Advanced mesoporous organosilica material containing microporous β-cyclodextrins for the removal of humic acid from water

被引：33
作者：
Liu, CQ [1 ]
Naismith, N [1 ]
Economy, J [1 ]
机构：
[1] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
来源：
JOURNAL OF CHROMATOGRAPHY A | 2004年 / 1036卷 / 02期
基金：
美国国家科学基金会;
关键词：
water analysis; adsorbents; surfactant extraction; cyclodextrins; humic acid;
D O I：
10.1016/j.chroma.2004.02.076
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
A new mesoporous organosilica material (beta-CD-Silica-4%) containing microporous beta-cyclodextrins (beta-CDs) has been prepared by the co-polymerization of a silylated beta-CD monomer with tetraethoxysilane in the presence of a structure-directing template, cetyltrimethylammonium bromide. Solid-state C-13 and Si-29 NMR studies provided evidence for the presence of covalently attached beta-CDs in the mesoporous material. Nitrogen adsorption experiments showed that beta-CD-Silica-4% material had a BET surface area of 460 m(2)/g and an average mesopore diameter of 2.52nm. Small-angle powder X-ray diffraction pattern of beta-CD-Silica-4% material revealed the lack of highly ordered mesoporous structure. Adsorption experiments showed that beta-CD-Silica-4% material removed up to 99% of humic acid from an aqueous solution containing 50 ppm of humic acid at a solution-to-solid ratio of 100 ml/g. (C) 2004 Elsevier B.V. All rights reserved.
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收藏
页码：113 / 118
页数：6
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