期刊
JOURNAL OF LUMINESCENCE
卷 151, 期 -, 页码 18-21出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2014.01.076
关键词
CaF2 nanoparticles; Poly(N-vinyl-2-pyrrolidone); Luminescence; Lanthanide ions
类别
资金
- Industrial Research Project of Science and Technology Department of Shaanxi Province [2013K09-25]
- Fund of Education Committee of Shaanxi Province [12JK0976]
- Xi'an Science and Technology Plan Project [CX12189WL16]
A facile route has been established for the synthesis of PVP/CaF2: RE3+ and PVP/CaF2: Ce3+ nanoparticles (RE=Eu, Tb, Ce/Tb; PVP=Poly(N-vinyl-2-pyrrolidone)) heated at 70 degrees C in ethanol at ambient pressure. The as-prepared nanoparticles were shown to be well dispersed in water. The nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The investigation of fluorescence properties showed that there exists energy transfer from the surface coating of PVP to Eu3+ and Tb3+ leading to the sensitized fluorescence emission of Eu3+ and Tb3+. Co-doping the PVP/CaF2: Tb3+ nanoparticles with Ce3+ results in significant increase in the emission intensity of Tb3+ and this has been attributed to the sensitization of Ce3+ and PVP on Tb3+. (C) 2014 Elsevier B.V. All rights reserved.
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