溶胶-凝胶法制备废水处理用光催化剂Sm_2InNbO_7  

Preparation of Photocatalyst Sm_2InNbO_7 for Wastewater Treatment by Sol-Gel Method

作　　者：马晨霞[1] 叶红齐[1] 唐新德[1] 赵智[1] 李煜静[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《化工环保》2010年第4期360-363,共4页Environmental Protection of Chemical Industry

摘　　要：以Sm(NO3)3、In(NO3)3和Nb2O5为原料,利用溶胶-凝胶法合成具有烧绿石型结构的光催化剂Sm2InNbO7(光催化剂)。考察了光催化剂的结构及性能。实验结果表明:当合成pH为4、焙烧温度为850℃时,可制得比表面积为6.02m2/g的高结晶度的烧绿石结构光催化剂;当催化剂加入量为2.0g/L,可见光催化反应14h亚甲基蓝的降解率可达97.5%。The photocatalyst Sm2InNbO7 with pyrochlore-type structure was synthesized by sol-gel method using Sm(NO3)3,In(NO3)3 and Nb2O5 as raw materials.The structure and performance of the photocatalyst were studied.The experimental results show that: When the synthesis pH is 4 and the calcination temperature is 850 ℃,the photocatalyst with high crystallinity,pyrochlore-type structure and 6.02 m2/g of specific surface area can be prepared;When the photocatalyst dosage is 2.0 g/L and the visible-light photocatalytic...

关 键 词：光催化 催化剂 溶胶-凝胶法 烧绿石结构 废水处理 

分 类 号：X703[环境科学与工程—环境工程]