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Synthesis of cerium oxide-based nanostructures in near- and supercritical fluids

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSLOSTOWSKI, Cédric
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARRE, Samuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorAYMONIER, Cyril
dc.date.issued2013
dc.identifier.issn0896-8446
dc.description.abstractEnCerium-oxide based nanostructures attract increasing interest for their use in multiple applications. In particular, the substitution of Ce atoms by other elements with lower oxidation state is used to control oxygen vacancies within the oxide structures, which can greatly enhance the material properties for catalysis applications. Among the synthesis approaches, supercritical water (scH2O) has been proved to be an extremely efficient media for the fast and facile elaboration of pure CeO2 nanostructures, although substitution was little investigated with this method (precursors' reactivity, mechanisms, etc.). Here, the influence of two cerium precursors - Ce(NO3)3*6H2O and Ce(NO3)6(NH4)2 - in scH2O synthesis was first investigated over the CeO2 nanostructures synthesis process. Cerium ammonium nitrate was later used as precursor for the synthesis of Ce1−x−yAxByO2−δ (A, B = Zr, Pr and/or La; 0 ≤ x, y ≤ 0.1). Supported by ICP analysis quantification, this study proposes an overview of the influences of residence time, temperature and precursors' concentration over the proportion of the substitution element in the CeO2 NCs. This work demonstrates a fast and simple process to Ce1−x−yAxByO2−δ nanostructures synthesis using scH2O synthesis.
dc.language.isoen
dc.publisherElsevier
dc.subjectCerium oxide
dc.subjectNanoparticles
dc.subjectSupercritical fluids
dc.subjectContinuous process
dc.subjectSubstitution
dc.title.enSynthesis of cerium oxide-based nanostructures in near- and supercritical fluids
dc.typeArticle de revue
dc.identifier.doi10.1016/j.supflu.2013.09.014
dc.subject.halChimie/Matériaux
dc.subject.halChimie/Chimie inorganique
bordeaux.journalJournal of Supercritical Fluids
bordeaux.page89-97
bordeaux.volume84
bordeaux.peerReviewedoui
hal.identifierhal-00877938
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00877938v1
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