Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4
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Otros documentos de la autoría: Penha, M.D.; Gouveia, Amanda; Teixeira, Mayara Mondego; De Oliveira, R. C.; Assis, Marcelo de; Sambrano, J. R.; Yokaichya, F.; Santos, C. C.; Gonçalves, R. F.; Siu Li, Maximo; San-Miguel, Miguel A.; Andres, Juan; Longo, Elson
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INVESTIGACIONMetadatos
Título
Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4Autoría
Fecha de publicación
2020-07-23Editor
ElsevierISSN
0025-5408Cita bibliográfica
PENHA, M. D., et al. Structure, optical properties, and photocatalytic activity of α-Ag2W0. 75Mo0. 25O4. Materials Research Bulletin, 2020, vol. 132, p. 111011.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S0025540820314926Versión
info:eu-repo/semantics/acceptedVersionPalabras clave / Materias
Resumen
This article describes the synthesis of α-Ag2W0.75Mo0.25O4 using a coprecipitation method followed by microwave irradiation for different times. The samples were characterized using X-ray and neutron diffractions with ... [+]
This article describes the synthesis of α-Ag2W0.75Mo0.25O4 using a coprecipitation method followed by microwave irradiation for different times. The samples were characterized using X-ray and neutron diffractions with Rietveld refinement, Raman spectroscopy, X-ray fluorescence, and ultraviolet-visible diffused reflectance spectroscopy, as well as by photoluminescence emissions. To complement and rationalize the experimental results, first-principles calculations were performed. The formation and growth of metallic Ag nanoparticles on the surfaces of α-Ag2W0.75Mo0.25O4 were studied by transmission electron microscopy and energy dispersive X-ray spectroscopy. Results show that α-Ag2W0.75Mo0.25O4 samples obtained correspond to α-Ag2WO4/β-Ag2MoO4 heterostructure, and the posterior microwave irradiation favors the process of substituting W by Mo, with subsequent formation of a solid solution. Photocatalytic tests were performed to verify the photocatalytic efficiency against the Rhodamine B. Photoluminescence emissions and photocatalytic results showed that the samples obtained at the longest microwave irradiation time promoted the formation of structural defects and enhanced the material properties [-]
Publicado en
Materials Research Bulletin Volume 132, 2020.Proyecto de investigación
FAPEMA, CAPES (PNPD–1268069; Finance Code 001), FAPESP(2013/07296-2; 2016/23891-6; 2019/01732-1; 2019/08928-9), andCNPq (304531/2013-8). J.A. acknowledges Ministerio de Ciencia,Innovación y Universidades (Project No. PGC2018-094417-B-I00), andUniversitat Jaume I (Project UJI-B2019-30)Derechos de acceso
0025-5408/ © 2020 Elsevier Ltd. All rights reserved.T
Licencia CC-BY-NC-ND
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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