剂,以对水溶液中RhodamineB的降解考察其光催化活性。XRD结果表明,制备的催化剂为锐钛矿型。共掺杂催化剂的光活性均高于单掺杂催化剂,La3+-Ce4+共掺杂TiO2光催化剂光活性高于Fe3+-Ce4+共掺杂TiO2光催化剂。荧光光谱(PL)结果表明,La3+-Ce4+共掺杂TiO2光催化剂有较弱的荧光强度,说明光催化活性与荧光强度具有负相关性。Titanium dioxide photo-catalysts co-doped with Fe^3+ -Ce^4+ and La^3+-Ce^4+ by using the sol-gel method were prepared to evaluate the photo-catalytic activities of its degradation of Rhodamine B in solution. The results of XRD showed that the crystal's structure is the type of anatase. The photo-catalytic activity of the catalyst co-doped by metal is higher than that of single-doped, especially, the activity of TiO_2 co-doped La^3+ and Ce^4+ is higher than that of TiO_2 co-doped Fe^3+ and Ce^4+. The result of PL shows that the PL intensity of TiO_2 co-doped La^3+ and Ce^4+ is weaker than that of TiO_2 co-doped Fe^3+ and Ce^4+ It indicates that the photo-catalytic activity has negative correlativity with PL intensity.

关 键 词：TIO2 光催化剂 改性 

分 类 号：X178[环境科学与工程—环境科学]