电催化产生H_2O_2和·OH机理及在有机物降解中的应用

MECHANISM OF PRODUCTING H2O2 AND ·OH BY ECS AND ITS APPLICATION TO ORGANISM DEGRADATION

采用自制的电催化装置研究了苯酚、苯胺和邻苯二甲酸二甲酯有机物降解机理，证实了在有机物电催化降解过程中活性物种Ｈ２Ｏ２和·ＯＨ的存在。实验结果表明，有机污染物去除效率的关键在于体系产生活性中间体的量，在本实验条件下，可用体系产生Ｈ２Ｏ２的量来衡量电催化效率的大小。体系产生的Ｈ２Ｏ２水平高，相应有机污染物去除效率愈高，而且仅当体系产生的Ｈ２Ｏ２大于０．３ｍＬ／Ｌ时，有机物去除效率才有明显的提高。

Three types of organic pollutant, phenol, phenylamine, and dimethyl phthalate as the objects of the catalytic degradation were researched by ECS. The existence of H2O2 and ·OH was verified. The results showed that the key of removal efficiency depended on the activated intermediates yield for ECS. Electrically catalytic degradation efficiency was evaluated by H2O2 yeild in our ECS. When H2O2 yield was high, the corresponding organics removal efficiency reached, moreover, only when H2O2 yield was more than 0.3ml·l-1,the removal efficiency of pollutants heightened obviously.