Electrochemical Degradation of 4, 4′-(propane-2, 2-diyl) diphenol in Water with CeO2/β-PbO2/Ti Electrode

Ti-base CeO2/beta-PbO2 composite electrodes were prepared by using electro-deposition and its morphology and crystal structure and electrochemical characterization of composite electrodes were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), cyclic voltammetry and the accelerated life testing. The efficiency of electrocatalytic degradation of 4,4'-(propane-2,2diyl) diphenol (BPA) by using composite electrodes as anode were examined as a function of initial solution pH, applied voltage and supporting electrolyte concentration were investigated. The results showed that CeO2/beta-PbO2/Ti electrode had an excellent corrosion resistance and excellent catalytic performance higher catalytic activity in electro-chemical degradation of 4, 4'-(propane-2, 2- diyl) diphenol in water. The removal efficiency of CODCr could be reached 95.7% after 1.5 h electrolysis at NaCl concentration of 0.020 mol/L, 4,4'-(propane-2,2- diyl) diphenol initial concentration of 20 mg/L, applied voltage of 20 V, electrode spacing of 7 cm and electrolyte pH of 5. The reaction mechanism and kinetics of CeO2/beta-PbO2/Ti composite electrodes electrochemical degradation 4, 4'-(propane- 2, 2diyl) diphenol mainly caused by the OH radical attacking parent molecules and the degradation followed pseudo-first-order kinetics.