物理化学学报 >> 2009, Vol. 25 >> Issue (06): 1173-1178.doi: 10.3866/PKU.WHXB20090614

研究论文 上一篇    下一篇

多孔阵列TiO2/Ti的光电催化性能

雷建飞, 李伟善   

  1. 华南师范大学化学与环境学院, 广州 510006|广东高校电化学储能与发电技术重点实验室, 广州 510006
  • 收稿日期:2008-10-24 修回日期:2009-02-23 发布日期:2009-06-05
  • 通讯作者: 李伟善 E-mail:liwsh@scnu.edu.cn

Photoelectrocatalytic Performance of Arrayed Porous TiO2/Ti

LEI Jian-Fei, LI Wei-Shan   

  1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China|Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation in Guangdong Universities, Guangzhou 510006, P. R. China
  • Received:2008-10-24 Revised:2009-02-23 Published:2009-06-05
  • Contact: LI Wei-Shan E-mail:liwsh@scnu.edu.cn

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, 2.5 h内对甲基橙的降解率达到87.1%, 5.0 h高达97.9%, 反应表观速率常数为0.77 h-1;光照作用可以使析氢电位降低0.13 V.

关键词: 二氧化钛, 多孔阵列, 光催化, 降解甲基橙, 析氢

Abstract:

Arrayed porous titaniumdioxide 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 TiO2/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.

Key words: Titaniumdioxide, Porous array, Photoelectrocatalysis, Methyl orange degradation, Hydrogen evolution

MSC2000: 

  • O643