Formation mechanism and luminescence properties of nanostructured sodium yttrium fluoride corn sticks synthesized by precipitation transformation method
来源期刊：Journal of Rare Earths2015年第12期
论文作者：田俐 赵瑞妮 王金晶 陈琳 薛建荣 肖秋国
文章页码：1246 - 1250
摘 要：Monodisperse sodium yttrium fluoride corn sticks with hexagonal nanostructure were successfully prepared by a facile and repeatable precipitation transformation method.The phase and morphology of the products were characterized with X-ray diffraction（XRD） and scanning electron microscopy（SEM）.The growth mechanism was studied,indicating that the initial generated Y（OH）3gradually translated into YF3 and then transformed into corn stick-like H-NaYF4 nanoparticles owing to the crucial role of fluorine ions in the solution.The up-conversion（UC） luminescence properties of H-NaYF4:20%Yb3+,2%Er3+ nanocrystals were discussed.The intensive green emission in the range of 510-570 nm was attributed to the(2H11/2,4S3/2)→4I15/2 transition and the weaker red emission between 640 and 680 nm was originating from the 4F9/2→4I15/2 transition.
田俐1,2，赵瑞妮1，王金晶1，陈琳1，薛建荣1，肖秋国1
1. Institute of Chemistry and Chemical Engineering, Hunan University of Science and Technology2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
摘 要：Monodisperse sodium yttrium fluoride corn sticks with hexagonal nanostructure were successfully prepared by a facile and repeatable precipitation transformation method.The phase and morphology of the products were characterized with X-ray diffraction（XRD） and scanning electron microscopy（SEM）.The growth mechanism was studied,indicating that the initial generated Y（OH）3gradually translated into YF3 and then transformed into corn stick-like H-NaYF4 nanoparticles owing to the crucial role of fluorine ions in the solution.The up-conversion（UC） luminescence properties of H-NaYF4:20%Yb3+,2%Er3+ nanocrystals were discussed.The intensive green emission in the range of 510-570 nm was attributed to the(2H11/2,4S3/2)→4I15/2 transition and the weaker red emission between 640 and 680 nm was originating from the 4F9/2→4I15/2 transition.
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