CaF2 and CaF2:Ln3+ (Ln = Er, Nd, Yb) hierarchical nanoflowers: hydrothermal synthesis and luminescent properties
CaF2 and CaF2:Ln3+ (Ln = Er, Nd, Yb) hierarchical nanoflowers: hydrothermal synthesis and luminescent properties
复制标题
DOI：
10.1039/c0ce00396d
复制
发表时间：
2011-01
期刊：
影响因子：
3.1
通讯作者：
S. Hou;Y. Zou;Xianchun Liu;Xiaodan Yu;Bo Liu;Xiujuan Sun;Y. Xing
中科院分区：
文献类型：
--
作者：
S. Hou;Y. Zou;Xianchun Liu;Xiaodan Yu;Bo Liu;Xiujuan Sun;Y. Xing
以乙二胺四乙酸二钠(Na2EDTA)为络合剂，采用水热法制备了高度均匀的三维花状CaF2和CaF2：Ln3+(Ln=Er，NdYb)纳米结构。尺寸约为550 nm的纳米花是由许多厚度为10 nm的纳米片组装而成的。用X射线衍射仪、扫描电子显微镜、透射电子显微镜、电子衍射和光致发光光谱对材料进行了表征。详细研究了层状CaF2纳米花的形成过程。研究发现，反应时间和络合剂是形成层次化纳米花的关键因素。此外，还讨论了稀土离子(Er、Nd和Yb)掺杂的CaF2纳米结构的近红外发光，特别是在1300-1600 nm范围内的发光，并对其在通信方面的应用特别感兴趣。
Highly uniform three-dimensional flower-like CaF2 and CaF2:Ln3+ (Ln = Er, Nd, Yb) nanostructures have been successfully prepared by a facile hydrothermal method assisted by a chelating reagent, ethylenediamine tetraacetic acid disodium salt (Na2EDTA). The nanoflowers with size about 550 nm are assembled by numerous nanoflakes with a thickness of 10 nm. X-Ray diffraction, scanning electron microscopy, transmission electron microscopy, electron diffraction and photoluminescence spectra were used to characterize these materials. The formation process of the hierarchical CaF2 nanoflowers has been investigated in detail. It is found that reaction time and chelating reagent play a key role in forming the hierarchical nanoflowers. Furthermore, the near-infrared luminescence of lanthanide ion (Er, Nd, and Yb) doped CaF2 nanostructures, especially in the 1300–1600 nm region, is discussed and is of particular interest for telecommunications applications.