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FeCo-SiO2 nanocomposite aerogels by high temperature supercritical drying

Casula, M.F., Corrias, A., Paschina, G. (2002) FeCo-SiO2 nanocomposite aerogels by high temperature supercritical drying. Journal of Materials Chemistry, 12 (5). pp. 1505-1510. ISSN 0959-9428. (doi:10.1039/b110093a) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1039/b110093a

Abstract

FeCo-SiO2 nanocomposite aerogels were prepared by high temperature supercritical drying of alcogels obtained using tetraethoxysilane, iron nitrate and cobalt nitrate as precursors. The structural evolution of the samples at the various stages of the preparation was studied by thermal analysis, transmission electron microscopy, nitrogen physisorption measurements and X-ray diffraction. Different experimental conditions of the supercritical drying process give rise to different porous structures in the silica matrix which have a strong influence on the formation of the FeCo alloy nanoparticles. Bcc FeCo alloy nanoparticles of the expected composition are obtained in the microporous samples while in the mesoporous samples a bcc alloy with a lower Co content is obtained which is accompanied by pure fcc Co.

Item Type: Article
DOI/Identification number: 10.1039/b110093a
Uncontrolled keywords: alloy, cobalt derivative, cobalt nitrate, iron, nitrogen, silane derivative, silicon dioxide, tetraethyl silicate, unclassified drug, article, gel, high temperature procedures, measurement, nanoparticle, porosity, temperature dependence, thermal analysis, transmission electron microscopy, X ray diffraction
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 17 Dec 2014 12:36 UTC
Last Modified: 29 May 2019 13:57 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46224 (The current URI for this page, for reference purposes)
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