Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
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Otros documentos de la autoría: Deus, R.C.; Cortés, J.A.; Ramirez, M.A.; Ponce, Miguel Adolfo; Andres, Juan; Rocha, L.S.R.; Longo, Elson; Simões, Alexandre
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http://dx.doi.org/10.1016/j.materresbull.2015.05.006 |
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Título
Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum contentAutoría
Fecha de publicación
2015Editor
ElsevierISSN
0025-5408Cita bibliográfica
DEUS, R. C., et al. Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content. Materials Research Bulletin, 2015, vol. 70, p. 416-423.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S002554081500330XVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
The structural and photoluminescent properties at room temperature of CeO2 and La-doped CeO2 particles were undertaken. The obtained particles were synthesized by a microwave-assisted hydrothermal method (MAH) under ... [+]
The structural and photoluminescent properties at room temperature of CeO2 and La-doped CeO2 particles were undertaken. The obtained particles were synthesized by a microwave-assisted hydrothermal method (MAH) under different lanthanum contents. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Fourier transform Raman (FT-Raman), Ultra-violet spectroscopy (UV–vis) and photoluminescence (PL) measurements were carried out. XRD revealed that the powders are free of secondary phases and crystallize in the cubic structure. Raman data show that increasing La doping content increase oxygen vacancies due to lattice expansion. The UV/vis absorption spectroscopy suggested the presence of intermediate energy levels in the band gap of structurally ordered powders. Lanthanum addition creates oxygen vacancies and shifts the photoluminescence in the low energy range leading to intense PL emission. [-]
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Materials Research Bulletin, 2015, vol. 70Derechos de acceso
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