纳米Au团簇在氧化钛修饰的介孔分子筛MCM-41中的组装  

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

作　　者：郑珊[1] 高濂[1] 郭景坤[1] 

机构地区：[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

出　　处：《无机材料学报》2002年第2期332-336,共5页Journal of Inorganic Materials

摘　　要：以钛酸丁酯为ＴｉＯ２前驱体，使ＴｉＯ２均匀分散于纯硅介孔分子筛ＭＣＭ－４１的介孔孔道内表面，利用ＴｉＯ２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，Ｎ２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．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.

关 键 词：氧化钛修饰 介孔分子筛 MCM-41 组装 Au团簇 

分 类 号：TQ426[化学工程] O643.36[理学—物理化学]