铈离子光催化降解茜素绿的性能和机理  

Activity and mechanism of photocatalytic degradation of Alizarin Green by cerium ions

作　　者：钟恒[1] 曹文彪[1] 熊重铎[1] 夏东升[1] 曾庆福[1] 徐爱华[1] 

机构地区：[1]武汉纺织大学环境工程学院,武汉430200

出　　处：《环境工程学报》2014年第2期448-452,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50978208)

摘　　要：主要研究了简单铈离子(Ce3+)在紫外光(UV)的作用下对蒽醌染料茜素绿(AG)的光催化降解效果和反应机理。结果表明,UV/Ce3+体系能够有效降解AG,初始反应速率随AG浓度的倒数值和Ce3+浓度的增加而线性增加,随初始溶液pH的增加先降低后增加,在酸性条件下有很高的TOC去除率。荧光探针实验表明,反应过程中可以产生·OH自由基。UV/Ce3+体系对其他类型染料和对硝基苯酚都有较好的降解效果。The effect and mechanism of anthraquinone dye alizarin green （AG） degradation by Ce3＋ ions under UV irradiation were studied. It was found that the dye could be degraded efficiently by the UV/Ce3＋ sys- tem. The initial reaction rate increased linearly with the increasing of the inverse value of AG concentration and Ce3 ＋concentration, respectively ; while with the initial pH of the solution increasing, it first decreased dramatic- ally and then increased slowly. A high TOC removal rate was obtained under acid conditions. The fluorescent ex- periments showed that · OH radicals was produced during AG degradation. The UV/Ce3＋ system was also effi- cient for degradation of other organic dyes and p-nitrophenol.

关 键 词：铈离子 光催化 茜素绿 降解 羟基自由基 

分 类 号：X703.1[环境科学与工程—环境工程]