摘要
采用电化学沉积法在Ti基底上制备了复合电极Ti/α-PbO 2/β-PbO 2,扫描电镜结果表明电极呈现由β-PbO 2小晶体组成的菜花状微观形貌.所制电极在电化学降解环境污染物2-氯酚时表现出较高的电催化效率、较好的电极稳定性和较长的电极寿命.用正交实验优化了电化学降解2-氯酚的实验条件.在最优的实验条件(2-氯酚初始浓度50 mg/L,电解质0.1 mol/L Na2SO4,温度35 oC,阳极电流密度20 mA/cm2)下电化学降解180 min后,2-氯酚的去除率达100%.动力学结果表明,Ti/α-PbO 2/β-Pb O2电极上2-氯酚的电化学氧化符合准一级动力学过程.
A Ti/α-PbO2/β-PbO2 electrode with high stability was prepared and examined toward the electro- chemical degradation of 2-chlorophenol. Scanning electron microscopy analysis revealed that Ti/α-PbO2/β-PbO2 had a cauliflower morphology comprising small β-Pb02 crystals. The 2-chlorophenol removal rate using the Ti/α-PbO2/β-PbO2 electrode was 100% after 180 min of electrolysis under optimal conditions, which were selected based on the orthogonal test method, i.e., initial concentration of 2-cholorophenol = 50 mg/L, concentration of Na2S04 = 0.1 mol/L, tem- perature = 35℃, and anode current density = 20 mA/cm2. Kinetic analyses demonstrated that the electrochemical oxidation of 2-chlorophenol on the Ti/α-PbO2/β-PbO2 electrode followed pseu- do-first order kinetics.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第7期975-981,共7页
基金
supported by the National Natural Science Foundation of China(251178283,20905055)
the Six-Field Talent Peak Program of Jiangsu Province
and the Graduate Research and Innovation Plan of Jiangsu Province(SJLX_0580)~~
