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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (19): 2170-2173. 上一篇    下一篇

研究简报

SiO2/LaF3:Eu3＋核壳结构发光粒子的制备与表征

刘桂霞* 王进贤 苏瑞相 董相廷

  

  1. (长春理工大学化学与环境工程学院 长春 130022)

  • 投稿日期:2007-10-16 修回日期:2008-04-10 发布日期:2008-10-14
  • 通讯作者: 刘桂霞

Preparation and Characterization of SiO2/LaF3:Eu3＋ Core-Shell Structural Luminescence Particles

LIU, Gui-Xia* WANG, Jin-Xian SU, Rui-Xiang DONG, Xiang-Ting   

  1. (School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022)
  • Received:2007-10-16 Revised:2008-04-10 Published:2008-10-14
  • Contact: LIU, Gui-Xia

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采用简单的液相法合成了SiO2/LaF3:Eu3＋核壳结构发光粒子, 并对其结构及发光性能进行了表征. XRD分析表明包覆层LaF3:Eu3＋为立方晶相结构, 红外光谱表明SiO2颗粒表面有柠檬酸的修饰, 电镜照片表明合成了球形的核-壳结构的复合粒子, 包覆层厚度为10～20 nm, 光谱测试表明核-壳复合粒子与纯的LaF3:Eu3＋具有相同的发光性能, 均以589 nm附近的5D0—7F1磁偶极跃迁为最强发射峰, 说明Eu3＋在LaF3基质中占据的格位相同.

关键词: LaF3:Eu3＋, 核壳结构, 发光

SiO2/LaF3:Eu3＋ core-shell structural luminescence particles were prepared by a wet method, and the structure and luminescence properties were characterized. XRD patterns showed that the coated LaF3:Eu3＋ layer took a cubic crystal phase. FTIR spectra indicated that the citric acid was modified on the silica surface. TEM images presented that the core-shell composite particles were all in sphere shape, and the coating layer was about 10～20 nm. The photoluminescence properties were shown to be the same as those of the pure LaF3:Eu3＋, and the strong emission peak is near 589 nm which is corresponding to 5D0—7F1 magnetic dipole transition of Eu3＋, suggesting that Eu3＋ is located at the same lattice phase in both the core-shell particles and the pure particles.

Key words: LaF3:Eu3＋, core-shell structure, luminescence