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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/129603
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dc.contributor.authorGoncalves, R. F.-
dc.contributor.authorCavalcante, L. S.-
dc.contributor.authorNogueira, I. C.-
dc.contributor.authorLongo, Elson-
dc.contributor.authorGodinho, M. J.-
dc.contributor.authorSczancoski, J. C.-
dc.contributor.authorMastelaro, V. R.-
dc.contributor.authorPinatti, I. M.-
dc.contributor.authorRosa, I. L. V.-
dc.contributor.authorMarques, A. P. A.-
dc.date.accessioned2015-10-22T06:14:02Z-
dc.date.accessioned2016-10-25T21:15:54Z-
dc.date.available2015-10-22T06:14:02Z-
dc.date.available2016-10-25T21:15:54Z-
dc.date.issued2015-01-01-
dc.identifierhttp://pubs.rsc.org/en/Content/ArticleLanding/2015/CE/C4CE02279C#!divAbstract-
dc.identifier.citationCrystengcomm. Cambridge: Royal Soc Chemistry, v. 17, n. 7, p. 1654-1666, 2015.-
dc.identifier.issn1466-8033-
dc.identifier.urihttp://hdl.handle.net/11449/129603-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/129603-
dc.description.abstractCaWO4:Eu3+ microcrystals (with 0, 1, 2 and 4 mol% Eu3+) were synthesized by a co-precipitation (CP) method and grown in a microwave-assisted hydrothermal (MAH) system at 130 degrees C for 30 min. X-ray diffraction (XRD), Rietveld refinement, X-ray absorption near edge spectroscopy (XANES), Fourier-transform Raman (FT-Raman) and Fourier-transform infrared (FT-IR) spectroscopy indicated that all of the microcrystals have a scheelite-type tetragonal structure without deleterious phases. Structural refinement data were employed to model the [CaO8], [EuO8] and [WO4] clusters. XANES spectra confirmed that the presence of deltahedral [EuO8] clusters promotes small distortions of neighbouring tetrahedral [WO4] clusters in a global tetragonal lattice. Field emission scanning electron microcopy (FE-SEM) images revealed that the replacement of Ca2+ by Eu3+ ions changed the particles'shapes, resulting in the different morphologies of the microcrystals. UV-vis diffuse reflectance spectra indicated a reduction in the optical band gap with the replacement of Ca2+ by Eu3+ ions. The photoluminescence (PL) properties of the Eu3+ ions in CaWO4 were studied as well as the chromaticity coordinates and lifetimes of these compounds.en
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.sponsorshipNational Laboratory of Synchrotron Light-
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
dc.format.extent1654-1666-
dc.language.isoeng-
dc.publisherRoyal Soc Chemistry-
dc.sourceWeb of Science-
dc.titleRietveld refinement, cluster modelling, growth mechanism and photoluminescence properties of CaWO4: Eu3+ microcrystalsen
dc.typeoutro-
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)-
dc.contributor.institutionInstituto Federal de Educação (IFMA)-
dc.contributor.institutionUniversidade Estadual do Piauí (UEPI)Universidade Federal de Goiás (UFG)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)-
dc.description.affiliationUNIFESP (Universidade Federal de São Paulo), Rua Prof. Artur Riedel, 275, Diadema, Brazil-
dc.description.affiliationDepartamento de Química, UESPI, CCN, Rua João Cabral, P.O. Box 2231, Teresina-PI, Brazil-
dc.description.affiliationIFMA (Instituto Federal de Educação), Ciência e Tecnologia do Maranhão, PPGEM, São Luís, Brazil-
dc.description.affiliationDepartamento de Química, CAC/UFG (Universidade Federal de Goiás), Catalão, Brazil-
dc.description.affiliationIFSC, Universidade de São Paulo, P.O. Box 369, São Carlos, Brazil-
dc.description.affiliationCDMF-DQ, Universidade Federal de São Carlos, P.O. Box 676, 13565-905 São Carlos, Brazil-
dc.description.affiliationUnespUniversidade Estadual Paulista, LIEC IQ, BR-14801907 Araraquara, SP, Brazil-
dc.description.sponsorshipIdFAPESP: 2013/07296-2-
dc.description.sponsorshipIdCNPq: 304531/2013-8-
dc.description.sponsorshipIdNational Laboratory of Synchrotron Light: D04B-XAFS1-11883-
dc.identifier.doihttp://dx.doi.org/10.1039/c4ce02279c-
dc.identifier.wosWOS:000349309700023-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofCrystengcomm-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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