Molecular selective adsorption of alkylphenols and alkylanilines from water by alkyl-grafted mesoporous alumina: A comparative study to alkyl-grafted mesoporous silica

被引：24

作者：

Inumaru, Kei ^{[1
]}

Nakano, Tomoyasu ^{[1
]}

Yamanaka, Shoji ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2006年 / 95卷 / 1-3期

基金：

日本科学技术振兴机构;

关键词：

nanostructure; molecular recognition; mesoporous alumina; mesoporous silica; hydrophobicity; endocrine disrupter; organic-inorganic nanocomposite;

D O I：

10.1016/j.micromeso.2006.05.026

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Molecular selective adsorption of alkylphenols and alkylanilines onto n-alkyl-grafted mesoporous alumina was investigated and compared to that onto n-alkyl-grafted mesoporous silica. Water adsorption isotherms revealed that the hydrophilic nanospaces of the mesoporous alumina became highly hydrophobic after dodecyl-grafting. Alkylanilines and alkylphenols with a large alkyl group, such as 4-heptylaniline (HA) and 4-heptylphenol (HP), were preferentially adsorbed by dodecyl-grafted mesoporous alumina (C12-MPA). A comparison of the adsorption isotherms of HA on C12-MPA with those on octyl-grafted mesoporous silica (C8-MPS) revealed that the surface density of the HA molecule adsorbed on C12-MPA was much lower than that adsorbed on C8-MPS. The different adsorption properties of the alkyl-grafted alumina and alkyl-grafted silica can be explained by a mechanism in which adsorbed molecules fit into the nanostructure by interacting with both the organic hydrophobic nanospaces and the inorganic pore walls, i.e. organic-inorganic cooperative molecular recognition within the nanostructure. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：279 / 285

页数：7

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