N_2/Ar等离子体改性对CuO/TiO_2可见光光催化活性的影响  

Effect of N_2/Ar plasma treatment on the visible light photocatalytic activity of CuO/TiO_2

作　　者：罗正维[1] 江晖[1] 胡龙志 李丹[1] 耿文华[1] 韦萍[1] 

机构地区：[1]南京工业大学生物与制药工程学院,江苏南京211816

出　　处：《催化学报》2014年第10期1752-1760,共9页

基　　金：江苏省自然科学基金(BK2011808);江苏省高校自然科学研究项目(10KJB61005);教育部留学回国人员科研启动基金(教外司留[2011]1568号);南京工业大学青年教师学术基金(39707003)~~

摘　　要：研究了N2/Ar介质阻挡放电处理对负载CuO的TiO2可见光光催化活性的影响.采用X射线衍射、紫外-可见分光吸收光谱、透射电镜、X射线光电子能谱和电子自旋共振进行了表征,详细考察了等离子改性参数包括气氛组成、处理时间和处理功率对改性效果的影响,并通过降解甲基橙溶液考察了可见光光催化活性.结果表明,最佳等离子处理条件为N2与Ar比例为8:2,处理时间为20 min,放电电流为1.0 A.最后,使用改性后的光催化剂对模拟含汞废水进行了处理.The effect of N2/Ar dielectric barrier discharge plasma on the photocatalytic activity of CuO/TiO2 under visible light irradiation was studied. The photocataiysts were characterized by X-ray diffrac- tion, ultravioiet-visible spectrophotometry, transmission electron microscopy, X-ray photoelectron spectroscopy, and electron paramagnetic resonance spectroscopy. The plasma parameters includ- ing gas composition, treatment time, and plasma power were investigated. The activities of the plasma-treated photocatalysts were evaluated by the photodegradation of methyl orange under visible light illumination. The optimal operation conditions were N2：Ar = 8：2, treatment time of 20 min, and a discharge current of 1.0 A. Simulated mercury-containing wastewater was treated by the photocatalysts.

关 键 词：二氧化钛 等离子体 改性 氮掺杂 汞 

分 类 号：O643.36[理学—物理化学]