Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4
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Other documents of the author: 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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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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INVESTIGACIONMetadata
Title
Structure, optical properties, and photocatalytic activity of α-Ag2W0.75Mo0.25O4Author (s)
Date
2020-07-23Publisher
ElsevierISSN
0025-5408Bibliographic citation
PENHA, M. D., et al. Structure, optical properties, and photocatalytic activity of α-Ag2W0. 75Mo0. 25O4. Materials Research Bulletin, 2020, vol. 132, p. 111011.Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S0025540820314926Version
info:eu-repo/semantics/acceptedVersionSubject
Abstract
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 [-]
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Materials Research Bulletin Volume 132, 2020.Investigation project
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)Rights
0025-5408/ © 2020 Elsevier Ltd. All rights reserved.T
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