Cd/CdS光催化降解甲基橙的研究  

A study on photocatalytic degradation of methyl orange by Cd/CdS

作　　者：崔玉民[1] 范少华[1] 

机构地区：[1]阜阳师范学院化学系,安徽阜阳236032

出　　处：《功能材料》2005年第6期859-861,868,共4页Journal of Functional Materials

基　　金：安徽省教育厅自然科学基金资助项目(2004kj303);安徽省"十五"优秀人才--安徽省高校中青年学科带头人培养对象计划经费资助项目(2003YD022)

摘　　要：采用胶体化学法制备表面富镉的Cd/CdS纳米粒子为催化剂对水溶液中甲基橙的光催化降解进行了研究。探讨了光催化反应机理,讨论了光催化剂用量,双氧水的用量,试液的pH值,光照时间与甲基橙脱色率的关系。实验结果表明,当甲基橙起始浓度为20mg/L,Cd/CdS用量为0.500g,双氧水用量为5.88mmol/L,pH值为7.0时,光照6h,甲基橙的脱色率可达到95.5%。In this article,photocatalytic degradation of methyl orange in aqueous solution has been studied with surface Cd-rich CdS nanoparticles which were prepared by colloid chemistry process. Reaction mechanism of photocatalysis was probed. The relationships between quantity of photocatalyst,quantity of H_2O_2,pH values, illumination time and the decolorizing efficiency of methyl orange were discussed. The results show that the decolorizing efficiency of methyl orange can reach 95.5% by using Cd/CdS as heterogeneous photocatalyst,with initial concentration of methyl orange=20mg/L,the quantity of catalyst=0.500g,quantity of H_2O_2=~5.88 mmol/L, pH=7.0, illumination time=6h.

关 键 词：光催化降解 甲基橙 CDS 表面富镉 

分 类 号：O643[理学—物理化学]