Abstract
Gd2O3:Eu3+ nanobelts were fabricated by calcination of the electrospun PVP/[Gd(NO3)3 + Eu(NO3)3] composite nanobelts. For the first time, Gd2O2S:Eu3+ nanobelts were successfully prepared via inheriting the morphology and sulfurization of the as-prepared Gd2O3:Eu3+ nanobelts precursor using sulfur powders as sulfur source by a double-crucible method we newly proposed. X-ray diffraction analysis indicated that Gd2O2S:Eu3+ nanobelts were pure hexagonal in structure with space group P\( \bar{3} \) m1. Scanning electron microscope analysis results showed that the width and thickness of the Gd2O2S:Eu3+ nanobelts were ca. 2.1 μm and 129 nm, respectively. Under the excitation of 330-nm ultraviolet light, Gd2O2S:Eu3+ nanobelts emitted red emissions of predominant peaks at 628 and 618 nm which were attributed to the 5D0 → 7F2 energy levels transitions of the Eu3+ ions. It was found that the optimum doping molar concentration of Eu3+ ions in Gd2O2S:Eu3+ nanobelts was 5 %. Possible formation and sulfurization mechanisms of Gd2O2S:Eu3+ nanobelts were also proposed. This new sulfurization technique is of great importance, not only can inherit the morphology of rare earth oxides, but also can fabricate pure-phase rare earth oxysulfides at low temperature compared with conventional sulfurization method.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (NSFC 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), the Science and Technology Research Project of the Education Department of Jilin Province during the eleventh five-year plan period (Under Grant No. 2010JYT01).
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Lu, X., Yang, L., Ma, Q. et al. A novel strategy to synthesize Gd2O2S:Eu3+ luminescent nanobelts via inheriting the morphology of precursor. J Mater Sci: Mater Electron 25, 5388–5394 (2014). https://doi.org/10.1007/s10854-014-2317-0
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DOI: https://doi.org/10.1007/s10854-014-2317-0