Influence of the structural properties and W/Nb ratio upon the photocatalytic activity of tungsten-doped potassium sodium niobate-based perovskites

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorConcepción-
Autor(es): dc.contributorUniversidad Autónoma de Chile-
Autor(es): dc.creatorPraxedes, Fabiano R.-
Autor(es): dc.creatorNobre, Marcos A.L.-
Autor(es): dc.creatorLanfredi, Silvania-
Autor(es): dc.creatorPoon, Po S.-
Autor(es): dc.creatorMatos, Juan-
Data de aceite: dc.date.accessioned2025-08-21T17:18:06Z-
Data de disponibilização: dc.date.available2025-08-21T17:18:06Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.materresbull.2024.113256-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/299327-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/299327-
Descrição: dc.descriptionA key challenge in photocatalytic pollutant degradation lies in enhancing the efficiency of perovskite-based catalysts prepared under mild experimental conditions. The incorporation of tungsten (W) into nanostructured hollow particles of alkali niobates was studied as a strategy to improve photocatalytic activity. X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), N2 adsorption/desorption isotherms, Raman and UV–Vis spectroscopies confirmed the successful formation of W-doped K0.5Na0.5NbO3 hollow spherical particles with a monoclinic perovskite structure. Detailed analysis by Rietveld refinement revealed improved octahedral distortion induced by W doping. The photocatalytic activity was evaluated using the molecular density of adsorbed azo dye and the first-order apparent rate-constant, revealing that W-doped samples demonstrated significantly higher activity (3.31×10–2 molecules·nm–2·min–1) compared to the host structure (1.05×10–2 molecules·nm–2·min–1). Based on scavenger tests and mass spectroscopy analysis, a mechanism for the photocatalytic oxidation of the azo dye is proposed.-
Descrição: dc.descriptionDepartment of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences São José do Rio Preto SP-
Descrição: dc.descriptionDepartment of Physics São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP-
Descrição: dc.descriptionUnidad de Desarrollo Tecnológico (UDT) Universidad of Concepción Barrio Universitario s/n Concepción-
Descrição: dc.descriptionUnidad de Cambio Climático y Medio Ambiente (UCCMA) Instituto Iberoamericano de Desarrollo Sostenible (IIDS) Facultad de Arquitectura Construcción y Medio Ambiente Universidad Autónoma de Chile-
Descrição: dc.descriptionDepartment of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences São José do Rio Preto SP-
Descrição: dc.descriptionDepartment of Physics São Paulo State University (Unesp) School of Technology and Sciences, R. Roberto Simonsen – 305, CEP-
Idioma: dc.languageen-
Relação: dc.relationMaterials Research Bulletin-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAlkali niobate-
Palavras-chave: dc.subjectBasic Blue 41 azo-dye-
Palavras-chave: dc.subjectPerovskite-
Palavras-chave: dc.subjectPhotocatalysis-
Palavras-chave: dc.subjectTungsten-
Título: dc.titleInfluence of the structural properties and W/Nb ratio upon the photocatalytic activity of tungsten-doped potassium sodium niobate-based perovskites-
Tipo de arquivo: dc.typelivro digital-
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