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溶胶-凝胶法制备壳聚糖-二氧化硅纳米复合材料的合成与吸附性能

Synthesis and adsorption properties of chitosan-silica nanocomposite prepared by sol-gel method.

作者信息

Budnyak Tetyana M, Pylypchuk Ievgen V, Tertykh Valentin A, Yanovska Elina S, Kolodynska Dorota

机构信息

Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164 Kyiv, Ukraine.

Faculty of Chemistry, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Str., 01033 Kyiv, Ukraine.

出版信息

Nanoscale Res Lett. 2015 Feb 28;10:87. doi: 10.1186/s11671-014-0722-1. eCollection 2015.

DOI:10.1186/s11671-014-0722-1
PMID:25852383
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4385279/
Abstract

A hybrid nanocomposite material has been obtained by in situ formation of an inorganic network in the presence of a preformed organic polymer. Chitosan biopolymer and tetraethoxysilane (TEOS), which is the most common silica precursor, were used for the sol-gel reaction. The obtained composite chitosan-silica material has been characterized by physicochemical methods such as differential thermal analyses (DTA); carbon, hydrogen, and nitrogen (CHN) elemental analysis; nitrogen adsorption/desorption isotherms, scanning electron microscopy (SEM); and Fourier transform infrared (FTIR) spectroscopy to determine possible interactions between silica and chitosan macromolecules. Adsorption of microquantities of V(V), Mo(VI), and Cr(VI) oxoanions from the aqueous solutions by the obtained composite has been studied in comparison with the chitosan beads, previously crosslinked with glutaraldehyde. The adsorption capacity and kinetic sorption characteristics of the composite material were estimated.

摘要

通过在预先形成的有机聚合物存在下原位形成无机网络，获得了一种杂化纳米复合材料。壳聚糖生物聚合物和四乙氧基硅烷（TEOS，最常见的二氧化硅前体）用于溶胶 - 凝胶反应。所得的壳聚糖 - 二氧化硅复合材料已通过物理化学方法进行表征，如差热分析（DTA）、碳、氢和氮（CHN）元素分析、氮吸附/解吸等温线、扫描电子显微镜（SEM）以及傅里叶变换红外（FTIR）光谱，以确定二氧化硅与壳聚糖大分子之间可能的相互作用。与先前用戊二醛交联的壳聚糖珠相比，研究了所得复合材料对水溶液中微量V(V)、Mo(VI)和Cr(VI)含氧阴离子的吸附。估计了该复合材料的吸附容量和动力学吸附特性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/c2de37f3c33a/11671_2014_722_Fig10_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/be8e59f946bb/11671_2014_722_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/4c42285b72f1/11671_2014_722_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/c2de37f3c33a/11671_2014_722_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/873aa4b9d9dd/11671_2014_722_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/c240530e178a/11671_2014_722_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/71d5ee99b335/11671_2014_722_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/ef6be80a1c42/11671_2014_722_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/29dc46f2aac8/11671_2014_722_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/133632cdc0b5/11671_2014_722_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/bbe89cc26cc9/11671_2014_722_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/be8e59f946bb/11671_2014_722_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/4c42285b72f1/11671_2014_722_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6de7/4385279/c2de37f3c33a/11671_2014_722_Fig10_HTML.jpg

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