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Nanostructured Al-based fluoride-oxide materials with core-shell morphology

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDAMBOURNET, Damien
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMOURGUES, Alain
hal.structure.identifierLaboratoire des oxydes et fluorures [LdOF ]
hal.structure.identifierInstitut de recherche en ingénierie moléculaire et matériaux fonctionnels de l'université du Maine [IRIMMFUM]
dc.contributor.authorMARTINEAU, Charlotte
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAJIMEL, Jérôme
hal.structure.identifierInstitut für Chemie
dc.contributor.authorFEIST, Michael
hal.structure.identifierLaboratoire des oxydes et fluorures [LdOF ]
hal.structure.identifierInstitut de recherche en ingénierie moléculaire et matériaux fonctionnels de l'université du Maine [IRIMMFUM]
dc.contributor.authorLEGEIN, Christophe
hal.structure.identifierInstitut de recherche en ingénierie moléculaire et matériaux fonctionnels de l'université du Maine [IRIMMFUM]
hal.structure.identifierLaboratoire de physique de l'état condensé [LPEC]
dc.contributor.authorBUZARÉ, Jean-Yves
hal.structure.identifierConditions Extrêmes et Matériaux : Haute Température et Irradiation [CEMHTI]
dc.contributor.authorFAYON, Franck
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRESSAUD, Alain
dc.date.issued2008
dc.identifier.issn1932-7447
dc.description.abstractEnThe investigation of the thermal behavior of β-AlF2.6OH0.4 compound which adopts the hexagonal tungsten bronze network shows that this structure is stable up to 873 K. As revealed by a detailed analysis combining high resolution transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and 19F and 27Al MAS NMR, the sample annealed at 873 K exhibits an unusual core−shell like morphology. The shell which is amorphous contains some AlO6, AlO5, and AlO4 species which have been identified and quantified by 27Al NMR. Contrarily, the core part of the material is crystallized and has been identified as a phase closely related to the hydroxyl free compound β-AlF3 in agreement with the dehydroxylation process. The annealing treatment lowers the Lewis acidity, but strong Brønsted acid sites have been created as evidenced by pyridine adsorption. These strong Brønsted sites arise from the reaction between water and strongly under-coordinated species formed upon annealing. It should be pointed out that such core−shell morphology had never been observed in fluoride or oxide-fluoride systems, so far.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enNanomaterials
dc.subject.enNanostructure
dc.subject.enFluorine
dc.subject.enOxides
dc.subject.enCore-shell
dc.subject.enMorphology
dc.subject.enAluminium
dc.title.enNanostructured Al-based fluoride-oxide materials with core-shell morphology
dc.typeArticle de revue
dc.identifier.doi10.1021/jp801310e
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Physical Chemistry C
bordeaux.page12374–12380
bordeaux.volume112
bordeaux.issue32
bordeaux.peerReviewedoui
hal.identifierhal-00319785
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00319785v1
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