钛基二氧化铅电极电催化降解2-氯苯酚  

ELECTRO-CATALYTIC OXIDATION OF 2-CHLOROPHENOL ON SEVERAL LEAD DIOXIDE ELECTRODES IN AQUEOUS SOLUTION

作　　者：郭新艳[1] 魏杰[1] 王东田[1,2] 

机构地区：[1]苏州科技学院化学与生物工程学院,江苏苏州215009 [2]江苏省环境功能材料重点实验室,江苏苏州215009

出　　处：《水处理技术》2011年第6期41-44,49,共5页Technology of Water Treatment

基　　金：国家科技重大专项子课题(2008ZX07421-002);江苏省环境科学与工程重点实验室开放课题(Zd091204);江苏省"青蓝工程"和江苏高校优势学科建设工程资助项目

摘　　要：用热解法和电沉积法分别制备了Ti/β-PbO2、Ti/SnO2+Sb2O3/β-PbO2和Ti/α-PbO2/β-PbO23种电极,并采用电子扫描电镜、X-射线衍射仪和阳极极化曲线分别对所制备的电极进行了表征,并以2-氯苯酚为目标污染物,考察了3种电极的电催化氧化性能和电极使用寿命。结果表明,中间层对表面活性层的结构形貌和催化活性都有很大影响,其中Ti/α-PbO2/β-PbO2电极析氧电位最高,对2-氯苯酚的去除率可达99.3%,且具有较长的电极使用寿命和较低的槽电压;3种电极对2-氯苯酚降解反应均遵循1级反应动力学规律。In this paper,three different types of Ti-base lead dioxide eletrodes including Ti/β-PbO2,Ti/SnO2＋Sb2O3/β-PbO2 and Ti/α-PbO2/β-PbO2 were successfully prepared using thermal decomposition and electrodeposition.Their performance was characterized through SEM,XRD and anodic polarization curves.The electrochemical oxidation in the target pollutant of 2-chlorophenol and the electrode life of this three eletrodes were aslo studied.The results showed that the mid-layer had a significant impact on the morphology and catalytic activity of active layer.Ti/α-PbO2/β-PbO2 eletrode in the three electrodes has the maximum oxygen evolution potential in 2-chlorophenol aqueous solution with the removal rate of 99.3%,A longer electrode life and a lower cell voltage.In addition,2-chlorophenol degradation by the three kinds of electrodes followed the first kinetics.

关 键 词：电催化氧化 钛基PbO2电极 2-氯苯酚 降解 

分 类 号：TQ035[化学工程] X703.1[环境科学与工程—环境工程]