介孔材料
材料科学
化学工程
色谱法
化学
矿物学
有机化学
工程类
催化作用
作者
Mietek Jaroniec,Leonid A. Solovyov
出处
期刊:Langmuir
[American Chemical Society]
日期:2006-06-30
卷期号:22 (16): 6757-6760
被引量:280
摘要
In this work, the X-ray diffraction structure modeling was employed for analysis of hexagonally ordered large-pore silicas, SBA-15, to determine their pore width independently of adsorption measurements. Nitrogen adsorption isotherms were used to evaluate the relative pressure of capillary condensation in cylindrical mesopores of these materials. This approach allowed us to extend the original Kruk−Jaroniec−Sayari (KJS) relation (Langmuir 1997, 13, 6267) between the pore width and capillary condensation pressure up to 10 nm instead of previously established range from 2 to 6.5 nm for a series of MCM-41 and to improve the KJS pore size analysis of large pore silicas.
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