Factors affecting the electro-catalytic characteristics of Eu doped SnO2/Sb electrode.
Different compositions of Eu doped electrodes were prepared by a pyrolysis method in order to investigate the effect of Eu on the electro-catalytic behavior of Ti-based SnO(2)/Sb electrodes. The electrodes were characterized by SEM, EDS, XRD and their degradation abilities were evaluated using phenol. The electro-catalytic performance of prepared electrodes was strongly influenced by the heat-treatment temperature and Eu doping content. A temperature of 750 degrees C and a Eu content of 2% provided optimal catalytic activity for the SnO(2)/Sb electrode. Phenol removal percentage was lowered by 13.2% compared to the control when higher Eu doping (5%) was applied due to the potential concentration of oxygen vacancies and the enrichment of Eu atoms on electrode surface. The unit cell of SnO(2) expanded by about 2% after Eu doping due to the replacement of the smaller Sn(4+) by larger Eu(3+). The average size of the SnO(2) grains on the electrode surface for the Eu doped samples ranged from 8 to 9 nm, which was smaller than that of the control, suggesting catalysis improvement since smaller grain sizes produced more active sites on the electrode surface.
Feng
Yujie
Y
State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang Disrtict, Harbin 150090, China. yujief@hit.edu.cn
Cui
Yu-Hong
YH
Liu
Junfeng
J
Logan
Bruce E
BE
D000965:Antimony / Q000737:chemistry*; D002384:Catalysis; D004563:Electrochemistry; D004566:Electrodes; D004572:Electrolysis; D005063:Europium / Q000737:chemistry*; D006358:Hot Temperature; D007220:Industrial Waste / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D010636:Phenols / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D017971:Tin Compounds / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid; D014961:X-Ray Diffraction
D007220:Industrial Waste; D010636:Phenols; D017971:Tin Compounds; D005063:Europium; D000965:Antimony; D014025:Titanium; C045358:stannic oxide