Abstract
PVP/[Ba(CH3COO)2 + Y(NO3)3 + Er(NO3)3] composite nanofibers were prepared via electrospinning, and then mixed oxide nanofibers were obtained by calcining the composite nanofibers in air, and finally Ba4Y3F17:Er3+ nanofibers were successfully synthesized by fluorination of the as-prepared mixed oxide nanofibers used as precursor via a double-crucible method applying NH4HF2 as fluorinating agent. X-ray diffraction (XRD) analysis reveals that Ba4Y3F17:Er3+ nanofibers are pure rhombohedral phase. The diameter of Ba4Y3F17:Er3+ nanofibers is 84.3 ± 4.9 nm under the 95 % confidence level. Upconversion emission spectra analysis manifests that Ba4Y3F17:Er3+ nanofibers emit strong green and weak red upconversion emissions centering at 523 (2H11/2 → 4I15/2), 541 (4S3/2 → 4I15/2) and 652 (4F9/2 → 4I15/2) nm, respectively, and the emitting colors of Ba4Y3F17:Er3+ nanofibers are located in the green region in CIE chromaticity coordinates diagram. The optimum doping molar concentration of Er3+ ions is found to be 9 %. Moreover, the formation mechanism and upconversion luminescence of the Ba4Y3F17:Er3+ nanofibers are also investigated. This novel preparation technique can be applied to prepare other rare earth fluoride one-dimensional nanomaterials.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (NSFC 51573023, 50972020, 51072026), Specialized Research Fund for the Doctoral Program of Higher Education (20102216110002, 20112216120003), the Science and Technology Development Planning Project of Jilin Province (Grant Nos. 20130101001JC, 20070402).
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Liu, Y., Li, D., Ma, Q. et al. Fabrication of novel Ba4Y3F17:Er3+ nanofibers with upconversion fluorescence via combination of electrospinning with fluorination. J Mater Sci: Mater Electron 27, 11666–11673 (2016). https://doi.org/10.1007/s10854-016-5302-y
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DOI: https://doi.org/10.1007/s10854-016-5302-y