Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4
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Altres documents de l'autoria: 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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Títol
Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4Autoria
Data de publicació
2020-07-23Editor
ElsevierISSN
0025-5408Cita bibliogràfica
PENHA, M. D., et al. Structure, optical properties, and photocatalytic activity of α-Ag2W0. 75Mo0. 25O4. Materials Research Bulletin, 2020, vol. 132, p. 111011.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.sciencedirect.com/science/article/pii/S0025540820314926Versió
info:eu-repo/semantics/acceptedVersionParaules clau / Matèries
Resum
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 [-]
Publicat a
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)Drets d'accés
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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