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金属Pt团簇在氧化钛修饰MCM-41中的组装

郑珊; 高濂; 郭景坤   

  1. 中国科学院上海硅酸盐研究所高性能结构陶瓷与超微结构国家重点实验室 上海 200050
  • 收稿日期:2000-12-14 修回日期:2001-01-08 出版日期:2001-11-20 网络出版日期:2001-11-20

Preparation and Structure Characterization of Pt Clusters on Titania Modified MCM-41

ZHENG Shan; GAO Lian; GUO Jing-Kun   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ce- ramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2000-12-14 Revised:2001-01-08 Published:2001-11-20 Online:2001-11-20

摘要: 采用光沉积的合成方法将纳米金属Pt组装于氧化钛修饰MCM-41孔道中,并对合成的样品进行了XRD、XPS、UV-vis、N2吸附-脱附等结构表征.光电子能谱表明组装的Pt呈金属状态;N吸附-脱附数据表明组装于孔道中的Pt虽然使MCM-41的BET比表面和孔容下降,但是由于Pt的组装量较小,使其对孔径分布的影响较小.由于Pt的引入,使其紫外-可见光漫反射吸收光谱与氧化钛修饰的MCM-41不同.

关键词: MCM-41, 氧化钛修饰的, MCM-TiO2/Pt, 光沉积法

Abstract: Pt clusters deposited on titania-modified MCM-41 were synthesized by a photodeposition method through PtCl62- and titania-modified MCM-41.
The structure and optical properties of the samples were investigated by XRD, XPS, N2 adsorption/desorption isotherms and diffuse reflectance
UV-Vis absorption spectroscopy. The results of XPS showed that the deposited Pt was in metal state. Although the BET surface areas and pore volume
decreased because of the introduction of Pt, the pore diameter distribution was almost not affected. The curve of Pt deposited titania modified MCM-41
in UV-Vis absorption spectrum was different from that of titania modified MCM-41.

Key words: MCM-41, titania modified MCM-41, MCM-TiO2/Pt, photodeposition

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