稀土Gd掺杂对SnO_2电催化电极性能影响的研究  

Study of the influences of Gd doping on the characteristics of SnO_2 catalytic electrodes

作　　者：王静[1] 冯玉杰[2] 刘正乾[2] 

机构地区：[1]黑龙江科技学院资源与环境工程学院,黑龙江哈尔滨150027 [2]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150001

出　　处：《功能材料》2005年第6期877-880,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50278022)

摘　　要：采用浸渍法、溶胶凝胶法,以SnCl4·5H2O、Sb2O3、Gd(NO3)3为前驱体,制备了稀土Gd掺杂SnO2涂层电极及SnO2电极。以苯酚为目标有机物,研究了不同稀土掺杂量、不同制备方法所获得电极的电化学降解特性,确定了较适宜的稀土掺杂量和制备方法。在本实验条件,稀土掺杂量(原子质量比)为Sn∶Sb∶Gd=100∶6∶1条件下制备的电催化电极性能最好,溶胶凝胶法制备的电极其电催化性能及稳定性能均优于浸渍法制备的电极。对所制备的稀土Gd掺杂电极及空白电极进行了TOC测试、UV扫描分析及SEM、XRD、XPS等表征,分析并讨论了稀土掺杂对SnO2电极性能的影响机理。结果表明,稀土Gd的掺杂有利于SnO2电极电催化性能的提高,而且不同稀土掺杂量对SnO2电极性能影响并不相同。Two kinds of electrodes, Gd doping SnO2 electrode and pure SnO2 electrode were prepared with sol-gel and dipping method respectively, in which process SnCl4&middot5H2O, Sb2O3, Gd(NO3)3 were chosen as precursors. Taking phenol as model substrate, the electrochemical characteristics of above two electrodes were evaluated, and the optimal content of Gd and the available electrode preparation method was determined. A kind of mole ratio of 100: 6: 1 of Sn, Sb and Gd was got and it was found that the sol-gel method was much more suitable for electrode preparation at present electrode preparation. TOC, UV scan, SEM, XRD and XPS etc were selected to study the structure variation of SnO2 after Gd doping. The mechanism was also discussed. Results showed that Gd doping can help to enhance the electrocatalytic characteristics of SnO2 electrodes and different Gd content have diverse effects.

关 键 词：稀土 涂层电极(DSA) 掺杂 苯酚 

分 类 号：O643.32[理学—物理化学]