期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1036, 期 2, 页码 113-118出版社
ELSEVIER
DOI: 10.1016/j.chroma.2004.02.076
关键词
water analysis; adsorbents; surfactant extraction; cyclodextrins; humic acid
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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