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 Dariane da Silva
dc.contributor.authorMesquita, Alexandre
dc.contributor.authorFeitosa, Carlos Alberto Carneiro
dc.contributor.authorBalzer, Rosana
dc.contributor.authorProbst, Luiz Fernando Dias
dc.contributor.authorBatalha, Daniel Carreira
dc.contributor.authorRosmaninho, Marcelo Gonçalves
dc.contributor.authorFajardo, Humberto Vieira
dc.contributor.authorBernardi, Maria Inês Basso
dc.date.accessioned2018-03-13T15:37:34Z
dc.date.available2018-03-13T15:37:34Z
dc.date.issued2017
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.pt_BR
dc.identifier.citationALENCAR, L.D. da S. et al. Preparation, characterization and catalytic application of Barium molybdate (BaMoO4) and Barium tungstate (BaWO4) in the gas-phase oxidation of toluene. Ceramics International, v. 43, n. 5, p. 4462-4469, abr. 2017. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0272884216323641>. Acesso em: 15 set. 2017.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.ceramint.2016.12.096
dc.identifier.issn 0272-8842
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/9612
dc.language.isoen_USpt_BR
dc.rightsabertopt_BR
dc.rights.licenseO periódico Ceramics International concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 4210801039274.pt_BR
dc.subjectMicrowave-assisted hydrothermalpt_BR
dc.subjectPolymeric precursorpt_BR
dc.titlePreparation, characterization and catalytic application of Barium molybdate (BaMoO4) and Barium tungstate (BaWO4) in the gas-phase oxidation of toluene.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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