Formation mechanism and luminescence properties of nanostructured sodium yttrium fluoride corn sticks synthesized by precipitation transformation method

Monodisperse sodium yttrium fluoride com 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...

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Published inJournal of rare earths Vol. 33; no. 12; pp. 1246 - 1250
Main Author 田俐 赵瑞妮 王金晶 陈玮 薛建荣 肖秋国
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2015
Subjects
nanomaterials
photoluminescence
precipitation transformation
rare earths
X射线衍射仪
制备
发光特性
形成机理
氟化钠
沉淀转化法
纳米级
纳米结构
nanomaterials
photoluminescence
precipitation transformation
rare earths
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ISSN1002-0721
2509-4963
DOI10.1016/S1002-0721(14)60552-4

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Summary:Monodisperse sodium yttrium fluoride com 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）3 gradually translated into YF3 and then transformed into com 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 （2Hll/2, 4S3/2）---4It5/2 transition and the weaker red emission between 640 and 680 nm was originating from the 4F9/2---4115/2 transition.
Bibliography:11-2788/TF
Monodisperse sodium yttrium fluoride com 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）3 gradually translated into YF3 and then transformed into com 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 （2Hll/2, 4S3/2）----4It5/2 transition and the weaker red emission between 640 and 680 nm was originating from the 4F9/2----4115/2 transition.
precipitation transformation; nanomaterials; photolum[nescence; rare earths
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60552-4