The decomposition of the layered double hydroxides of Co and Al: phase segregation of a new single phase spinel oxide.
Identifieur interne : 000059 ( Main/Exploration ); précédent : 000058; suivant : 000060The decomposition of the layered double hydroxides of Co and Al: phase segregation of a new single phase spinel oxide.
Auteurs : Salem Babay [Tunisie] ; Alain Bulou [France] ; Anne Marie Mercier [France] ; Mouhamed Toumi [Tunisie]Source :
- Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [ 1873-3557 ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Aluminum, Aluminum Oxide, Cobalt, Hydroxides, Magnesium Oxide, Oxides.
- Spectroscopy, Fourier Transform Infrared, Spectrum Analysis, Raman, Static Electricity, Temperature, Vibration, X-Ray Diffraction.
Abstract
Monophasic Co-Al-CO3-like layered double hydroxides has been prepared by the coprecipitation method. It has been characterised by Rietveld refinement of the X-ray powder diffraction pattern, DTA-TGA, infrared and Raman spectroscopies. Its structure is trigonal, R3̅m with cell parameters a=0.3061(4) nm and c=2.252 (3) nm. The decomposition of this hydrotalcite-like structure on heating up to 800 °C yields to a single phase spinel oxide. Besides, infrared and Raman spectroscopies showed the presence of spinel-like domains. The results of Rietveld refinement have revealed that this compound has the Fd3̅m space group (a=0.8088(4) nm), with crystallographic formula [Co(II)0.75Al0.25](8a)[Co(II)0.252Co(III)0.77Al0.98](16d)O4, which is of the general formula Co1.77Al1.23O4. This structure is also validated by the charge distribution (CD) analysis.
DOI: 10.1016/j.saa.2015.01.021
PubMed: 25659816
Affiliations:
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Electronic address: salem.babay@yahoo.fr.</nlm:affiliation><country xml:lang="fr">Tunisie</country><wicri:regionArea>Laboratory of the Physico-Chemistry of Solid States, LR11 ES51, University of Sfax, Road of Soukra km 4, Sfax 3038</wicri:regionArea><wicri:noRegion>Sfax 3038</wicri:noRegion></affiliation></author><author><name sortKey="Bulou, Alain" sort="Bulou, Alain" uniqKey="Bulou A" first="Alain" last="Bulou">Alain Bulou</name><affiliation wicri:level="1"><nlm:affiliation>LUMAN Université, Université du Maine, CNRS UMR 6283, Institut des Molécules et Materiaux du Mans (IMMM), Avenue O. Messiaen, 7285 LE MANS Cedex 9, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>LUMAN Université, Université du Maine, CNRS UMR 6283, Institut des Molécules et Materiaux du Mans (IMMM), Avenue O. 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It has been characterised by Rietveld refinement of the X-ray powder diffraction pattern, DTA-TGA, infrared and Raman spectroscopies. Its structure is trigonal, R3̅m with cell parameters a=0.3061(4) nm and c=2.252 (3) nm. The decomposition of this hydrotalcite-like structure on heating up to 800 °C yields to a single phase spinel oxide. Besides, infrared and Raman spectroscopies showed the presence of spinel-like domains. The results of Rietveld refinement have revealed that this compound has the Fd3̅m space group (a=0.8088(4) nm), with crystallographic formula [Co(II)0.75Al0.25](8a)[Co(II)0.252Co(III)0.77Al0.98](16d)O4, which is of the general formula Co1.77Al1.23O4. This structure is also validated by the charge distribution (CD) analysis.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country></list><tree><country name="Tunisie"><noRegion><name sortKey="Babay, Salem" sort="Babay, Salem" uniqKey="Babay S" first="Salem" last="Babay">Salem Babay</name></noRegion><name sortKey="Toumi, Mouhamed" sort="Toumi, Mouhamed" uniqKey="Toumi M" first="Mouhamed" last="Toumi">Mouhamed Toumi</name></country><country name="France"><noRegion><name sortKey="Bulou, Alain" sort="Bulou, Alain" uniqKey="Bulou A" first="Alain" last="Bulou">Alain Bulou</name></noRegion><name sortKey="Mercier, Anne Marie" sort="Mercier, Anne Marie" uniqKey="Mercier A" first="Anne Marie" last="Mercier">Anne Marie Mercier</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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