Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission

Molybdates are inorganic materials with great potential in white phosphors application, being an alternative to traditional lighting sources. In this study, we report the synthesis and characterization of Mg1-xSrxMoO4 (x 1⁄4 0, 0.25, 0.50, 0.75, and 1) powders with white light-emitting properties. U...

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Principais autores: Paskocimas, Carlos Alberto, Santiago, Anderson de Azevedo Gomes, Tranquilin, Ricardo Luis, Botella, Pablo, Manjon, Francisco Javier, Errandonea, Daniel J.H., Motta, Fabiana Villela da, Delmonte, Maurício Roberto Bomio
Formato: article
Idioma:English
Publicado em: Elsevier
Assuntos:
Ultrasonic spray pyrolysis
Raman spectroscopy
Photoluminescence
Molybdate
White emission
Endereço do item:https://repositorio.ufrn.br/handle/123456789/31987
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spelling ri-123456789-319872024-03-19T04:02:06Z Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission Paskocimas, Carlos Alberto Santiago, Anderson de Azevedo Gomes Tranquilin, Ricardo Luis Botella, Pablo Manjon, Francisco Javier Errandonea, Daniel J.H. Motta, Fabiana Villela da Delmonte, Maurício Roberto Bomio Ultrasonic spray pyrolysis Raman spectroscopy Photoluminescence Molybdate White emission Molybdates are inorganic materials with great potential in white phosphors application, being an alternative to traditional lighting sources. In this study, we report the synthesis and characterization of Mg1-xSrxMoO4 (x 1⁄4 0, 0.25, 0.50, 0.75, and 1) powders with white light-emitting properties. Using X-ray diffraction, the formation of the monoclinic b-MgMoO4 phase was observed for x 1⁄4 0 and the formation of the tetragonal scheelite phase of SrMoO4 was observed for x 1⁄4 1. The formation of a heterostructure composed of both phases was found for compositions with x 1⁄4 0.25, 0.50 and 0.75. Scanning and trasmission electron microscopy images showed that the Mg1-xSrxMoO4 particles exhibit a spherical morphology formed by several primary nanoparticles. Raman scattering spectroscopy enabled the accurate identification of the Raman modes for different compositions and their assignment to either the SrMoO4 or b-MgMoO4 modes. The bandgap energies were determined to fluctuate between 4.25 eV and 4.44 eV, being influenced by the degree of structural disorder. The photoluminescence emission spectra of the nanoparticles showed neutral- and cool-white emission with high-quality white light (CRI > 80%). The samples synthesized with x 0.50 are potential materials for the application in LED lamps (6500 K) and pure white-light sources (5500 K) 2022-02-01 2021-03-24T12:20:14Z 2020-01-15 article SANTIAGO, A.A.G.; TRANQUILIN, R.L.; BOTELLA, P.; MANJÓN, F.J.; ERRANDONEA, D.; PASKOCIMAS, C.A.; MOTTA, F.V.; BOMIO, M.R.D.. Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission. Journal Of Alloys And Compounds, [S.L.], v. 813, p. 152235-152235, jan. 2020. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838819334814?via%3Dihub. Acesso em: 02 dez. 2020. http://dx.doi.org/10.1016/j.jallcom.2019.152235. 0925-8388 https://repositorio.ufrn.br/handle/123456789/31987 10.1016/j.jallcom.2019.152235 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Elsevier
institution Repositório Institucional
collection RI - UFRN
language English
topic Ultrasonic spray pyrolysis
Raman spectroscopy
Photoluminescence
Molybdate
White emission
spellingShingle Ultrasonic spray pyrolysis
Raman spectroscopy
Photoluminescence
Molybdate
White emission
Paskocimas, Carlos Alberto
Santiago, Anderson de Azevedo Gomes
Tranquilin, Ricardo Luis
Botella, Pablo
Manjon, Francisco Javier
Errandonea, Daniel J.H.
Motta, Fabiana Villela da
Delmonte, Maurício Roberto Bomio
Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission
description Molybdates are inorganic materials with great potential in white phosphors application, being an alternative to traditional lighting sources. In this study, we report the synthesis and characterization of Mg1-xSrxMoO4 (x 1⁄4 0, 0.25, 0.50, 0.75, and 1) powders with white light-emitting properties. Using X-ray diffraction, the formation of the monoclinic b-MgMoO4 phase was observed for x 1⁄4 0 and the formation of the tetragonal scheelite phase of SrMoO4 was observed for x 1⁄4 1. The formation of a heterostructure composed of both phases was found for compositions with x 1⁄4 0.25, 0.50 and 0.75. Scanning and trasmission electron microscopy images showed that the Mg1-xSrxMoO4 particles exhibit a spherical morphology formed by several primary nanoparticles. Raman scattering spectroscopy enabled the accurate identification of the Raman modes for different compositions and their assignment to either the SrMoO4 or b-MgMoO4 modes. The bandgap energies were determined to fluctuate between 4.25 eV and 4.44 eV, being influenced by the degree of structural disorder. The photoluminescence emission spectra of the nanoparticles showed neutral- and cool-white emission with high-quality white light (CRI > 80%). The samples synthesized with x 0.50 are potential materials for the application in LED lamps (6500 K) and pure white-light sources (5500 K)
format article
author Paskocimas, Carlos Alberto
Santiago, Anderson de Azevedo Gomes
Tranquilin, Ricardo Luis
Botella, Pablo
Manjon, Francisco Javier
Errandonea, Daniel J.H.
Motta, Fabiana Villela da
Delmonte, Maurício Roberto Bomio
author_facet Paskocimas, Carlos Alberto
Santiago, Anderson de Azevedo Gomes
Tranquilin, Ricardo Luis
Botella, Pablo
Manjon, Francisco Javier
Errandonea, Daniel J.H.
Motta, Fabiana Villela da
Delmonte, Maurício Roberto Bomio
author_sort Paskocimas, Carlos Alberto
title Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission
title_short Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission
title_full Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission
title_fullStr Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission
title_full_unstemmed Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission
title_sort spray pyrolysis synthesis and characterization of mg1-xsrxmoo4 heterostructure with white light emission
publisher Elsevier
publishDate 2021
url https://repositorio.ufrn.br/handle/123456789/31987
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