The complex fluoride BaLiF3 and BaLiF3∶Ce3+ nanocrystals were synthesized in cetyltrimethylammonium bromide（CTAB）/2-octanol/water microemulsion systems.XRD analysis shows that the products were single phase and XPS...The complex fluoride BaLiF3 and BaLiF3∶Ce3+ nanocrystals were synthesized in cetyltrimethylammonium bromide（CTAB）/2-octanol/water microemulsion systems.XRD analysis shows that the products were single phase and XPS analysis shows the oxygen content was low.The result of ESEM confirms that the average size of the BaLiF3 nanocrystals was 28 nm in diameter.The emission peak of the BaLiF3∶Ce3+ nano-particles synthesized by microemulsion shows obvious blue shift in comparison with that of BaLiF3∶Ce3+ synthesized by the reaction at a high temperature and full width at half maximum（FWHM） of emission band was broaden.展开更多
Nanoparticles of BaLiF3：Er^3＋ were prepared from the quaternary microemulsions of Cetyltrim-Enthyl Ammonium Bromide （CTAB）, n-butanol, n-octane, and water, using the hydrothermal-microemulsion technique. The compl...Nanoparticles of BaLiF3：Er^3＋ were prepared from the quaternary microemulsions of Cetyltrim-Enthyl Ammonium Bromide （CTAB）, n-butanol, n-octane, and water, using the hydrothermal-microemulsion technique. The complex fluorides were characterized by means of X-ray power diffraction, Environmental Scanning Electron Microscopy （ESEM）, and fluorescence spectra. The positions and intensifies of the peaks in the XRD pattern of the final products indicate the formation of BaLiF3·Er^3＋. No other peaks or impurities were detected. The average size of the nanoparticles, calculated with the Debye-Scherrer equation was 98.45 nm, which was in agreement with the result of ESEM. The infrared fluorescence spectra consisted of four peaks with a predominant peak located at 1540 nm.展开更多
Phosphors of BaLiF3 doped with Eu or/and Ce were solvothermally prepared at 200℃ for 5 d and characterized by means of X-ray powder diffraction （XRD） and environment scanning electron microscopy （ESEM）. The excit...Phosphors of BaLiF3 doped with Eu or/and Ce were solvothermally prepared at 200℃ for 5 d and characterized by means of X-ray powder diffraction （XRD） and environment scanning electron microscopy （ESEM）. The excitation and emission spectra of the rare earth ions doped BaLiF3 were measured by fluorescence spectroscopy and the effects of Ce3＋ ions on the luminescence of Eu〉 ions were in- vestigated. In the co-doped Eu2＋ and Ce3＋ system, the emission intensity of Eu2＋ ion gradually increased with the Ce3＋ concentration increas- ing, and the enhancement of Eu2＋ fluorescence was due to efficient energy transfer from Ce3＋ to Eu2＋ in the host.展开更多
文摘The complex fluoride BaLiF3 and BaLiF3∶Ce3+ nanocrystals were synthesized in cetyltrimethylammonium bromide（CTAB）/2-octanol/water microemulsion systems.XRD analysis shows that the products were single phase and XPS analysis shows the oxygen content was low.The result of ESEM confirms that the average size of the BaLiF3 nanocrystals was 28 nm in diameter.The emission peak of the BaLiF3∶Ce3+ nano-particles synthesized by microemulsion shows obvious blue shift in comparison with that of BaLiF3∶Ce3+ synthesized by the reaction at a high temperature and full width at half maximum（FWHM） of emission band was broaden.
基金Project supported by the Foundation of Science and Technology Department of Jilin Province (20050507)
文摘Nanoparticles of BaLiF3：Er^3＋ were prepared from the quaternary microemulsions of Cetyltrim-Enthyl Ammonium Bromide （CTAB）, n-butanol, n-octane, and water, using the hydrothermal-microemulsion technique. The complex fluorides were characterized by means of X-ray power diffraction, Environmental Scanning Electron Microscopy （ESEM）, and fluorescence spectra. The positions and intensifies of the peaks in the XRD pattern of the final products indicate the formation of BaLiF3·Er^3＋. No other peaks or impurities were detected. The average size of the nanoparticles, calculated with the Debye-Scherrer equation was 98.45 nm, which was in agreement with the result of ESEM. The infrared fluorescence spectra consisted of four peaks with a predominant peak located at 1540 nm.
基金Project supported by National Natural Science Foundation of China (U0734005, 20906037)the Fundamental Research Funds for the Central Universities (21610102)the Doctor Special Foundation of Zhanjiang Normal University (ZL1104)
文摘Phosphors of BaLiF3 doped with Eu or/and Ce were solvothermally prepared at 200℃ for 5 d and characterized by means of X-ray powder diffraction （XRD） and environment scanning electron microscopy （ESEM）. The excitation and emission spectra of the rare earth ions doped BaLiF3 were measured by fluorescence spectroscopy and the effects of Ce3＋ ions on the luminescence of Eu〉 ions were in- vestigated. In the co-doped Eu2＋ and Ce3＋ system, the emission intensity of Eu2＋ ion gradually increased with the Ce3＋ concentration increas- ing, and the enhancement of Eu2＋ fluorescence was due to efficient energy transfer from Ce3＋ to Eu2＋ in the host.
