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负载型AgBr/CaWO_4催化剂的制备及其可见光催化活性
引用本文:林海莉,曹静,罗邦德,鞠廷勇,陈士夫.负载型AgBr/CaWO_4催化剂的制备及其可见光催化活性[J].影像科学与光化学,2010,28(5).
作者姓名:林海莉  曹静  罗邦德  鞠廷勇  陈士夫
作者单位:淮北师范大学,化学与材料科学学院,安徽,淮北,235000
基金项目:国家自然科学基金,安徽省教育厅自然科学基金,安徽省"含能材料"省级重点实验室科研基金 
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、λ420 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.

关 键 词:可见光催化  甲基橙  AgBr/CaWO4光催化剂

Preparation and Visible Light Photocatalytic Activity of Supported AgBr/CaWO4 Catalyst
LIN Hai-li,CAO Jing,LUO Bang-de,JU Ting-yong,CHEN Shi-fu.Preparation and Visible Light Photocatalytic Activity of Supported AgBr/CaWO4 Catalyst[J].Imaging Science and Photochemistry,2010,28(5).
Authors:LIN Hai-li  CAO Jing  LUO Bang-de  JU Ting-yong  CHEN Shi-fu
Abstract: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-first-order 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.
Keywords:visible light photocatalysis  methyl orange  AgBr/CaWO4 photocatalyst
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