氧化亚铜光催化降解对硝基苯酚  

SOLAR PHOTOCATALYTIC DEGRADATION OF p-NITROPHENOL ASSISTED BY CUPROUS OXIDE

作　　者：刘洪禄[1] 张爱茜[1] 吴海锁[1] 黄智[1] 王连生[1] 

机构地区：[1]南京大学环境学院,污染控制与资源化国家重点实验室,南京210093

出　　处：《环境化学》2004年第5期490-494,共5页Environmental Chemistry

基　　金：863项目 ( 2 0 0 2AA6491 3 0 );江苏省自然科学基金 (BK2 0 0 1 40 7);江苏环境工程重点实验室资助

摘　　要：采用生物效应灯模拟自然光源 ,研究氯化亚铜水解法制备的超细颗粒Cu2 O对对硝基苯酚的光催化降解作用 .结果表明 ,1 1 2mg·l- 1 ,2 2 4mg·l- 1 和 44 8mg·l- 1 对硝基苯酚 1 0h的降解率均达到 90 % ,降解反应符合一级反应动力学 ,且 7次重复使用试验显示 ,催化剂的使用寿命比硼氢化钠法制备的催化剂明显延长 ,降解的主要中间产物为对苯醌与对苯二酚 .Fine particles of cuprous oxide(Cu 2O)were prepared from the hydrolysis of cuprous chloride(CuCl)and applied as photocatalyst in the heterogeneous photocatalytic degradation of p-nitrophenol.Under the irradiation of an artificial solar device,the degradation efficiencies of p-nitrophenol solutions of 11.2mg·l -1 ,22.4mg·l -1 and 44.8mg·l -1 exceeded 90% after 10h irradiation,while the degradation process was in accordance with first order reaction characteristics.Moreover,the catallyst was reused in seven cycles with slight decrease in photocatalytic capacity,showing longer working time compared with that prepared by NaBH 4 reduction method.Besides,the major intermediates of the heterogeneous photocatalytic degradation for p-nitrophenol were p-benzoquinone and hydroquinone.

关 键 词：对硝基苯酚 光催化降解 一级反应动力学 降解率 中间产物 降解反应 生物效应 钠法 制备 氯化亚铜 

分 类 号：O643.3[理学—物理化学]