Investigation of the systems silica and silica containing chromium in alcohol medium

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dc.contributor.authorGodoi, RHM
dc.contributor.authorFernandes, L.
dc.contributor.authorJafelicci, M.
dc.contributor.authorMarques, R. C.
dc.contributor.authorVaranda, L. C.
dc.contributor.authorDavolos, Marian Rosaly [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:23:00Z
dc.date.available2014-05-20T15:23:00Z
dc.date.issued1999-05-01
dc.description.abstractThe purpose of this work is to obtain micrometer sized spherical particles of silica and silica-chromium from sodium silicate. Spherical particles were prepared by sol-gel method from hydrolysis to polycondensation of aqueous sodium silicate in alcohol medium. Chromium was added to the system for some samples. Compositions and morphologies were achieved by changing the precipitation agent. X-ray diffractometry, electrophoretic mobility, infrared spectroscopy and scanning electron microscopies were carried out on these particles to identify phases, determine particle mobility, morphology, particle sizes, shapes and order at short distance. Non-crystalline silica particles with spherical shapes and micrometric size were obtained. The surface potentials of the silica particles differed from that of the silica-chromium particles. (C) 1999 Elsevier B.V. B.V. All rights reserved.en
dc.description.affiliationUNESP, São Paulo State Univ, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, São Paulo State Univ, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.format.extent141-145
dc.identifierhttp://dx.doi.org/10.1016/S0022-3093(99)00052-6
dc.identifier.citationJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 247, p. 141-145, 1999.
dc.identifier.doi10.1016/S0022-3093(99)00052-6
dc.identifier.issn0022-3093
dc.identifier.lattes4284809342546287
dc.identifier.urihttp://hdl.handle.net/11449/33875
dc.identifier.wosWOS:000080506900026
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Non-Crystalline Solids
dc.relation.ispartofjcr2.488
dc.relation.ispartofsjr0,722
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleInvestigation of the systems silica and silica containing chromium in alcohol mediumen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes4284809342546287
unesp.author.orcid0000-0001-8326-1465[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Química Inorgânica - IQ