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beta-ZnMoO4 microcrystals synthesized by the surfactant-assisted hydrothermal method: Growth process and photoluminescence properties

dc.contributor.authorCavalcante, L. S. [UNESP]
dc.contributor.authorSczancoski, J. C. [UNESP]
dc.contributor.authorSiu Li, M.
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorVarela, José Arana [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:29:59Z
dc.date.available2014-05-20T15:29:59Z
dc.date.issued2012-02-20
dc.description.abstractIn this communication, we investigate the effect of different surfactants: cetyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS) and polyvinylpyrrolidone (PVP-K40) on the growth process of zinc molybdate (beta-ZnMoO4) microcrystals synthesized under hydrothermal conditions at 140 degrees C for 8 h. These microcrystals were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and photoluminescence (PL) measurements. XRD patterns proved that these crystals are monophasic and present a wolframite-type monoclinic structure. FE-SEM images revealed that the surfactants modified the crystal shapes, suggesting the occurrence of distinct crystal growth processes. The CTAB cationic surfactant promotes the hindrance of small nuclei that leads to the formation of rectangle-like crystals, SDS anionic surfactant induces a growth of irregular hexagons with several porous due to considerable size effect of counter-ions on the crystal facets, PVP-K40 non-ionic surfactant allows a reduction in size and thickness of plate-like crystals, while without surfactants have the formation of irregular plate-like crystals. Finally, the PL properties of beta-ZnMoO4 microcrystals were explained by means of different shape/size, surface defects and order-disorder into lattice. (C) 2011 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, INCTMN, BR-14801907 Araraquara, SP, Brazil
dc.description.affiliationUniv São Paulo, IFSC, BR-13560970 São Carlos, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, INCTMN, BR-14801907 Araraquara, SP, 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.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 09/50303-4
dc.format.extent346-351
dc.identifierhttp://dx.doi.org/10.1016/j.colsurfa.2011.12.021
dc.identifier.citationColloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 396, p. 346-351, 2012.
dc.identifier.doi10.1016/j.colsurfa.2011.12.021
dc.identifier.issn0927-7757
dc.identifier.urihttp://hdl.handle.net/11449/39449
dc.identifier.wosWOS:000301807600050
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofColloids and Surfaces A: Physicochemical and Engineering Aspects
dc.relation.ispartofjcr2.829
dc.relation.ispartofsjr0,753
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.subjectbeta-ZnMoO4en
dc.subjectCrystal growthen
dc.subjectSurfactantsen
dc.subjectPhotoluminescenceen
dc.titlebeta-ZnMoO4 microcrystals synthesized by the surfactant-assisted hydrothermal method: Growth process and photoluminescence propertiesen
dc.typeArtigopt
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentBioquímica e Tecnologia - IQARpt
unesp.departmentFísico-Química - IQARpt

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