State Key Laboratory of Urban Water Resource & Environment, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang Disrtict, Harbin 150090, China.
J Hazard Mater. 2010 Jun 15;178(1-3):29-34. doi: 10.1016/j.jhazmat.2009.12.101. Epub 2010 Jan 4.
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.
采用高温分解法制备了不同组成的 Eu 掺杂电极，以研究 Eu 对 Ti 基 SnO(2)/Sb 电极电催化性能的影响。采用 SEM、EDS、XRD 对电极进行了表征，并采用苯酚评价了其降解能力。制备电极的电催化性能强烈受到热处理温度和 Eu 掺杂含量的影响。当采用 750°C 的温度和 2%的 Eu 掺杂时，SnO(2)/Sb 电极表现出最佳的催化活性。与对照相比，当采用较高的 Eu 掺杂（5%）时，苯酚去除率降低了 13.2%，这是由于氧空位的潜在浓度和 Eu 原子在电极表面的富集。Eu 掺杂后 SnO(2)的单元晶胞膨胀了约 2%，这是由于较小的 Sn(4+)被较大的 Eu(3+)取代。Eu 掺杂样品电极表面 SnO(2)晶粒的平均尺寸在 8 到 9nm 之间，小于对照品，这表明由于电极表面的较小晶粒尺寸产生了更多的活性位点，从而提高了催化作用。
