钌掺杂TiO_2/Ti光电极的制备及光电催化性能

Preparation of Ruthenium-Doped TiO_2/Ti Photoelectrodes and Photoelectrocatalytic Performance

采用阳极氧化法制备贵金属钌掺杂TiO2/Ti光电极,用EIS、XRD和SEM对光电极的性能进行表征,并对亚甲基蓝进行光电催化降解。结果表明:钌掺杂后可增大TiO2/Ti光电极比表面积,提高其光电催化活性;在HF电解液中,阳极氧化制备钌掺杂TiO2/Ti光电极的最佳条件为:氧化电压为20V,氧化时间20min,热处理温度600℃;以紫外灯(125W)为光源,在外加偏压0.2V,钌掺杂TiO2/Ti光电极对亚甲基蓝光电催化120min可完全脱色。

Noble metal ruthenium-doped TiO2/Ti photoelectrodes were prepared by anodization. The photoelectrodes were characterized by EIS,XRD and SEM. And the photoelectrocatalytic degradation of methylene blue was carried out using the photoelectrodes. The results show that ruthenium doping can increase the specific surface area and enhance the photoelectrocatalytic activity of TiO2/Ti photoelectrodes. In 0.5% HF electrolyte,the optimal parameters are anodization voltage of 20 V,anodization time of 20 min and heat treatment of 600 oC for ruthenium-doped TiO2/Ti photoelectrode preparation. With bias voltage of 0.2 V,methylene blue were decolored completely in 120 min by ruthenium-doped TiO2/Ti photoelectrodes under UV light（125 W）.