表层稀土掺杂PbO_2电极及对苯酚电催化氧化性能研究

Preparation and Electro-oxidation of La-doped PbO_2 Electrodes for Aqueous Phenol emoval

以钛电极为基体,用热分解法制备Sn-Sb中间层,电沉积方法制备稀土La掺杂PbO2电极,优化了制备改性PbO2电极的电沉积温度、电沉积时间及稀土掺杂量。以苯酚废水为目标有机物,借助于苯酚去除情况分析电极的电催化氧化能力;分析了电极结构与电催化特性之间的关系。采用SEM、EDX和XRD分析了制备电极的表面形貌、元素组成、晶体结构。实验结果表明:电沉积液温度50℃,电沉积2 h,稀土镧掺杂量4∶1的PbO2电极降解苯酚电催化性能有明显改善,其去除率达到90.9%。

Modified lead dioxide electrodes on Ti substrates were prepared by electro-deposition.Technological parameters of the electrode preparation were optimized by changing the electro deposition temperature,electrode deposition time and the surface dopes La influencing factors in the degradation process of phenol.The experimental results showed that when the electro deposition temperature was at 50℃,the electro deposition time was 2 hours,Pb and La in the ratio of 4∶1,the electro-catalytic phenol degradation of the La-doped Ti/Sn-Sb/PbO2 eletrodes was significantly improved with phenol removal reached 90.9%.