Vanadium-doped TiO2 anatase nanostructures: the role of V in solid solution formation and its effect on the optical properties

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dc.contributor.authorAvansi, W.
dc.contributor.authorArenal, R.
dc.contributor.authorMendonca, V. R. de
dc.contributor.authorRibeiro, C.
dc.contributor.authorLongo, E. [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniv Zaragoza
dc.contributor.institutionARAID Fdn
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-12-03T13:08:37Z
dc.date.available2014-12-03T13:08:37Z
dc.date.issued2014-01-01
dc.description.abstractA facile and environmentally friendly synthesis approach for the production of vanadium doped titanium dioxide (VxTi1-xO2) nanostructures was demonstrated via hydrothermal decomposition of vanadium and titanium peroxo-complexes. The effect of vanadium addition on the structural and morphological properties of VxTi1-xO2 nanocrystals was investigated by X-ray diffraction (XRD) and electron microscopy techniques. XRD analysis showed that all VxTi1-xO2 samples presented only the TiO2 anatase crystalline phase and, despite the different amounts of vanadium ions, the single crystalline nature was preserved. Increasing V contents resulted in morphological evolution, from anisotropic to isotropic structures. X-ray absorption spectroscopy (XAS) and electron energy loss spectroscopy (EELS) have been employed for investigating the atomic composition and configuration of these nanostructures. XAS measurements at the K-edges (for V and Ti) revealed that V ions occupy the Ti4+-site, which confirms the doping effect. Furthermore, high-angle annular dark-field (HAADF) imaging, combined with EELS mapping, indicated that the vanadium ions were homogeneously distributed in the structure without any kind of segregation. These morphological and compositional modifications upon vanadium addition led to evolution of the TiO2 optical properties.en
dc.description.affiliationUniv Fed Sao Carlos, UFSCar, Dept Fis, BR-13565905 Sao Paulo, Brazil
dc.description.affiliationUniv Zaragoza, LMA, INA, Zaragoza 50018, Spain
dc.description.affiliationARAID Fdn, Zaragoza 50018, Spain
dc.description.affiliationUniv Fed Sao Carlos, Dept Quim, UFSCar, BR-13560 Sao Carlos, SP, Brazil
dc.description.affiliationEmbrapa Instrumentacao, Lab Nacl Nanotecnol Aplicada Ao Agronegocio LNNA, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Quim, Sao Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, Sao Paulo, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipU. de Zaragoza
dc.description.sponsorshipARAID foundation
dc.description.sponsorshipEuropean Union Seventh Framework Program
dc.description.sponsorshipIdU. de Zaragoza165-119
dc.description.sponsorshipIdU. de Zaragoza165-120
dc.description.sponsorshipIdEuropean Union Seventh Framework Program312483 - ESTEEM2 (Integrated Infrastructure Initiative - I3)
dc.format.extent5021-5027
dc.identifierhttp://dx.doi.org/10.1039/c3ce42356e
dc.identifier.citationCrystengcomm. Cambridge: Royal Soc Chemistry, v. 16, n. 23, p. 5021-5027, 2014.
dc.identifier.doi10.1039/c3ce42356e
dc.identifier.issn1466-8033
dc.identifier.urihttp://hdl.handle.net/11449/111402
dc.identifier.wosWOS:000336738400018
dc.language.isoeng
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofCrystEngComm
dc.relation.ispartofjcr3.304
dc.relation.ispartofsjr0,998
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleVanadium-doped TiO2 anatase nanostructures: the role of V in solid solution formation and its effect on the optical propertiesen
dc.typeArtigo
dcterms.rightsHolderRoyal Soc Chemistry
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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