Issue 3, 2012
From the journal:

RSC Advances

New polyoxometalate-functionalized cellulosic fibre/silica hybrids for environmental applications

J. A. F. Gamelas,*a   M. G. Evtyugina,b   I. Portugalc  and  D. V. Evtuguin*c  

* Corresponding authors

a CIEPQPF and Department of Chemical Engineering, University of Coimbra, Pólo II—R. Sílvio Lima, Coimbra, Portugal
E-mail: jafgas@eq.uc.pt (J. A. F. Gamelas)

b CESAM and Department of Environment and Planning, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal

c Department of Chemistry and CICECO, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
E-mail: dmitrye@ua.pt (D. V. Evtuguin)

Abstract

Cellulosic fibre/silica hybrid materials functionalized with Keggin-type polyoxometalates ([PV2Mo10O40]5−, [PVMo11O40]4−, ([PMo12O40]3− or [PW12O40]3−) were prepared by a sol–gel method at room temperature. The novel materials are composed of ca. 56 wt% of polysaccharides, ca. 37 wt% of propylamine-modified silica, 2 wt% of polyoxometalate, and 5% of hydration water. The silica network of these hybrids exhibits relatively high degree of condensation being distributed mainly on the surface of the cellulosic fibres as a dense film. The functionalization of silica with polyoxometalates via electrostatic interactions with protonated propylamino groups of modified silica was unambiguously confirmed. Despite their high silica content cellulose/silica hybrids retained basic cellulosic pulp properties—supramolecular and fibrous structure, porosity, relatively low density, etc. The novel bio-based material functionalized with 2% of [PVMo11O40]4− shows particularly high activity towards the oxidation of volatile organic compounds (VOCs) present in urban air thus anticipating future environmental applications.

Graphical abstract: New polyoxometalate-functionalized cellulosic fibre/silica hybrids for environmental applications

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Article information

DOI
https://doi.org/10.1039/C1RA00371B
Article type
Paper
Submitted
27 Jun 2011
Accepted
09 Oct 2011
First published
24 Nov 2011

RSC Adv., 2012,2, 831-839

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New polyoxometalate-functionalized cellulosic fibre/silica hybrids for environmental applications

J. A. F. Gamelas, M. G. Evtyugina, I. Portugal and D. V. Evtuguin, RSC Adv., 2012, 2, 831 DOI: 10.1039/C1RA00371B

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