物理化学学报 >> 2001, Vol. 17 >> Issue (03): 270-272.doi: 10.3866/PKU.WHXB20010318

研究论文 上一篇    下一篇

微波法制备SO2-4/TiO2催化剂及其光催化氧化性能

李旦振;郑宜;傅贤智;刘平   

  1. 福州大学光催化研究所,福州　350002
  • 收稿日期:2000-10-08 修回日期:2000-11-09 发布日期:2001-03-15
  • 通讯作者: 傅贤智 E-mail:xzfu@fzu.edu.cn

SO2-4/TiO2 Catalyst Prepared by Microwave Method and the Research of its Photocatalytic Oxidation Activity

Li Dan-Zhen;Zheng Yi;Fu Xian-Zhi;Liu Ping   

  1. Research Institute of Photocatalysis,Fuzhou University,Fuzhou　350002
  • Received:2000-10-08 Revised:2000-11-09 Published:2001-03-15
  • Contact: Fu Xian-Zhi E-mail:xzfu@fzu.edu.cn

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摘要： 采用微波法、混合加热法和常规加热法制备/TiO2催化剂,运用XRD、BET、DRS及LRS光 谱测定等技术对催化剂的结构进行了表征,并以光催化降解C2H4为模型反应考察了不同制备 方法对催化剂的光催化氧化反应性能的影响.研究结果表明,微波法制备的/TiO2催化剂的光 催化氧化性能得到明显改善,对乙烯转化率为80％,而混合加热法和常规加热法制备的样品乙 烯转化率分别为58％和41％.微波辐射制备的催化剂锐钛矿相含量高、比表面积大,光吸收阈 值增大；并且拉曼散射光谱向低波数方向移动,有助于增加光致电子的跃迁几率,提高多相光 催化过程的本征量子效率.

关键词: 纳米二氧化钛, 光催化氧化, 微波, 乙烯

Abstract: /TiO2 catalysts were prepared by microwave,composite and conventional methods and characterized by Xray diffraction (XRD),N2 sorption analysis apply ing BET method,UVVis diffuse reflection spectroscopy(DRS) and laser Raman spec trum.The effect of different preparation methods on photocatalytic oxidation of C2H4 in air stream was studied.The results showed that the photocatalytic activi ty was obviously increased by the microwave method.The conversion of ethylene wa s 80％ contrast to those of composite and conventional methods being only 58％ a nd 41％,respectively.The catalyst by microwave method exhibited higher content o f anatase,higher specific surface area,larger band gap.The Raman scattering shif ted to low wave number direction helped to increase the transition probability o f photongenerated electrons and improved photoefficiency.

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