深圳大学学报（理工版）2013，Vol.30Issue(1)：42-47,6.DOI:10.3724/SP.J.1249.2013.01042
氧化铌掺杂PbO2电极的制备及降解分散蓝B
Preparation of Nb2O5 doped PbO2 electrode and its degradation of disperse blue B
摘要
Abstract
The Nb2O5/PbO2 electrode based on Ti substrate was prepared by electrodeposition method. Properties of the electrode were investigated by XRD, SEM and electrochemical measurements. The results showed that the Nb2O3 doping led to transformation of crystalline form, and a- PbO2 was formed in the surface of the anode, which improved the binding degree between the coating and substrate as well as efficiency of electron-transfer. It also led to the increase of the crystallite size and the particles were arranged regularly and uniformly. When the optimum doping content of Nb2O5 was 3. 5 g/L, oxygen evolution potential increased to 1. 523 V, step current was 0. 1559 A, and strengthening lifetime reached 702 min. Compared with PbO2 electrode, Nb2O5/PbO2 electrode significantly enhanced electrocatalytic performance and stability. The modified electrode was effective in degradation of disperse blue B. The best degradation conditions were; pH = 2; concentration of electrolyte c ( NaCl) = 0. 7 mol/L; current density was 40 mA/cm2. After 1 h, the decoloration rate of disperse blue B reached up to 89%. The apparent kinetics of the decolorization reaction followed a second-order behavior.关键词
电化学/钛基PbO2电极/电沉积/氧化铌/分散蓝B/氧化/难降解有机废水/染料废水Key words
electrochemistry/ Ti-PbO2 electrode/ electrodeposition/ Nb2O5/ disperse blue/ oxidation/ refractory organic waster water/ dyeing waster water分类
化学化工引用本文复制引用
唐文伟,陈晓颖,张旻,苏兴治,肖耀明,曾新平..氧化铌掺杂PbO2电极的制备及降解分散蓝B[J].深圳大学学报（理工版）,2013,30(1):42-47,6.基金项目
国家自然科学基金资助项目(21277098) （21277098）
上海市科委自然科学基金资助项目(10ZR1432500) （10ZR1432500）
