负载型AgBr/CaWO_4催化剂的制备及其可见光催化活性  

Preparation and Visible Light Photocatalytic Activity of Supported AgBr/CaWO_4 Catalyst

作　　者：林海莉[1] 曹静[1] 罗邦德[1] 鞠廷勇[1] 陈士夫[1] 

机构地区：[1]淮北师范大学化学与材料科学学院,安徽淮北235000

出　　处：《影像科学与光化学》2010年第5期368-375,共8页Imaging Science and Photochemistry

基　　金：国家自然科学基金(20973071);安徽省教育厅自然科学基金(KJ2008B100ZC);安徽省"含能材料"省级重点实验室科研基金(KLEM2009013)资助项目

摘　　要：采用化学取代的方式将AgBr负载到Ca WO4载体上形成新型的AgBr/Ca WO4复合结构光催化剂.利用XRD、SEM和UV-Vis对AgBr/Ca WO4催化剂进行了表征.在可见光条件下(500 W、λ>420 nm)研究了AgBr的负载量、催化剂用量对甲基橙(MO)溶液的催化降解性能.结果表明,AgBr/Ca WO4在可见光下表现出良好的催化活性,甲基橙溶液的降解遵从假一级动力学方程.AgBr的负载量和催化剂用量分别增加时,AgBr/Ca WO4催化剂对甲基橙的催化活性增强,均趋向于最大值.Novel AgBr/CaWO4 composite catalyst was synthesized by loading AgBr on CaWO4 substrate via ion exchange method. AgBr/CaWO4 was characterized by XRD, SEM and UV-Vis technology. The effect of loaded amount of AgBr and AgBr/CaWO4 amount on the degradation efficiency of methyl orange （MO） was studied under visible light irradiation condition （500 W, λ〉420 nm）. The results showed that AgBr/CaWO4 displayed good photocatalytic activity and the degradation process of MO solution obeyed the pseudo-firstorder kinetics equation. The photocatalytic activity of AgBr/CaWO4 for MO increased and tended to a maximal value with increasing the AgBr loaded amount, as well as AgBr/CaWO4 amount.

关 键 词：可见光催化 甲基橙 AgBr/CaWO4光催化剂 

分 类 号：O643.36[理学—物理化学]