Nanostructured KxNa1-xNbO3 hollow spheres as potential materials for the photocatalytic treatment of polluted water

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorBarrio Universitario s/n-
Autor(es): dc.contributorUniversidad Autónoma de Chile-
Autor(es): dc.creatorPraxedes, Fabiano R. [UNESP]-
Autor(es): dc.creatorNobre, Marcos A.L. [UNESP]-
Autor(es): dc.creatorPoon, Po S.-
Autor(es): dc.creatorMatos, Juan-
Autor(es): dc.creatorLanfredi, Silvania [UNESP]-
Data de aceite: dc.date.accessioned2022-08-04T22:10:35Z-
Data de disponibilização: dc.date.available2022-08-04T22:10:35Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2021-12-04-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.apcatb.2021.120502-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/222023-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/222023-
Descrição: dc.descriptionPotassium-sodium niobate-based hollows spheres were studied in the photocatalytic degradation of Basic Blue 41 dye in aqueous phase under UV irradiation. KxNa1-xNbO3 materials were prepared at 700 °C by the spray pyrolysis method. Photocatalysts were characterized by XRD, SEM, TEM, N2 adsorption/desorption isotherms and FTIR. Different kinetic models of adsorption, direct photolysis, and photocatalytic degradation of the azo-dye were performed as a function of the pH of solution. The increase in potassium content is responsible of the distortion and polarization of the niobate structure promoting a decrease in the energy band-gap down to 3.01 eV for K0.5Na0.5NbO3. The photocatalytic activity observed on K0.5Na0.5NbO3 was up to 23 times higher than that on TiO2 in terms of the surface concentration of the azo-dye molecules adsorbed. A mechanism for the degradation of Basic Blue 41 azo-dye based on the reactive oxygen species detected by scavenger's tests and mass-spectroscopy analysis was proposed.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionSão Paulo State University (Unesp) School of Technology and Sciences-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences-
Descrição: dc.descriptionUnidad de Desarrollo Tecnológico (UDT) Universidad de Concepción Barrio Universitario s/n-
Descrição: dc.descriptionInstituto de Ciencias Químicas Aplicadas Facultad de Ingeniería Universidad Autónoma de Chile-
Descrição: dc.descriptionSão Paulo State University (Unesp) School of Technology and Sciences-
Descrição: dc.descriptionSão Paulo State University (Unesp) Institute of Biosciences Humanities and Exact Sciences-
Descrição: dc.descriptionCAPES: 001-
Idioma: dc.languageen-
Relação: dc.relationApplied Catalysis B: Environmental-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBasic blue 41-
Palavras-chave: dc.subjectHollow spheres-
Palavras-chave: dc.subjectKxNa1-xNbO3 photocatalysts-
Palavras-chave: dc.subjectUltrasonic spray pyrolysis-
Título: dc.titleNanostructured KxNa1-xNbO3 hollow spheres as potential materials for the photocatalytic treatment of polluted water-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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