authors |
Gamelas, JAF; Evtyugina, MG; Portugal, I; Evtuguin, DV |
nationality |
International |
journal |
RSC ADVANCES |
keywords |
SOL-GEL PROCESS; KEGGIN ANIONS; SILICA; COMPOSITES; SURFACE; CLUSTERS; SPECTROSCOPY; CHEMISTRY; CATALYSIS; ACETATE |
abstract |
Cellulosic fibre/silica hybrid materials functionalized with Keggin-type polyoxometalates ([PV(2)Mo(10)O(40)](5-), [PVMo(11)O(40)](4-), ([PMo(12)O(40)](3-) or [PW(12)O(40)](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 [PVMo(11)O(40)](4-) shows particularly high activity towards the oxidation of volatile organic compounds (VOCs) present in urban air thus anticipating future environmental applications. |
publisher |
ROYAL SOC CHEMISTRY |
issn |
2046-2069 |
year published |
2012 |
volume |
2 |
issue |
3 |
beginning page |
831 |
ending page |
839 |
digital object identifier (doi) |
10.1039/c1ra00371b |
web of science category |
Chemistry, Multidisciplinary |
subject category |
Chemistry |
unique article identifier |
WOS:000299177000015
|
ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
3.119 |
5 year journal impact factor |
3.098 |
category normalized journal impact factor percentile |
59.04 |
dimensions (citation analysis):
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altmetrics (social interaction):
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