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Pure andEu~ 3+-doped LaF_3 nanoparticle were prepared by a hydrothermal process at a low temperature and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and fluorescence spectra. Well-dispersed nanoparticle with an average size of 30 nm and a hexagonal shape were synthesized. The effects of temperature and reaction time on the preparation of nanoparticle were investigated, and the growth mechanism of nanoparticle was briefly discussed. The effects of Eu~ 3+-doped concentration, the calcination time and temperature were also investigated. An optimal Eu~ 3+-doped concentration of 5% is found. Calcination of the nanoparticle at high temperature and prolonged time greatly reduce the fluorescence intensity. The sample calcinated at 600 ℃ for 6 h emits the strongest fluorescence.
Pure and Eu ~ 3 + -doped LaF_3 nanoparticle were prepared by a hydrothermal process at a low temperature and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and fluorescence spectra. Well-dispersed nanoparticle with an average size of 30 nm and a hexagonal shape were synthesized. The effects of temperature and reaction time on the preparation of nanoparticle were investigated, and the growth mechanism of nanoparticle was briefly discussed. The effects of Eu ~ 3 + -doped concentration, the calcination time and temperature were also investigated. An optimal Eu ~ 3 + -doped concentration of 5% is found. Calcination of the nanoparticle at high temperature and prolonged time greatly reduce the fluorescence intensity. The sample calcinated at 600 ° C for 6 h emits the strongest fluorescence.