Abstract
YF3:Tb3+ hollow nanofibers were successfully fabricated via fluorination of the relevant Y2O3:Tb3+ hollow nanofibers which were obtained by calcining the electrospun PVP/[Y(NO3)3 + Tb(NO3)3] composite nanofibers. The morphology and properties of the products were investigated in detail by X-ray diffraction, scanning electron microscope, transmission electron microscope, and fluorescence spectrometer. YF3:Tb3+ hollow nanofibers were pure orthorhombic phase with space group Pnma and were hollow-centered structure with the mean diameter of 148 ± 23 nm. Fluorescence emission peaks of Tb3+ in the YF3:Tb3+ hollow nanofibers were observed and assigned to the energy levels transitions of 5D4 → 7FJ (J = 6, 5, 4, 3) (490, 543, 588, and 620 nm) of Tb3+ ions, and the 5D4 → 7F5 hypersensitive transition at 543 nm was the dominant emission peak. Moreover, the emitting colors of YF3:Tb3+ hollow nanofibers were located in the green region in CIE chromaticity coordinates diagram. The luminescent intensity of YF3:Tb3+ hollow nanofibers was increased remarkably with the increasing doping concentration of Tb3+ ions and reached a maximum at 7 mol% of Tb3+. The possible formation mechanism of YF3:Tb3+ hollow nanofibers was also discussed. This preparation technique could be applied to prepare other rare earth fluoride hollow nanofibers.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (NSFC 50972020, 51072026), Ph.D. Programs Foundation of the Ministry of Education of China (20102216110002, 20112216120003), the Science and Technology Development Planning Project of Jilin Province (Grant Nos. 20070402, 20060504), Key Research Project of Science and Technology of Ministry of Education of China (Grant No. 207026).
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Li, D., Dong, X., Yu, W. et al. Fabrication and luminescence of YF3:Tb3+ hollow nanofibers. J Mater Sci: Mater Electron 24, 3041–3048 (2013). https://doi.org/10.1007/s10854-013-1209-z
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DOI: https://doi.org/10.1007/s10854-013-1209-z