高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (1): 54.

• 研究论文 • 上一篇    下一篇

激光喇曼光谱法测定MoO3在载体表面的单层分散容量

赵璧英1, 徐强1, 谢有畅1, 杨先春2   

  1. 1. 北京大学物理化学研究所;
    2. 石油化工科学研究院
  • 收稿日期:1988-04-12 出版日期:1990-01-24 发布日期:1990-01-24
  • 通讯作者: 赵璧英
  • 基金资助:

    国家自然科学基金,北京大学结构化学开放实验室课题006号

Laser Raman Spectrometric Determination of the Monolayer Dispersion Capacities of MoO3 on Supports

Zhao Biying1, Xu Qiang1, Xie Youchang1, Yang Xianchun2   

  1. 1. Institute of Physical Chemistry, Peking University, Beijing;
    2. Research Institute of Petroleum Processing, Beijing
  • Received:1988-04-12 Online:1990-01-24 Published:1990-01-24

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摘要： 用激光喇曼光谱法测定了MoO3/γ-Al2O3、MoO3/TiO2和MoO3/SiO2中聚集态MoO3量和负载量的关系。外推得出的单层分散容量与从XRD、XPS及表面酸性测定中得出的结果相符,因而为MoO3在载体表面单层分散的观点提供了直接的证据。从LRS谱中还得出一些XPS、XRD未能得出的结构信息。对LRS定量中遇到的一些问题、起因及解决办法也进行了讨论。

关键词: 激光喇曼光谱, LRS定量测定, 负载型MoO3催化剂, 单层分散容量

Abstract: The relationship between aggregative MoO3 and total MoO3 loading in MoO3/γ-Al2O3, MoO3/TiO2 and MoO3/SiO2 was determined by LRS. KNO3 was used as the internal standard for the measurement of intensities. The obtained monolayer dispersion capacities by extrapolation correspond to those obtained by XPS, XRDand surface acidity measurement.Raman spectrometry can be used to indentify all molybdenum oxide species, for example the aggregative MoO3 fine particles, Al2(MoO4)3 and two dimensional Mo interaction species (monolayer dispersed MoO3). So this result is a direct and convincible evidence for the view of monolayer dispersion. Some informations about the structure of catalysts supporting MoO3 have been obtained by LRS, which was not obtained by XPS, XRD. The trouble in the quantitative LRSdetermination for catalysts, its cause and the method to overcome it are also discussed.

Key words: Laser Raman Spectra, LRS quantitative determination, Supported MoO3 catalysts, Mono- layer dispersion capacity

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