Synthesis, Characterization, Anisotropic Growth and Photoluminescence of BaWO4

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dc.contributor.authorCavalcante, L. S.
dc.contributor.authorSczancoski, J. C.
dc.contributor.authorLima, L. F.
dc.contributor.authorEspinosa, J. W. M. [UNESP]
dc.contributor.authorPizani, P. S.
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:32:38Z
dc.date.available2014-05-20T15:32:38Z
dc.date.issued2009-02-01
dc.description.abstractThis paper reports on the synthesis of barium tungstate (BaWO4) powders obtained by the coprecipitation method and processed in a domestic microwave-hydrothermal (MH) at 413 K for different times. These powders were analyzed by X-ray diffraction (XRD), Fourier transform Raman (FT-Raman) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy and fieldemission gun scanning electron microscopy (FEG-SEM). XRD patterns showed that the BaWO4 powders present a scheelite-type tetragonal structure and free of secondary phases. FT-Raman spectra proved the evidence of a tetragonal structure due to W-O stretching vibration into the [WO4] tetrahedron groups. FT-IR spectra revealed a strong shoulder on the nu(3) bands in the transmittance spectra of the powders. FEG-SEM micrographs indicated that the powders present an octahedron-like morphology with agglomerated nature and polydisperse particle size distribution. The morphological evolution of BaWO4 powders with the processing time in a MH system was investigated and a possible growth mechanism was proposed. A green photoluminescence (PL) emission at room temperature was verified for the BaWO4 powders when exited by 488 nm wavelength. Finally, a model was proposed to explain this physical property.en
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Quim & Fis, BR-13565905 São Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, BR-14801907 Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, BR-14801907 Araraquara, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent1002-1012
dc.identifierhttp://dx.doi.org/10.1021/cg800817x
dc.identifier.citationCrystal Growth & Design. Washington: Amer Chemical Soc, v. 9, n. 2, p. 1002-1012, 2009.
dc.identifier.doi10.1021/cg800817x
dc.identifier.issn1528-7483
dc.identifier.urihttp://hdl.handle.net/11449/41485
dc.identifier.wosWOS:000263048200056
dc.language.isoeng
dc.publisherAmer Chemical Soc
dc.relation.ispartofCrystal Growth & Design
dc.relation.ispartofjcr3.972
dc.relation.ispartofsjr1,154
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleSynthesis, Characterization, Anisotropic Growth and Photoluminescence of BaWO4en
dc.typeArtigo
dcterms.licensehttp://pubs.acs.org/page/copyright/journals/faqs.html
dcterms.rightsHolderAmer Chemical Soc
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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