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

Article abstract of DOI:10.1016/S1872-2067(15)60851-8

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°C, 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.