Study on Electro-Oxidation of Phenol by Rare Earth Gd Doping SnO2/Sb Coating Anode

SnCl₄-5H₂O, Sb₂O₃, and Gd(NO₃)₃ were used as the precursors to prepare the film of rare earth Gd doping SnO₂/Sb coating anode by coprecipitation method. The phenolic wasterwater was treated by the Gd doping SnO₂/Sb coating anode. The factors affecting the degradation rate of phenol were examined, such as the electrolyte concentration, current density, solution pH , solution temperature and doping Gd. The experimental results show that the rare earth Gd doping SnO₂/Sb coating anode has good effect on the degradation of phenol. Under the conditions of Na₂SO₄ concentration 0.2 mol/L , current density 0.06 A/cm₂, solution pH 3 and solution temperature 25°C , the degradation ratio of the phenol is 91.18% for 1.0h of oxidation and 99.37% for 2.5h.