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研究论文

摘要：以太阳光、氙灯为光源,ZnO为光催化剂,对苯胺光降解行为进行研究,考察了溶液的初始浓度、催化剂量、溶液pH值对苯胺光降解速率的影响。实验结果证实苯胺光降解符合准一级动力学规律,氧不足的条件下苯胺降解的速率减慢。通过HPLC确定苯胺降解的主要中间产物是邻氨基酚、对氨基酚、羧酸类化合物。有机酸进一步氧化生成二氧化碳。在pH>6和pH<6两种条件下苯胺光降解途径不同,产物分别为不同的羧酸。

Abstract：The photocatalytic degradation of aniline in ZnO suspension with sunlight or xenon lamp has been studied. The effects of aniline initial concentration, catalyst amount and pH of solution on the photodegradation rate were investigated. The results indicates that the main pro ducts were o aminophenol, p aminophenol and carboxylic acids and the later will be oxidized into carbon dioxide further. The reaction accorded apparently with the first order kinetics, At conditions of pH>6 or pH<6 there are different degradation pathways producing different carboxylic acids. Without enough oxygen, the degradation rate was slow down.