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纳米Au团簇在氧化钛修饰的介孔分子筛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:2001-03-16 修回日期:2001-04-09 出版日期:2002-03-20 网络出版日期:2002-03-20

Synthesis and Structure Characterization of Nanosized Au Clusters on Titania-Modified Mesoporous MCM-41

ZHENG Shan; GAO Lian; GUO Jing-Kun   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2001-03-16 Revised:2001-04-09 Published:2002-03-20 Online:2002-03-20

摘要: 以钛酸丁酯为TiO前驱体,使TiO均匀分散于纯硅介孔分子筛MCM-41的介孔孔道内表面,利用TiO光学性质将AuCl-4还原为Au(0)并组装于氧化钛修饰的MCM-41孔道中.对所合成的Au负载的氧化钛修饰的MCM-41进行了XRD,XPS,N吸附-脱附曲线,及固体UV-Vis漫反射等多种结构表征.由XPS谱和固体UV-Vis漫反射吸收光谱的plasmon吸收峰证明Au团簇呈现0价的金属状态.

关键词: Au团簇, TiO2修饰的, MCM-TiO2/Au

Abstract: Titania modified mesoporous slilcate MCM-41 (MCM-TiO2) was synthesized by precursor tetrabutyltitanate
and calcined MCM-41. Au clusters deposited on the inner surface of titania-modified MCM-41 by the photodeposition method through AuCl-4 and
MCM-TiO2 reaction. The structure and optical properties of the as-synthesized samples were investigated by XRD, XPS, N2 adsorption/
desorption isotherms and diffuse reflectance UV-Vis absorbance spectroscopy. The decrease of BET surface areas and the pore volume proved that nanosized
Au clusters deposited in the mesopore of MCM-TiO2. The Au 4f of XPS and the plasmon absorption in UV-Vis spectrum showed that the deposited Au was
in metal state.

Key words: Au clusters: titania-modified MCM-41, Au deposited titania-modified MCM-41

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