Fe掺杂钛基SnO2／Sb电催化电极的制备及表征  

Preparation and Characterization of Fe Doped Ti-Based SnO_2/Sb Electro-Catalytic Electrode

作　　者：张翼[1] 刘蕾[2] 孙晓东[3] 张荣庆[1] 王磊[1] 

机构地区：[1]大庆石油学院化学化工学院,黑龙江大庆163318 [2]长庆油田第三采油厂,宁夏银川750006 [3]齐齐哈尔大学,黑龙江齐齐哈尔161006

出　　处：《材料保护》2008年第3期31-33,70,共4页Materials Protection

摘　　要：为了改进钛基SnO2/Sb电极的电催化性能,采用高温热氧化法制备了Fe掺杂钛基SnO2/Sb电极。采用SEM、EDX以及XRD等方法对所制备电极的表面形貌、元素组成及结构进行分析,并以苯酚为目标有机物,研究了所制备电极对有机污染物的电催化降解能力。结果表明,适量Fe的掺杂有利于晶粒细化和导电性的提高;但过量Fe的掺杂可能导致SnO2晶格的混乱程度增大,甚至使晶格破坏,从而使电极性能降低;掺杂0.5%Fe的SnO2/Sb电极对苯酚的降解效果优于未掺杂Fe的电极;电解3 h后,苯酚去除率和化学需氧量(COD)去除率分别达到100.0%和92.0%。Fe was selected as a promoter for Ti-based SnO2/Sb electrode to improve the electro-catalytic ability in wastewater treatment. The morphology, elemental composition, and microstructure of the electrode were analyzed by means of scanning electron spectroscopy (SEM), energy dispersive X-ray analysis, and X-ray diffraction. Moreover, the electro-catalytic oxidation characteristics of the prepared electrode were investigated using phenol as a model compound. It was found that doping of Fe at a proper proportion was in favor of grain refining and helped to enhance the electrical conductivity of the electrodes. However, Fe doping at a high content led to increased disorder of SnO2 lattice and even destruction of the lattice, which could cause worsening of the electrode performance. Besides, it was easier for the phenol to be degraded on the Ti -based SnO2/Sb electrode doped with 0.5%Fe than on the electrode without Fe doping, and the phenol and other reducing substances could be removed up to a rate of 100% and 92%, respectively, abet 3 h treatment with the electrode doped with Fe.

关 键 词：SnO2/Sb电极 Fe 电催化 苯酚 

分 类 号：X703[环境科学与工程—环境工程]