关键词: Ti／Sb2O5-SnO2电极, 电催化, 掺杂, Y

Abstract: Yttrium was selected as a promoter for the Ti／Sb2O5-SnO2 electrode to enhance its electro-catalytic characteristics and Y doped Ti／Sb2O5-SnO2 electrodes were prepared by the immersion method. Degeneracy of the prepared electrodes was investigated using reactive brilliant red X-3B as a model pollutant. The parameters of preparing the electrode, including temperature and Y doping content, were studied in detail. The optimal pyrolytic temperature was 550℃, and Y doping content was 0.8％. The micrograph of the electrode surface, the element composition of different layers and the structure of the electrode were analyzed by SEM, EDS and XRD. Compared with the Ti／Sb2O5-SnO2 electrode, the average size of SnO2 grains on the electrode surface of the Y doped Ti／Sb2O5-SnO2 electrode was smaller, which implies a potential improvement in catalytic performance. Sb and Y were found to be enriched in the coated layer on the electrode surface when Y was introduced. The surface of the Y doped Ti／Sb2O5-SnO2 electrode was mainly composed of tetragonal rutile structure SnO2 crystal. The potential sweep results indicate that the Y doped Ti／Sb2O5-SnO2 electrode has high oxygen evolution potential which is in favor of electrochemical oxidation for organic pollutants.

Key words: electro-catalysis, dope, Yttrium, Ti／Sb2O5-SnO2 electrode