Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (7): 975-981.DOI: 10.1016/S1872-2067(15)60851-8

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Facile preparation of a Ti/α-PbO2/β-PbO2 electrode for theelectrochemical degradation of 2-chlorophenol

Qianli Zhang, Xinyan Guo, Xiaodan Cao, Dongtian Wang, Jie Wei   

  1. College of Chemistry and Material Engineering, Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
  • Received:2015-01-08 Revised:2015-03-27 Online:2015-06-12 Published:2015-07-30
  • Supported by:

    This work was 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).

Abstract:

A Ti/α-PbO2/β-PbO2 electrode with high stability was prepared and examined toward the electrochemical degradation of 2-chlorophenol. Scanning electron microscopy analysis revealed that Ti/α-PbO2/β-PbO2 had a cauliflower morphology comprising small β-PbO2 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 Na2SO4 = 0.1 mol/L, temperature = 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 pseudo-first order kinetics.

Key words: Electrochemical degradation, 2-Chlorophenol, β-PbO2 electrode, α-PbO2 interlayer, Kinetic analysis