Impact of phase composition on water adsorption on inorganic hybrids "salt/silica"

被引：58

作者：

Gordeeva, Larisa G. ^{[1
]}

Glaznev, Ivan S. ^{[1
]}

Savchenko, Elena V. ^{[1
]}

Malakhov, Vladislav V. ^{[1
]}

Aristov, Yuri I. ^{[1
]}

机构：

[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2006年 / 301卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

composites "salt/silica; mesoporous silica gel; inorganic salts; surface interaction; metal cation adsorption; water adsorption;

D O I：

10.1016/j.jcis.2006.05.009

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：

The effect of a "guest-host" interaction on the phase composition and sorption properties of the composite sorbents "salt in a porous host matrix" has been studied. The matrix was a mesoporous silica of KSK type, while the confined salts were CaCl(2), CuSO(4), MgSO(4), and Na(2)SO(4). Both structure and properties of the composites were studied by X-ray diffraction, titration in the pH range of 2-9, differential dissolution, and TG techniques. Chemical interaction between the silica surface and the salt during preparation results in the formation of the salt surface complexes and stabilization of the dispersed salt in two phases, namely, a crystalline phase and an X-ray amorphous phase. The water sorption properties of the composites depend on the phase composition and can be intently modified by using variation of the preparation conditions. (c) 2006 Elsevier Inc. All rights reerved.

引用

页码：685 / 691

页数：7

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