高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (2): 342.

• 研究快报 • 上一篇    下一篇

乙烯在Pt/Pt4+-TiO2上的可见光降解

陈亦琳, 李旦振, 付贤智, 刘平   

  1. 福州大学光催化研究所, 福州 350002
  • 收稿日期:2003-09-16 出版日期:2004-02-24 发布日期:2004-02-24
  • 通讯作者: 李旦振(1952年出生),男,教授,博士生导师,从事半导体光催化、纳米光电材料的研究.E-mail;dzli@fzu.edu.cn E-mail:dzli@fzu.edu.cn
  • 基金资助:

    国家自然科学基金重点项目(批准号;20133010);国家自然科学基金(批准号;20073007,20273014);教育部科技重点项目(批准号;03061);福建省自然科学基金重大项目(批准号;2003F004);福建省教育厅重点项目基金(批准号;JA02138)

Visible Light Induced Photocatalytic Oxidation of Ethylene over Pt/Pt 4+-TiO2 Catalyst

CHEN Yi-Lin, LI Dan-Zhen, FU Xian-Zhi, LIU Ping   

  1. Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • Received:2003-09-16 Online:2004-02-24 Published:2004-02-24

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关键词: 可见光, 光催化, 乙烯, Pt/Pt4+-TiO2

Abstract: Pt/Pt4+-TiO2 photocatalyst prepared by a modified sol-gel process was investigated by X-ray diffraction, UV-Vis diffuse reflectance spectra, X-ray photoelectron spectroscopy, time-resolved photoconductivity and terephthalic acid fluorescence probing. The photocatalytic activities of catalysts were evaluated by using ethylene oxidation studies under visible light irradiation(λ>450 nm) from 40 to 62 ℃. It is found that the platinum doping in titania caused significant absorption shift to the visible region and the surface recombination of photogenerated carriers was inhibited. The results show that ethylene was not converted on conventional TiO2 while the conversion was 90% and the complete mineralization was achieved over Pt-Pt4+/TiO2 at 62 ℃ in our experiment. Besides the exponential increase of thermalcatalytic activity, pure photocatalytic activity of the planitized sample enhanced linearly with the increase of temperature.

Key words: Visible light, Photocatalysis, Ethylene, Pt/Pt4+-TiO2

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