稀土Gd掺杂SnO_2-Sb涂层阳极电催化氧化甲基橙

Electro-catalytic Oxidation of Methyl Orange by Rare Earth Gd Doping SnO_2-Sb Coating Anode

采用溶胶-凝胶法,以无机盐SnCl4·5H2O,Sb2O3,Gd(NO3)3为前驱体,制备了稀土Gd掺杂SnO2-Sb涂层阳极。以稀土Gd掺杂SnO2-Sb为阳极电催化氧化处理甲基橙溶液,考察了电解质浓度、电流密度、溶液的pH、溶液温度及稀土Gd掺杂对甲基橙降解率的影响。实验结果表明:稀土Gd掺杂SnO2-Sb涂层阳极对甲基橙具有较好的降解效果。在电解质NaCl质量浓度为4g/L、电流密度为0.06A/cm2、甲基橙溶液的pH为3、溶液温度为25℃条件下,氧化降解1.0h甲基橙降解率为92.21%,氧化降解2.5h甲基橙降解率为99.15%。

SnCl4 5H2O, Sb2O3, and Gd（NO3 ）3 were used as precursors to prepare the film of rare earth Gd doping SnO2-Sb coating anode by Sol-Gel method. The methyl orange solution was treated by electro-catalytic oxidation using the Gd doping SnO2-Sb anode. The factors affecting the degradation rate of methyl orange were examined, such as the electrolyte concentration, current density, solution pH and solution temperature and Gd doping. The experimental results show that the self-made rare earth Gd doping SnO2-Sb coating anode has good effect on the degradation of methyl orange. Under the conditions of NaC1 mass concentration 4 g/L, current density 0.06 A/cm2, solution pH 3 and solution temperature 25℃, the degradation rate of methyl orange is 92.21% for 1.0 h of oxidation and 99.15% for 2.5 h.