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An X-ray absorption spectroscopy investigation of the formation of FeCo alloy nanoparticles in Al2O3 xerogel and aerogel Matrixes

Corrias, Anna, Navarra, Gabriele, Casula, Maria Francesca, Marras, Sergio, Mountjoy, Gavin (2005) An X-ray absorption spectroscopy investigation of the formation of FeCo alloy nanoparticles in Al2O3 xerogel and aerogel Matrixes. Journal of Physical Chemistry B, 109 . pp. 13964-13970. ISSN 1520-6106. (doi:10.1021/jp051193l) (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) (KAR id:9911)

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/10.1021/jp051193l

Abstract

Extended X-ray absorption fine structure and X-ray absorption near-edge structure techniques were used to study in detail the structural characteristics of FeCo-Al2O3 nanocomposite xerogels and aerogels. The fort-nation of bcc FeCo alloy, which cannot be assessed unambiguously by X-ray diffraction, dispersed within the alumina matrix was evidenced in the final samples obtained by heat treatment at 800 degrees C in reducing atmosphere. Aerogel samples reduced below 800 degrees C still present a fraction of oxidized metal together with the bcc alloy. The investigation of the xerogels and aerogels calcined at increasing temperature indicates that Fe(111) and Co(II) ions are present and they are located in the tetrahedral sites of the spinel structure of the matrix (gamma-Al2O3); moreover, the precursor of the spinel is more ordered in the aerogel sample than the xerogel sample.

Item Type: Article
DOI/Identification number: 10.1021/jp051193l
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 05 Sep 2008 22:03 UTC
Last Modified: 27 Jan 2020 04:01 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/9911 (The current URI for this page, for reference purposes)
Corrias, Anna: https://orcid.org/0000-0002-5190-8196
Mountjoy, Gavin: https://orcid.org/0000-0002-6495-2006
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