氧扩散电极与Ti/SnO_2-Sb_2O_4电极协同降解水中苯酚  

Synergetic Effect of Oxygen Diffusion Electrode and Ti/SnO_2-Sb_2O_4 Electrode in Photoelectrocatalytic Degradation of Phenol in Water

作　　者：张晓燕[1] 樊彩梅[1] 梁镇海[1] 孙彦平[1] 

机构地区：[1]太原理工大学洁净化工研究所,山西太原030024

出　　处：《太原理工大学学报》2007年第2期130-132,149,共4页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(20476070);山西省自然科学基金资助项目(20041020;20031024)

摘　　要：采用热压法制备多孔氧扩散电极,采用热解法制备Ti/SnO2-Sb2O4电极,并将两电极应用于光电催化降解水中苯酚的研究中。通过BET测试、X射线衍射(XRD)分析及扫描电镜分析(SEM)对电极进行了表征。考察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:氧扩散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;Ti/SnO2-Sb2O4电极的主要晶相是SnO2和Sb2O4,钛基表面的二氧化锡是四方相的金红石结构;在降解水中苯酚的过程中,氧扩散电极与Ti/SnO2-Sb2O4光阳极能产生良好的光电协同效应。In this paper, a oxygen diffusion electrode was prepared by hot pressure method, a Ti/SnO2-Sb2O4 electrode was made by thermal decomposition technology, and they were used in photoelectrocatalytic degradation of phenol in water. The electrodes were charactered by BET, XRD and SEM. The removals of phenol in different processes including adsorption, photocatalysis, electrocatalysis and photoelectrocatalysis were compared in the same experimental conditions. The results showed that the specific surface area of oxygen diffusion electrode was sizable, the main crystalline of this electrode were graphite and MnaO4, the materials and pores were well-distributed on the surface and inside of the oxygen electrode. The main crystalline of Ti/ SnO2-Sb2O4 electrode were SnO2 and Sb2O4, the SnO2 onto the Ti base metal is futile. The oxygen diffusion electrode displayed a good synergy with the Ti/SnO2-Sb2O4 photoanode in the photoelectrocatalytic degradation of phenol in water.

关 键 词：氧扩散电极 Ti/Sn02-Sb2O4 光电催化 苯酚 

分 类 号：X703.1[环境科学与工程—环境工程] O614.41[理学—无机化学]