氧电极在光电催化降解水中苯酚的性能  

Properties of Oxygen Electrodes in Photoelectrocatalytic Degradation of Phenol in Water

作　　者：樊彩梅[1] 张晓燕[1] 王韵芳[1] 郝晓刚[1] 孙彦平[1] 

机构地区：[1]太原理工大学洁净化工研究所,太原030024

出　　处：《应用化学》2007年第4期388-391,共4页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20476070);山西省自然科学基金(20041020)资助项目

摘　　要：以乙炔黑、活性炭、石墨粉与适量的Mn(NO3)2为原料,采用热压法制备氧电极,将其应用于光电催化降解水中苯酚的研究。采用BET、X射线衍射(XRD)及扫描电镜分析(SEM)测试技术对氧电极进行了表征,并考察了氧电极的制备条件对电极光电催化性能的影响,比较了铜片、镍片、氧电极3种不同阴极对苯酚的降解效果,也比较了相同操作条件下吸附、光催化、电催化、光电催化等过程对苯酚降解效果的影响。结果表明,氧电极的比表面积较大,主要晶相为石墨、Mn3O4,电极表面和内部的物料混合及气孔分布比较均匀;电极的较佳制备条件为:石墨、乙炔黑与活性炭的质量比1∶1∶1,烧结温度400℃,电极厚度1.0 mm;在降解水中苯酚的过程中,氧电极与光阳极能产生良好的光电协同效应,提高了水中苯酚的矿化率。Oxygen electrodes were made by means of the hot pressure method with acetylene black, active carbon, graphite and Mn（ NO3 ）2 as row materials, and they were used in photoelectrocatalytic degradation of phenol in water. The electrodes were characterized by BET, XRD and SEM. The effects of the conditions of preparing the oxygen electrode on the degradation rate of phenol were investigated. The effects of different cathodes of Cu, Ni and oxygen electrodes on the degradation of phenol were compared. The removal of phenol in the different processes including adsorption, photocatalysis, electrocatalysis and photoelectrocatalysis were also compared under the same experimental conditions. The results show that the specific surface area of the oxygen electrode was large, and the main crystalline of this electrode was graphite and Mn304. The materials and pores were well-distributed on the surface and inside of the oxygen electrode. The favorite conditions of preparing oxygen cathodes are that the mass ratio of graphite ： acetylene black ： activated carbon is 1 ： 1 ： 1, the sintering temperature of the cathode is 400 ℃ and the thickness of the cathode is 1 mm. The oxygen electrode displays a good synergy with the photoanode in the photoelectrocatalytic degradation of phenol and enhanced the mineralization of phenol in water.

关 键 词：氧电极 苯酚 光电催化 

分 类 号：O625[理学—有机化学]