Nb-containing hematites Fe2−xNbxO3: the role of Nb5+ on the reactivity in presence of the H2O2 or ultraviolet light

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorSilva, Adilson C.-
Autor(es): dc.creatorOliveira, Diana Q.L.-
Autor(es): dc.creatorOliveira, Luiz C.A.-
Autor(es): dc.creatorAnastácio, Alexandre S.-
Autor(es): dc.creatorRamalho, Teodorico C.-
Autor(es): dc.creatorLopes, João H.-
Autor(es): dc.creatorCarvalho, Hudson W.P.-
Autor(es): dc.creatorTorres, Claudia E. Rodriguez-
Data de aceite: dc.date.accessioned2026-02-09T11:35:03Z-
Data de disponibilização: dc.date.available2026-02-09T11:35:03Z-
Data de envio: dc.date.issued2020-05-18-
Data de envio: dc.date.issued2020-05-18-
Data de envio: dc.date.issued2009-03-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/41009-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/abs/pii/S0926860X09000404-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1142887-
Descrição: dc.descriptionA series of Nb-containing hematites, Fe2−xNbxO3 (%Nb = 0.00, 1.49, 5.00 and 9.24) was prepared using the conventional co-precipitation method. Mössbauer and temperature-programmed reduction (TPR) measurements suggested the formation of the crystalline phase with partial substitution of Fe3+ by Nb5+ in the structure. N2 adsorption/desorption revealed that the presence of Nb has a remarkable effect on the textural properties of the material with an increase in the BET surface area. The reactivity of Fe2−xNbxO3 was investigated using the oxidation of the methylene blue dye used as a model pollutant. The obtained results showed that the presence of Nb seems not to act directly promoting the H2O2 decomposition, but improving the dye oxidation. The analysis using the ESI-MS technique showed partial oxidation observed through different intermediates before the mineralization. This suggests the use of Nb-doped hematite as an efficient catalyst in degradation reactions in the presence of H2O2 or ultraviolet light.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceApplied Catalysis A: General-
Palavras-chave: dc.subjectHematite-
Palavras-chave: dc.subjectNiobium-
Palavras-chave: dc.subjectOrganic oxidation-
Palavras-chave: dc.subjectESI-MS-
Palavras-chave: dc.subjectElectrospray ionization mass spectrometry (ESI-MS)-
Título: dc.titleNb-containing hematites Fe2−xNbxO3: the role of Nb5+ on the reactivity in presence of the H2O2 or ultraviolet light-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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