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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第2期332-336,共5页
Journal of Inorganic Materials
