摘要
以钛酸丁酯、硝酸铋、硝酸镧为主要原料,溶胶-凝胶法分别制备了TiO2、TiO2-Bi2O3、TiO2-La2O3和TiO2-Bi2O3-La2O3等催化剂。用XRD、TEM等方法对其进行了表征,晶型均为锐钛矿,粒径范围10～25 nm。以罗丹明B为目标降解物,分别考察了催化剂的光、电催化活性。结果表明,在紫外光照下,TiO2-Bi2O3-La2O3的光催化活性最高,60 min时罗丹明B的降解率达98.7%,较纯TiO2光催化活性提高了162%;以负载TiO2-Bi2O3-La2O3的多孔材料为粒子电极,采用三维电极法降解罗丹明B,20 min时的降解率达98.6%,较使用负载纯TiO2粒子电极提高了9%。
TiO2, TiO2-Bi2O3, TiO2-La2O3 and TiO2-Bi2O3-La2O3 catalysts were prepared form Ti （OC4H9）4 ,Bi（ NO3 ）3 and La（NO3）3 as major raw materials using sol-gel process, The products were characterized by XRD and TEM. The results show that all of them are anatase with particle size in the range of 10 ～ 25 nm. The photocatalytic and electrocatalytic activities of the catalysts were evaluated by method of catalytic degradation of rhodamine-B. The photocatalytic activity of TiO2-Bi2O3-La2O3 was the highest. With this photo catalyst,the degradation rate of rhodamine-B was 98.7 % under UV-light irradiation after 60 min,which is 162% higher than the activity of pure TiO2. With porous particle- electrode supported by TiO2-Bi2 O3-La2O3, the degradation rate of rhodamine-B was 98.6 % using three - dimensional electrode process after 20 min, which is 9 % higher than the activity of porous particle- electrode supported by pure TiO2.
出处
《精细化工》
CAS
CSCD
北大核心
2008年第6期532-535,共4页
Fine Chemicals
基金
江苏省高校自然科学计划项目(06KJD530153)
江苏省南通市应用研究计划项目(K2006017)~~
作者简介
丁欣宇（1975-），男，江苏通州人，讲师，硕士，主要从事精细化学品和功能材料的研究，电话：0513—85015495，E—mail：ding．xyu@ntu．edu.cn。
联系人：景晓辉（1960-）男，江苏南通人，教授，东华大学在读博士，师从蔡再生教授（博导），研究方向：光电催化理论与应用，电话：0513-85015495，E-mail：jing．xh@ntu．edu．cn。
