多孔阵列TiO_2/Ti的光电催化性能  

Photoelectrocatalytic Performance of Arrayed Porous TiO_2/Ti

作　　者：雷建飞[1] 李伟善[1,2] 

机构地区：[1]华南师范大学化学与环境学院,广州510006 [2]广东高校电化学储能与发电技术重点实验室,广州510006

出　　处：《物理化学学报》2009年第6期1173-1178,共6页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20573039)资助项目

摘　　要：以聚苯乙烯微球(PS)阵列为模板,溶胶浸渍法制得负载于钛基的多孔阵列二氧化钛材料TiO2/Ti,用SEM和XRD分析其表面形貌和晶相组成.将此多孔材料用作电极,研究其间歇光照开路电位谱和光电流谱,催化降解甲基橙以及催化析氢反应等光电催化性能.结果表明,在光电协同作用下多孔阵列TiO2/Ti具有很高的催化活性,2.5h内对甲基橙的降解率达到87.1%,5.0h高达97.9%,反应表观速率常数为0.77h-1;光照作用可以使析氢电位降低0.13V.Arrayed porous titanium dioxide loaded on titanium （TiO2/Ti） was fabricated using the sol-dipping method with polystyrene sphere （PS） arrays as a template. Its morphology and crystal phase composition were characterized by SEM and XRD, and its photoelectrocatalytic performance was studied using open-circuit potential curves, photocurrents with intermittent irradiation, degradation of methyl orange and hydrogen-evolution overpotential. Results show that arrayed porous TiO/Ti has high catalytic activity because of the photoelectro-synergisitic effect. The degradation rate of methyl orange was 87.1% after reaction for 2.5 h and 97.9% after reaction for 5 h, and it has an apparent reaction rate constant of 0.77 h-1. The hydrogen-evolution overpotential on this material was reduced from -0.81 V to -0.68 V under ultraviolet irradiation.

关 键 词：二氧化钛 多孔阵列 光催化 降解甲基橙 析氢 

分 类 号：O643.3[理学—物理化学]