XPS study on water corrosion of fluorzirconate glasses and their protection by a layer of surface modified tin dioxide nanoparticles

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dc.contributor.authorHammer, Peter [UNESP]
dc.contributor.authorRizzato, A. P.
dc.contributor.authorPulcinelli, Sandra Helena [UNESP]
dc.contributor.authorSantilli, Celso Valentim [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionRhodia Polimida & Especialidades
dc.date.accessioned2014-05-20T15:28:48Z
dc.date.available2014-05-20T15:28:48Z
dc.date.issued2007-05-01
dc.description.abstractThe surface corrosion process associated with the hydrolysis of fluorozirconate glass, Z-BLAN (53ZrF(4), 20BaF(2), 20NaF, 4LaF(2), 3AlF(3)), and the corrosion protection efficiency of a nanocrystalline transparent SnO2 layer were investigated by X-ray photoelectron spectroscopy. The tin oxide film was deposited by the sol-gel dip-coating process in the presence of Tiron(R) as particle surface modifier agent. The chemical bonding structure and composition of the surface region of coated and non-coated ZBLAN were studied before water contact and after different immersion periods (5-30 min). In contrast to the effects occurring for non-coated glass, where the surface undergoes a rapid selective dissolution of the most soluble species inducing the formation of a new surface phase consisting of stable zirconium oxyfluoride, barium fluoride and lanthanum fluoride species, the results for the SnO2-coated glass showed that the hydrolytic attack induces a filling of the film nanopores by dissolved glass material and the formation of tin oxylluoride and zirconium oxyfluoride species. This process results in a modified film, which acts as a hermetic diffusion barrier protecting efficiently the glass surface. (C) 2006 Elsevier B.V. All rights reserved.en
dc.description.affiliationSão Paulo State Univ, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationRhodia Polimida & Especialidades, BR-13140000 Paulinia, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.format.extent128-134
dc.identifierhttp://dx.doi.org/10.1016/j.elspec.2006.11.013
dc.identifier.citationJournal of Electron Spectroscopy and Related Phenomena. Amsterdam: Elsevier B.V., v. 156, p. 128-134, 2007.
dc.identifier.doi10.1016/j.elspec.2006.11.013
dc.identifier.issn0368-2048
dc.identifier.lattes6466841023506131
dc.identifier.lattes9971202585286967
dc.identifier.lattes5584298681870865
dc.identifier.orcid0000-0002-3823-0050
dc.identifier.orcid0000-0002-8356-8093
dc.identifier.urihttp://hdl.handle.net/11449/38550
dc.identifier.wosWOS:000246726300275
dc.identifier.wosWOS:000246726300081
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Electron Spectroscopy and Related Phenomena
dc.relation.ispartofjcr1.601
dc.relation.ispartofsjr0,738
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectX-ray photoelectron spectroscopypt
dc.subjectZBLAN glassespt
dc.subjecttin-oxide filmpt
dc.subjectchemical composition and structurept
dc.subjectwater corrosionpt
dc.titleXPS study on water corrosion of fluorzirconate glasses and their protection by a layer of surface modified tin dioxide nanoparticlesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes6466841023506131(1)
unesp.author.lattes9971202585286967
unesp.author.lattes5584298681870865[4]
unesp.author.orcid0000-0002-3823-0050(1)
unesp.author.orcid0000-0002-8356-8093[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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