Preparation Of Electrode By Electrodeposition And Study On Performance Of Degradation Phenol Wastewater

The wastewater becomes one of the urgent issues to be resolved currently. The water pollution is diverse and complexity, The traditional methods are hard to satisfy the social need, nowadays. Advanced'electrochemical oxidation process(AEOP), as one of advanced oxidation process(AOP), can efficiently (?)ecompose of organic pollutants and make it transform to CO2 and H2O completely, owing to the oxidative hydroxide radical (OH) being produced during electrochemical process. AEOP attracts extensive attention and shows a good application foreground, because of its small-bulk set, no second pollution, and easy combining with other treatment methods.The electrode was prepared by electrodeposition-thermal oxidation, dip coating process and combination of two methods. The conditions in preparation, including the parameters of electrodeposition, the time of electrodeposition, the temperature of solution, current density, the parameters of thermal treatment and the doping amount of Sb, were studied in detail. The conditions in preparation, the doping amount of Sb, the parameters of thermal treatment and the doing amount of Gd, Ce, La, Ni, Mn, Co. It was found that by covering base layer onto the surface of the electrode the catalytic-oxidation capacity was increased. As a kind of electrodes with high catalytic efficiency, the SnO2/Ti electrode prepared in this paper can be used for organic wastewater which can (?)ot be treated by conventional biological treatment. The crystal structure and the surface characteristics were analyzed with the help of XRD, SEM.By comparing phenol degradation rate with the methods of different preparation and element doped SnO2/Ti electrodes. Results showed that the phenol degradation rate is 48.57% with the Sb-SnO2/Ti electrode was prepared by electrodeposition-thermal oxidation, the voltage changes 0.4V, the phenol degradation rate higher than SnO2/Ti electrode was prepared by electrodeposition-thermal oxidation 10.05%; the phenol degradation rate higher than Sb-SnO2/Ti electrode was prepared by dip coating process 23.36%. The Sb-SnO2/Ti electrode surface which was prepared by electrodeposhion-thermal oxidation was more even and more compact, it have high catalytic efficiency. The oxygen evolution potentials of Gd-Sb-SnO2/Ti electrode and Ni-Sb-SnO2/Ti electrode which contains a middle layer are 2.27V and 1.99V, higher than Sb-SnO2/Ti electrode 1.75V, it will improve catalytic efficiency of electrode.