Thermal stability and hydrophobicity of mesoporous silica FSM-16

被引：38

作者：

Matsumoto, A ^{[1
]}

Sasaki, T ^{[1
]}

Nishimiya, N ^{[1
]}

Tsutsumi, K ^{[1
]}

机构：

[1] Toyohashi Univ Technol, Fac Engn, Dept Mat Sci, Toyohashi, Aichi 4418580, Japan

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2002年 / 203卷 / 1-3期

关键词：

adsorption; calorimetry; FSM-16; heat of adsorption; mesoporous silica;

D O I：

10.1016/S0927-7757(01)01105-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermal stability and hydrophobic property of mesoporous silica, FSM-16, has been studied. The mesoporous structure of FSM-16 was stable against calcination up to 1073 K in vacuo, but collapsed at 1273 K. Adsorption isotherm and differential heat of adsorption measurements showed that the calcination temperature affected the hydrophobic nature of FSM-16, and that the surface changed to hydrophilic by hydroxylation of surface siloxane during water adsorption. Once the surface became hydrophilic, the hydrophobic character was never restored even after evacuation at 823 K. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：185 / 193

页数：9

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