无机材料学报2001，Vol.16Issue(1)：98-102,5.
TiO2在MCM-41内表面单层及双层分散的结构表征
Preperation and Characterization of Monolayered or Two-layered Titania Modified Mesoporous Molecular Sieves MCM-41
摘要
Abstract
Abstract: Two kinds of titania modified the inner surface of mesoporous slilcate MCM-41 (MCM-TiO2 and MCM-Ti-TiO2) were synthesized by precursor tetrabutyltitanate and calcined MCM-41. The samples were characterized by XRD, FTIR, nitrogen adsorption/desorption at 77K and solid state diffuse reflectance UV-vis spectroscopy. XRD suggested that a long-range a long-range order kept in the hexagonal phase of titania modified MCM-41. Tetrabutyltitanate cocondensation with the pendant OH groups of MCM-41 via Si-O-Ti bonds and titania modified the inner walls of MCM-41. Titania on the inner walls ofmodified MCM-41 was estimated monolayer or two-layer according to the results of nitrogen adsorption/desorption isotherms. In UV-vis spectra, titania modified MCM-41 had significant blue shift compared to bulk TiO2 which is attributed to the well known quantum size effect for semiconductor as the particle size decreases.关键词
介孔分子筛/MCM-41/分散/TiO2分类
化学化工引用本文复制引用
郑珊,高濂,郭景坤..TiO2在MCM-41内表面单层及双层分散的结构表征[J].无机材料学报,2001,16(1):98-102,5.
