Preparation, characterization and catalytic application of Barium molybdate (BaMoO4) and Barium tungstate (BaWO4) in the gas-phase oxidation of toluene

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dc.contributor.authorAlencar, Lorena.D.S.
dc.contributor.authorMesquita, Alexandre [UNESP]
dc.contributor.authorFeitosa, Carlos A.C.
dc.contributor.authorBalzer, Rosana
dc.contributor.authorProbst, Luiz F.D.
dc.contributor.authorBatalha, Daniel C.
dc.contributor.authorRosmaninho, Marcelo G.
dc.contributor.authorFajardo, Humberto V.
dc.contributor.authorBernardi, Maria I.B.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Maranhão
dc.contributor.institutionUniversidade Federal de Santa Catarina (UFSC)
dc.contributor.institutionUniversidade Federal de Ouro Preto
dc.date.accessioned2018-12-11T17:09:15Z
dc.date.available2018-12-11T17:09:15Z
dc.date.issued2017-04-01
dc.description.abstractBarium molybdate and Barium tungstate are important materials due their photoluminescent properties and they also have catalysis and photocatalysis applications. In this work, powders of these compounds were prepared by microwave-assisted hydrothermal (MAH) method and polymeric precursor method (PPM) and their structural and optical properties were studied. Furthermore, these materials were employed as solid catalysts towards gas phase toluene oxidation reactions. X-ray diffraction confirms the purity of materials at both preparation methods and reveals a preferential growth when the powders are prepared by MAH due polymeric agents and processing using microwave, which was confirmed by Field emission scanning electron microscopy. Photoluminesce emission was attributed to the charge-transfer transitions within the [WO4]2- and [MoO4]2- complexes. The H2 Temperature-Programmed Reduction (H2-TPR), O2-chemisorption and extended X-ray absorption fine structure (EXAFS) results indicated that BaWO4 samples, compared with BaMoO4 samples, have higher oxygen mobility and oxygen vacancies that appear as key factors for the achievement of better catalytic performances.en
dc.description.affiliationInstituto de Física de São Carlos Universidade de São Paulo USP
dc.description.affiliationInstituto de Geociências e Ciências Exatas Unesp - Universidade Estadual Paulista Departamento de Física
dc.description.affiliationDepartamento de Física Centro de Ciências Exatas e Tecnologia Universidade Federal do Maranhão
dc.description.affiliationDepartamento de Química Universidade Federal de Santa Catarina
dc.description.affiliationInstituto de Ciências Exatas e Biológicas Departamento de Química Universidade Federal de Ouro Preto
dc.description.affiliationUnespInstituto de Geociências e Ciências Exatas Unesp - Universidade Estadual Paulista Departamento de Física
dc.format.extent4462-4469
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2016.12.096
dc.identifier.citationCeramics International, v. 43, n. 5, p. 4462-4469, 2017.
dc.identifier.doi10.1016/j.ceramint.2016.12.096
dc.identifier.file2-s2.0-85009453050.pdf
dc.identifier.issn0272-8842
dc.identifier.scopus2-s2.0-85009453050
dc.identifier.urihttp://hdl.handle.net/11449/174084
dc.language.isoeng
dc.relation.ispartofCeramics International
dc.relation.ispartofsjr0,784
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBaMoO4
dc.subjectBaWO4
dc.subjectMicrowave-assisted hydrothermal
dc.subjectPolymeric precursor
dc.titlePreparation, characterization and catalytic application of Barium molybdate (BaMoO4) and Barium tungstate (BaWO4) in the gas-phase oxidation of tolueneen
dc.typeArtigo
unesp.author.lattes2835864951583089[2]
unesp.author.orcid0000-0001-8524-0959[2]

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Artigos - Física - IGCE