Organic dye adsorption on mesoporous hybrid gels

被引：83
作者：
Wu, ZJ
Joo, H
Ahn, LS
Haam, S
Kim, JH
Lee, K
机构：
[1] Yonsei Univ, Dept Chem Engn, Seoul 120749, South Korea
[2] Huaqiao Univ, Coll Mat Sci & engn, Quanzhou 362011, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2004年 / 102卷 / 03期
基金：
新加坡国家研究基金会;
关键词：
adsorption; organic dye; mesoporous; hybrid gel; adsorption isotherm; hydrophobic interaction;
D O I：
10.1016/j.cej.2004.05.008
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Adsorption of two organic dyes (alizarin red S and phenol red) on mesoporous silica and hybrid gels is investigated. The mesoporous gels are derived from tetraethoxysilane (TEOS), methyltriethoxysilane (MTES), vinyltriethoxysilane (WES), propyltriethoxysilane (PTES), and phenyltriethoxysilane (PhTES). The experimental results demonstrate that the adsorption capacity of the hybrid gels is much higher than that of the pure silica gel and increases as the gel surface becomes more hydrophobic. This suggests that the organic dye adsorption is governed mainly by the hydrophobic interaction between the organic dyes and the gel surface. Langmuir and Toth isotherm models are also tested against the experimental isotherm data. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：277 / 282
页数：6
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