LaF_3∶Eu纳米管阵列可控制备及荧光性能

Synthesis and Luminescence Properties of LaF_3∶Eu Nanotube Arrays

在多孔氧化铝模板中,采用负压抽滤法制备了LaF3∶Eu纳米管阵列。通过X射线衍射仪、扫描电子显微镜、选区电子衍射和能量色散谱对LaF3∶Eu纳米管的晶相结构、形貌、元素组成进行了表征。研究了Eu3+掺杂量对LaF3∶Eu纳米管荧光性能的影响。结果表明:制备LaF3∶Eu纳米管为非晶态结构,其形貌可控,且纳米管直径均一,直径约为100nm。LaF3∶Eu纳米管中La、F和Eu元素的摩尔比为23.42∶72.94∶3.64。荧光光谱表明,当Eu3+掺杂量为6%(摩尔分数)时,LaF3∶Eu纳米管阵列荧光强度最强。

LaFa3 Eu nanotube arrays were fabricated in the porous anodic aluminum oxide template by a suction filtering method at subatmospheric pressure. The phase structure, morphology and chemical composition of the LaF3 ：Eu nanotubes were char- acterized by X-ray diffraction, scanning electron microscopy, selected area electron diffraction and energy dispersive spectrome- try, respectively. The effect of Eu3＋ -doping amount on the luminescence properties of the LaF3 ： Eu nanotube arrays was inves- tigated. The results show that the LaF3 ： Eu nanotube arrays are amorphous with a controllable morphology, and the size of nanotubes is 100 nm. The mole ratio of La, F and Eu in the LaF~ ： Eu nanotubes is 23.42 ： 72.94： 3.64. According to the photo- luminescence spectra, the LaF3 .＇Eu nanotube arrays have the most intensive fluorescence when the optimum doping amount of Eu3＋ is 6% in mole fraction.