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Research article2015Peer reviewedOpen access

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

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

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.

Keywords

Nanocomposite; Sol-gel method; Chitosan; Adsorption; Vanadium; Molybdenum; Chromium

Published in

Nanoscale Research Letters
2015, Volume: 10, article number: 87
Publisher: SPRINGER

    UKÄ Subject classification

    Chemical Process Engineering

    Publication identifier

    DOI: https://doi.org/10.1186/s11671-014-0722-1

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/84553