Microporosity and connections between pores in SBA-15 mesostructured silicas as a function of the temperature of synthesis

被引：495
作者：
Galarneau, A
Cambon, N
Di Renzo, F
Ryoo, R
Choi, M
Fajula, F
机构：
[1] Ecole Natl Super Chim Montpellier, Lab Mat Catalyt & Catalyse Chim Organ, CNRS, UMR 5618, F-34296 Montpellier 5, France
[2] Korea Adv Inst Sci & Technol, Dept Chem, Natl Creat Res Initiat Ctr Funct Mat, Sch Mol Sci BK21, Taejon 305701, South Korea
来源：
NEW JOURNAL OF CHEMISTRY | 2003年 / 27卷 / 01期
关键词：
D O I：
10.1039/b207378c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Imaging of the platinum replica of the porous structure and low-pressure argon adsorption allowed us to elucidate the complicated porous structure of SBA-15. These techniques enabled us to draw a coherent picture of the evolution of the SBA-15 precursor mesophase as a function of the synthesis temperature. TEM of the platinum replicas has been unable to show bridges between the structural mesopores of SBA-15 synthesized at low temperature, whereas mesoporous bridges are clearly observed for samples formed at higher temperature. Argon adsorption has evidenced the ultramicroporosity of the materials formed at low temperature, as well as its evolution to secondary porosity with diameters greater than 1.5 nm under more severe hydrothermal treatment.
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页码：73 / 79
页数：7
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