Oxide surface modification: Synthesis and characterization of zirconia-coated alumina

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDalmaschio, Cleocir José
dc.creatorMastelaro, Valmor Roberto
dc.creatorNascente, Pedro Augusto de Paula
dc.creatorBettini, Jeferson
dc.creatorZotin, José Luiz
dc.creatorSilva, Elson Longo da
dc.creatorLeite, Edson Roberto
dc.date2015-05-15T13:30:15Z
dc.date2016-10-25T20:48:30Z
dc.date2015-05-15T13:30:15Z
dc.date2016-10-25T20:48:30Z
dc.date2010
dc.date.accessioned2017-04-06T08:16:23Z
dc.date.available2017-04-06T08:16:23Z
dc.identifierJournal of Colloid and Interface Science, v. 343, n. 1, p. 256-262, 2010.
dc.identifier0021-9797
dc.identifierhttp://hdl.handle.net/11449/123468
dc.identifierhttp://acervodigital.unesp.br/handle/11449/123468
dc.identifierhttp://dx.doi.org/10.1016/j.jcis.2009.11.027
dc.identifier9848311210578810
dc.identifier5209978120430790
dc.identifier4361220072322558
dc.identifier1387043320265189
dc.identifier3814895410100282
dc.identifier9491111903657879
dc.identifier1025598529469393
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0021979709014726
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/934081
dc.descriptionFour aluminas were used as supports for impregnation with a zirconium oxide with the aim to achieve a coating, without phase separation, between support and modifier. The supports were impregnated with different concentrations of zirconium aqueous resin, obtained through the polymeric precursor method. After impregnation the samples were calcined and then characterized by XRD, which led to identification of crystalline zirconia in different concentrations from each support used. Using a simple geometric model the maximum amount of surface modifier oxide required for the complete coating of a support with a layer of unit cells was estimated. According to this estimate, only the support should be identified below the limit proposed and crystalline zirconium oxide should be identified above this limit when a complete coating is reached. The results obtained from XRD agree with the estimated values and to con- firm the coating, the samples were also characterized by EDS/STEM, HRTEM, XPS, and XAS. The results showed that the zirconium oxide on the surface of alumina support reached the coating in the limit of 15 Zr nm2 , without the formation of the ZrO2 phase.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.relationJournal of Colloid and Interface Science
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectsurface
dc.subjectcoating
dc.subjectdispersion
dc.subjectCatalysts
dc.subjectceramics
dc.titleOxide surface modification: Synthesis and characterization of zirconia-coated alumina
dc.typeOtro


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