| 多孔阵列TiO2/Ti的光电催化性能 |
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| 引用本文： | 雷建飞,李伟善.多孔阵列TiO2/Ti的光电催化性能[J].物理化学学报,2009,25(6):1173-1178. |
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| 作者姓名： | 雷建飞 李伟善 |
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| 作者单位： | 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 |
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| 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.
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| 关 键 词： | 二氧化钛 多孔阵列 光催化 降解甲基橙 析氢 |
| 收稿时间： | 2008-10-24 |
| 修稿时间： | 2009-02-23 |
Photoelectrocatalytic Performance of Arrayed Porous TiO2/Ti |
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| LEI Jian-Fei,LI Wei-Shan.Photoelectrocatalytic Performance of Arrayed Porous TiO2/Ti[J].Acta Physico-Chimica Sinica,2009,25(6):1173-1178. |
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| Authors: | LEI Jian-Fei LI Wei-Shan |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Titaniumdioxide Porous array Photoelectrocatalysis Methyl orange degradation Hydrogen evolution |
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