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Interactions of Sn2+ dopant ions located on surface sites of anatase-type TiO2 with adsorbed H2S molecules studied using 119Sn Mössbauer spectroscopic probe

hal.structure.identifierDepartment of Chemistry
dc.contributor.authorFABRITCHNYI, Pavel B.
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorAFANASOV, Mikhail I.
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorASTASHKIN, R. A.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWATTIAUX, Alain
hal.structure.identifierPlateforme Aquitaine de Caractérisation des Matériaux [PLACAMAT]
dc.contributor.authorLABRUGÈRE, Christine
dc.date.issued2014
dc.identifier.issn0169-4332
dc.description.abstractEnInformation provided by 119Sn2+ Mössbauer probe ions, located on surface sites of anatase-type TiO2 microcrystals exposed, at room temperature, to a H2S/H2 mixture, has permitted to conclude that the interaction of H2S molecules with the substrate surface leads to the dissociation of a fraction of the absorbate molecules. This gives rise to the formation of elemental sulfur which oxidizes the neighboring Sn2+ ions, the produced Sn4+ ions being found coordinated only by S2− anions. Subsequent exposure to ambient air is shown to result in the oxidation of S2− ions, yielding both S0 and SO42−-like species, with concomitant stabilization of Sn4+ ions in coordination polyhedra where they are surrounded by only oxygen anions.
dc.language.isoen
dc.publisherElsevier
dc.subject.enSynthetic anatase
dc.subject.enTin dopant cations
dc.subject.en119Sn Mössbauer probe
dc.subject.enDissociative adsorption of H2S
dc.subject.enX-ray photoelectron spectroscopy
dc.title.enInteractions of Sn2+ dopant ions located on surface sites of anatase-type TiO2 with adsorbed H2S molecules studied using 119Sn Mössbauer spectroscopic probe
dc.typeArticle de revue
dc.identifier.doi10.1016/j.apsusc.2014.09.005
dc.subject.halChimie/Matériaux
bordeaux.journalApplied Surface Science
bordeaux.page482-486
bordeaux.volume320
bordeaux.peerReviewedoui
hal.identifierhal-01078367
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01078367v1
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