铈离子光催化降解茜素绿的性能和机理简

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。

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

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⁺ system. 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 dramatically and then increased slowly. A high TOC removal rate was obtained under acid conditions. The fluorescent experiments showed that ·OH radicals was produced during AG degradation. The UV/Ce³⁺ system was also efficient for degradation of other organic dyes and p-nitrophenol.