Fe-Ni-TiO_2/AC粒子电极的制备及可见光光电催化协同降解RhB  

Preparation of Fe-Ni-TiO_2/AC particle electrodes and synergic degradation of Rh B using visible irradiation photoelectrocatalytic system

作　　者：孙玲芳[1] 喻泽斌[1] 彭振波 项国梁[1] 李明洁[1] 陈颖[1] 王莉[1] 

机构地区：[1]广西大学环境学院,广西南宁530004

出　　处：《中国环境科学》2014年第12期3119-3126,共8页China Environmental Science

基　　金：国家自然科学基金项目(21367002)

摘　　要：制备Fe-Ni-Ti O2/AC粒子电极,应用于可见光助三维电极/电Fenton(Vis-3D/EF)光电催化体系中,以Rh B为目标污染物,研究了可见光光电催化对Rh B的协同降解.实验优化了Fe-Ni-Ti O2/AC粒子电极的制备条件,并与活性炭粒子电极、活性炭负载Ti O2粒子电极在Vis-3D/EF体系中的光电催化性能进行对比,结果表明:Ti O2浸渍液浓度为2g/L,Fe-Ni掺杂比为5:5,Fe:Ni:Ti O2物质的量比为0.5:0.5:100的条件下制备的粒子电极在Vis-3D/EF体系中表现出最优的光电催化性能,60min对Rh B的去除率达92.58%,优于活性炭粒子电极和活性炭负载Ti O2粒子电极.自制粒子电极在Vis-3D/EF体系比在3D/EF体系对Rh B的去除率提高29.46%,表现出明显的光催化和三维电极/电Fenton协同处理效果,协同指数为1.18,说明了自制粒子电极应用在Vis-3D/EF组合技术中,实现对Rh B的可见光光电协同降解是可行的.The Fe-Ni co-doping TiO2 particles loaded activated carbon （Fe-Ni-TiO2/AC） particle electrodes were synthesized and applied to a visible, irradiation assisted, three-dimensional electro-Fenton （Vis-3D/EF） system. The synergic performance of Vis-3D/EF system was investigated using RhB as target pollutant. Compared with activated carbon particle electrodes and TiO2 loaded activated carbon particle electrodes, the photoelectrocatalytic performance of Fe-Ni-TiO2/AC particle electrodes in Vis-3D/EF system was the highest with the optimum synthesized conditions of TiO2 concentration of 2g/L, Fe-Ni doping ratio of 5：5 and Fe：Ni：TiO2 molar ratio of 0.5：0.5：100. The hightest degradation rate of RhB in Vis-3D/EF system reached 92.58%with in 60min. The RhB removal rate of Fe-Ni-TiO2/AC particle electrodes in Vis-3D/EF increased 29.46%compared with 3D/EF. A significant synergetic effect was observed between visible light photocatalysis and 3D/EF processes in the system, with a synergetic factor of 1.18. Result suggested it was feasible for the synergic degradation of RhB under visible irradiation in the Vis-3D/EF combination technique.

关 键 词：光电催化:三维电极/电Fenton 粒子电极 可见光 

分 类 号：X703.5[环境科学与工程—环境工程]