QEXAFS and UV/Vis Simultaneous Monitoring of the TiO2-Nanoparticles Formation by Hydrolytic Sol-Gel Route

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dc.contributor.authorStoetzel, Jan
dc.contributor.authorLuetzenkirchen-Hecht, Dirk
dc.contributor.authorFrahm, Ronald
dc.contributor.authorSantilli, Celso Valentim [UNESP]
dc.contributor.authorPulcinelli, Sandra Helena [UNESP]
dc.contributor.authorKaminski, Renata
dc.contributor.authorFonda, Emiliano
dc.contributor.authorVillain, Francoise
dc.contributor.authorBriois, Valerie
dc.contributor.institutionUniv Wuppertal
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionSynchrotron SOLEIL
dc.date.accessioned2014-05-20T14:18:20Z
dc.date.available2014-05-20T14:18:20Z
dc.date.issued2010-04-15
dc.description.abstractThe hydrolysis of titanium(IV) tetraisopropoxide and the following condensation and aggregation to titania nanoparticles under slow water solution addition were concomitantly investigated by in situ QEXAFS and UV/vis spectroscopies The amount of dominant utanate species in the solution was determined as a function of time. Impel attire. and water addition rate Resulting from last hydrolysis and condensation of isopropoxide precursors an intermediate oligomeric species is initially formed at the early stages of the reaction This oligomeric species has been identified as a dodecatitanate species with Ti11O13 or Ti12O16 molecular framework. At the subsequent stage of the reaction corresponding to slower processes compared to the fast hydrolysis, titania nanoparticles are formed by a cluster-cluster growth mechanism involving the consumption of the dodecatitanate species following a pseudo first-order reaction Finally, at the advanced stage, sudden aggregation of mania nanoparticles occurs at a given threshold of amount of nanoparticlesen
dc.description.affiliationUniv Wuppertal, Dept Phys C, D-42097 Wuppertal, Germany
dc.description.affiliationUNESP, Inst Quim, BR-14800900 Araraquara, Brazil
dc.description.affiliationSynchrotron SOLEIL, F-91192 Gif Sur Yvette, France
dc.description.affiliationUnespUNESP, Inst Quim, BR-14800900 Araraquara, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdCAPES: Ph 564/07
dc.format.extent6228-6236
dc.identifierhttp://dx.doi.org/10.1021/jp9105019
dc.identifier.citationJournal of Physical Chemistry C. Washington: Amer Chemical Soc, v. 114, n. 14, p. 6228-6236, 2010.
dc.identifier.doi10.1021/jp9105019
dc.identifier.issn1932-7447
dc.identifier.lattes5584298681870865
dc.identifier.lattes9971202585286967
dc.identifier.orcid0000-0002-8356-8093
dc.identifier.urihttp://hdl.handle.net/11449/25516
dc.identifier.wosWOS:000276341700004
dc.language.isoeng
dc.publisherAmer Chemical Soc
dc.relation.ispartofJournal of Physical Chemistry C
dc.relation.ispartofjcr4.484
dc.relation.ispartofsjr2,135
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleQEXAFS and UV/Vis Simultaneous Monitoring of the TiO2-Nanoparticles Formation by Hydrolytic Sol-Gel Routeen
dc.typeArtigo
dcterms.licensehttp://pubs.acs.org/page/copyright/journals/faqs.html
dcterms.rightsHolderAmer Chemical Soc
unesp.author.lattes9971202585286967
unesp.author.lattes5584298681870865[4]
unesp.author.orcid0000-0002-8356-8093[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Físico Química - IQ