2024-03-29T13:45:05Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1606702023-05-16T08:44:05Zcom_10234_7013com_10234_9col_10234_8638
00925njm 22002777a 4500
dc
Deus, R.C.
author
Cortés, J.A.
author
Ramirez, M.A.
author
Ponce, Miguel Adolfo
author
Andres, Juan
author
Rocha, L.S.R.
author
Longo, Elson
author
Simões, Alexandre
author
2015
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.
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.
0025-5408
http://hdl.handle.net/10234/160670
http://dx.doi.org/10.1016/j.materresbull.2015.05.006
ceramics
nanostructures
crystal growth
X-ray diffraction
luminescence
Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content