高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (5): 871.

• 研究论文 • 上一篇    下一篇

ZnO超微粒子光催化氧化降解n-C7H16的研究

井立强1, 孙晓君2, 蔡伟民2, 徐自力1, 杜尧国3, 王玲3, 周秀清3, 单洪岩1   

  1. 1. 哈尔滨工业大学环境科学与工程系, 哈尔滨 150001;
    2. 吉林大学环境科学与工程系, 长春 130023;
    3. 吉林大学分析测试实验中心, 长春 130023
  • 收稿日期:2001-04-16 出版日期:2002-05-24 发布日期:2002-05-24
  • 通讯作者: 井立强(1973年出生),男,博士研究生,从事环境污染与防治研究.E-mail:jlqiang@sohu.com E-mail:jlqiang@sohu.com

Investigation on Photocatalytic Oxidation Degradation of n-C7H16 over ZnO Ultrafine Particles

JING Li-Qiang1, XU Zi-Li2, DU Yao-Guo2, SUN Xiao-Jun1, WANG Ling3, ZHOU Xiu-Qing3, SHAN Hong-Yan3, CAI Wei-Min1   

  1. 1. Department of Environmental Sciences and Engineering, Harbin University of Technology, 150001, China;
    2. Department of Environmental Sciences and Engineering;
    3. Analysis Testing and Experimental Center, Jilin University, Changchun 130023, China
  • Received:2001-04-16 Online:2002-05-24 Published:2002-05-24

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摘要： 利用ZnO光催化氧化技术对气相n－C7H16进行了降解研究,考察了氧气、水蒸气体积分数等因素对n－C7H16光催化氧化的影响.利用气相色谱－质谱联用仪和气相色谱仪对气相光催化反应过程中的气体组成进行了定性分析,并对主要中间产物丙醛进行了定量分析,结果发现,ZnO超微粒子光催化氧化n－C7H16的降解率较高,n－C7H16绝大部分被完全氧化成CO2,探讨了n－C7H16光催化氧化反应的动力学行为及机理.

关键词: n－C7H16, 氧化锌, 超微粒子, 光催化氧化, 反应动力学和机理

Abstract: The degradation of gas-phase n-C7H16 by the technique of photocatalytic oxidation on ZnO wasinvestigated.It was found that under a certain condition of reaction, the photocatalytic oxidation degrada-tion rate of n-C7H16 on ZnO ultrafine particles (UFP) was higher.The influences of some factors such as O2 volume fraction and H2O(g) volume fraction on photocatalytic oxidation of n-C7H16 were studied.The gascomposition during photocatalytic oxidation of n-C7H16 was qualitatively analyzed by using gas chromatog-raphy (GC ) and gas chromatogram-mass spectrum (GC-MS), and the principal intermediate product,propanal, was quantitatively analyzed, which could demonstrate that the most part of n-C7H16 degraded byphotocatalytic oxidation on ZnOwas oxided to CO2. In addition, the kinetics and mechanism of photo-catalytic oxidation reaction of n-C7H16 were also probed into.

Key words: n-C7H16, ZnO, Ultrafine particles, Photocatalytic oxidation, Kinetics and mechanism

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