REACTIVITY OF NANOSIZED IRON-VANADIUM SPINELS TOWARDS OXYGEN AND CATION DISTRIBUTION

Authors
NIVOIX V PERRIAT P TAILHADES P GILLOT B
Citation
V. Nivoix et al., REACTIVITY OF NANOSIZED IRON-VANADIUM SPINELS TOWARDS OXYGEN AND CATION DISTRIBUTION, Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 325(5), 1997, pp. 279-286
Citations number
13
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie → ACNP
ISSN journal
12518069
Volume
325
Issue
5
Year of publication
1997
Pages
279 - 286
Database
ISI
SICI code
1251-8069(1997)325:5<279:RONIST>2.0.ZU;2-O
Abstract
Because of the division state of nanosized iron-vanadium spinels, iron and vanadium ions are oxidized within the spinel structure. Calorimet ric and thermogravimetric analyses, such as infrared spectroscopy, sha w that Fe-B(2+), V-B(3+) and Fe3+ are successively oxidized into Fe3and V5+ ions below 450 degrees C The mixed valency cation-deficient sp inels resulting from these oxidations have a vacancy content that incr eases with x, which may be higher than those found as yet for this typ e of oxide.