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http://hdl.handle.net/10773/26978
Título: | New polyoxometalate-functionalized cellulosic fibre/silica hybrids for environmental applications |
Autor: | Gamelas, J. A. F. Evtyugina, M. G. Portugal, I. Evtuguin, D. V. |
Data: | 2012 |
Editora: | Royal Society of Chemistry |
Resumo: | Cellulosic fibre/silica hybrid materials functionalized with Keggin-type polyoxometalates ([PV2Mo10O40]52, [PVMo11O40]42, ([PMo12O40]32 or [PW12O40]32) 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]42 shows particularly high activity towards the oxidation of volatile organic compounds (VOCs) present in urban air thus anticipating future environmental applications. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/26978 |
DOI: | 10.1039/C1RA00371B |
ISSN: | 2046-2069 |
Aparece nas coleções: | CESAM - Artigos CICECO - Artigos DAO - Artigos DQ - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Gamelas et al. - 2012 - New polyoxometalate-functionalized cellulosic fibr.pdf | 689.26 kB | Adobe PDF | Ver/Abrir |
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