高等学校化学学报

高等学校化学学报

• 研究简报 • 上一篇    下一篇

以葡萄糖和蔗糖为电子给体在Pt/TiO2上光催化制氢

李越湘1, 谢艳招1, 彭绍琴1, 吕功煊2, 李树本2   

    1. 南昌大学化学系, 南昌 330047;
    2. 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室, 兰州 730000
  • 收稿日期:2006-01-17 修回日期:1900-01-01 出版日期:2007-01-10 发布日期:2007-01-10
  • 通讯作者: 李越湘

Photocatalytic Hydrogen Generation Using Glucose and Sucrose as Electron Donors over Pt/TiO2

LI Yue-Xiang1, XIE Yan-Zhao1, PENG Shao-Qin1, L<SPAN lang=EN-US style=   

    1. Department of Chemistry, Nanchang University, Nanchang 330047, China;
    2. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2006-01-17 Revised:1900-01-01 Online:2007-01-10 Published:2007-01-10
  • Contact: LI Yue-Xiang

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摘要： 以Pt/TiO2为催化剂, 研究了以葡萄糖和蔗糖为电子给体的光催化制氢反应以及有机物自身的去除效果.

关键词: 光催化, 氢生成, 葡萄糖, 蔗糖, Pt/TiO2

Abstract: Using glucose and sucrose as the electron donors, the photocatalytic hydrogen evolution over Pt/TiO2 was investigated. Glucose and sucrose enhance notably the activity for hydrogen generation. The amounts of produced H2 increase almost proportionally to time within 5 h irradiation in the reaction systems of the two electron donors. The effect of the initial concentration of glucose and sucrose on the reaction rate is consistent with the Langmuir-Hinshelwood kinetic model. After 5 h irradiation, the COD(chemical oxygen demand) in the reaction system of glucose and in that of sucrose decrease by 33.2%, 11.4% respectively. The effect of electron donors on the flat-band potential of conduction band of TiO2 electrode was investigated. The flat-band potential of conduction band of TiO2 electrode in the presence of the electron donors shifts negatively, and the shift in the presence of glucose is larger than that in the presence of sucrose due to glucose having a larger adsorption amount on TiO2.

Key words: Photocatalysis, Hydrogen generation, Glucose, Sucrose, Pt/TiO2

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