高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (12): 2703.doi: 10.7503/cjcu20120325

• 物理化学 • 上一篇    下一篇

Fe-Ni/TiO2纳米管阵列电极的制备、表征及光电催化还原五氯酚活性

谭敬1, 李新勇1,2, Moses Tade2, 刘少敏2   

  1. 1. 大连理工大学环境学院, 工业生态与环境工程教育部重点实验室, 精细化工国家重点实验室, 大连 116023;
    2. 澳大利亚科廷大学化工系, 珀斯WA 6845
  • 收稿日期:2012-04-09 出版日期:2012-12-10 发布日期:2012-11-20
  • 通讯作者: 李新勇,男,博士,教授,博士生导师,主要从事环境催化与材料研究.E-mail:xyli@dlut.edu.cn E-mail:xyli@dlut.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: NSFC-RGC 21061160495)和国家"八六三"计划项目(批准号: 2010AA064902)资助.

Preparation and Characterization of Fe-Ni/TiO2 Nanotube Array Electrodes and Their Photoeletrocatalytic Activity for Dechlorination of Pentachlorophenol

TAN Jing1, LI Xin-Yong1,2, MOSES Tade2, LIU Shao-Min2   

  1. 1. School of Environmental Science and Technology, State Key Laboratory of Fine Chemical Engineering, Key Laboratory of Industrial Ecology and Environmental Engineering of Ministry of Education, Dalian University of Technology, Dalian 116024, China;
    2. Department of Chemical Engineering, Curtin University, Perth WA 6845, Australia
  • Received:2012-04-09 Online:2012-12-10 Published:2012-11-20

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摘要：

采用阳极氧化法和浸渍电沉积联用法制备了不同负载量的Fe-Ni/TiO2纳米管阵列电极. 通过扫描电子显微镜(SEM)、 X射线光电子能谱(XPS)和电化学测量等手段对样品的微观形貌、 晶体结构和光电响应等特性进行分析. 考察了在0.6 V偏压下, 所制备的电极对五氯酚的光电催化还原性能. 结果表明, 适量的Fe和Ni纳米颗粒的负载, 降低了TiO2纳米管阵列光生电子-空穴对的复合几率; 浸渍电沉积5次的Fe-Ni/TiO2纳米管阵列电极光电催化还原降解五氯酚的效率为91.35%, 明显高于TiO2纳米管阵列电极.

关键词: Fe-Ni/TiO2纳米管阵列电极, 光电催化, 还原脱氯, 五氯酚

Abstract:

The Fe-Ni/TiO2 nanotube array electrodes with different metal loadings were fabricated by the anodic oxidation method, followed by a dipping and electro-deposition technique. Scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS) and electrochemical measurements were employed to characterize the catalysts. The photoelectrocatalytic(PEC) reductive degradation of pentachloroph-enol(PCP) by the catalysts was investigated at 0.6 V bias potential in 2-propanol solution. The results indicate that the proper Fe and Ni nanoparticles depositing on the TiO2 nanotube array electrodes could reduce the recombination probability of photoinduced electron and hole. The PEC reductive degradation efficiency of PCP over Fe-Ni/TiO2 nanotube array electrodes with dipping and electro-deposition for 5 cycles could be above 91.35%, much faster than TiO2 nanotube electrodes.

Key words: Fe-Ni/TiO2 nanotube array electrode, Photoelectrocatalytic, Reductive dechlorination, Pentachlorophenol

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