期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 184, 期 1, 页码 141-148出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2010.11.019
关键词
Electrospinning; Vanadate; Lanthanide; Luminescence; Nanofibers
资金
- National Basic Research Program of China [2007CB935502, 2010CB327704]
- National Natural Science Foundation of China [NSFC 50702057, 50872131, 20921002]
One-dimensional GdVO4:Ln(3+) (Ln=Eu, Dy, Sm) nanofibers have been prepared by a combination method of sol-gel process and electrospinning technology. X-ray diffraction (XRD). Fourier transform infrared spectroscopy (FT-IR), thermogravimetric and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL), quantum efficiency (QE), and cathodoluminescence (CL) spectra as well as kinetic decays were used to characterize the samples. The XRD, FT-IR. and TG-DTA results show that GdVO4:Ln(3+) nanofibers samples crystallize at 700 degrees C. SEM images indicate that the as prepared precursor fibers are smooth. After being calcined at 700 degrees C for 4 h, the fibers still maintain their fiberlike morphology with rough surface. TEM image further manifests that the GdVO4:Ln(3+) nanofibers consist of nanoparticles. Under ultraviolet excitation and low-voltage electron beam excitation, GdVO4:Ln(3+) phosphors showed their strong characteristic emission due to an efficient energy transfer from vanadate groups to dopants. The optimum doping concentration of Ln(3+) in the GdVO4 nanofibers also has been investigated. (C) 2010 Elsevier Inc. All rights reserved.
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