高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (3): 443.

• 研究论文 • 上一篇    下一篇

C2H4的微波场助气相光催化氧化

郑宜1, 李旦振1,2, 付贤智1   

  1. 1. 福州大学光催化研究所;
    2. 福州大学电子系, 福州 350002
  • 收稿日期:2000-03-30 出版日期:2001-03-24 发布日期:2001-03-24
  • 通讯作者: 付贤智(1957年出生),男,博士,教授,博士生导师,主要从事光催化研究.E-mail:xzfu@fzu.edu.cn E-mail:xzfu@fzu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29843003);福建省自然科学基金(B9820001)资助

Microwave-assisted Heterogeneous Photocatalytic Oxidation of Ethylene

ZHENG Yi1, LI Dan-Zhen1,2, FU Xian-Zhi1   

  1. 1. Research Institute of Photocatalysis;
    2. Dept. of Electronic Science, Fuzhou University, Fuzhou 350002, China
  • Received:2000-03-30 Online:2001-03-24 Published:2001-03-24

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摘要： 用溶胶-凝胶法制备了多孔性TiO2和SO42-/TiO2催化剂,对其结构进行了表征,并以C2H4为模型反应物考察了微波对催化剂的光催化氧化反应性能的影响.在微波场中TiO2和SO42-/TiO2催化剂的光催化氧化性能得到明显改善,无微波场时乙烯转化率分别为20%(TiO2)和41%(SO42-/TiO2),而在微波辐射和紫外光的同时作用下乙烯转化率分别提高到27%和62%,SO42-/TiO2催化剂的微波场助效应更为显著.

关键词: 纳米二氧化钛, 光催化氧化, 微波, 乙烯

Abstract: Porous TiO2 and SO42-/TiO2 catalysts were prepared by sol-gel method and charaterized by XRD, N2 sorption analysis applying BETmethod, and microwave absorption spectrum. Photocatalytic oxidation of C2H4 in air stream was studied. The results showed that the photocatalytic activity of both SO42-/TiO2 and TiO2 catalysts was obviously increased under the reaction condition of ultraviolet combined with microwave. The conversions of ethylene over TiO2 and SO42-/TiO2 were enhanced from 20% and 41%(UV) to 27% and 62%(UV+MW), respectively. The effect of MWon SO42-/TiO2 catalyst was more notable. The improvement on photocatalytic activity was attributed to the polarization effect of the highly defected catalysts in microwave field, which increased the transition probability of photon generated electrons and decreased the electron-hole recombination on semiconductor surface.

Key words: Nano-titania, Photocatalytic oxidation, Microwave, Ethylene

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