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

SnCl 4 -5H 2 O, Sb 2 O 3 , and Gd(NO 3 ) 3 were used as the precursors to prepare the film of rare earth Gd doping SnO 2 /Sb coating anode by coprecipitation method. The phenolic wasterwater was treated by the Gd doping SnO 2 /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 SnO 2 /Sb coating anode has good effect on the degradation of phenol. Under the conditions of Na 2 SO 4 concentration 0.2 mol/L , current density 0.06 A/cm 2 , 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.