高等学校化学学报

高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (3): 401.

• 研究论文 • 上一篇    下一篇

稀土掺杂氟化镁钾纳米晶的合成及其光谱特性

朱国贤1,3,闫景辉2,莫凤珊1,连洪州3,石春山3   

  1. 1. 湛江师范学院生命科学与化学学院,湛江 524048; 2. 长春理工大学材料与化工学院,长春 130022;
    3. 中国科学院稀土化学与物理重点实验室,长春 130022
  • 收稿日期:2005-08-22 出版日期:2006-03-10 发布日期:2006-03-10
  • 通讯作者: 石春山(1939年出生),男,研究员,博士生导师,从事稀土固体化学研究. E-mail: cshi@ciac.jl.cn
  • 基金资助:

    国家自然科学基金(批准号： 90201032)资助.

Synthesis and Spectral Properties of Eu2+/Ce3+ Doped Potassium Magnesium Fluoride Nanoparticles

ZHU Guo-Xian1,3,YAN Jing-Hui2,MO Feng-Shan1 ,LIAN Hong-Zhou3,SHI Chun-Shan3*   

  1. 1. School of Life Science and Chemistry,Zhanjiang Normal College,Zhanjiang 524048,China; 2. Department of
    Materials and Chemical Engineering,Changchun University of Science and Technology,Changchun 130022,China;
    3. Key Laboratory of Rare Earth Chemistry and Physics,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2005-08-22 Online:2006-03-10 Published:2006-03-10

PDF (PC)

被引次数

36

摘要：

采用微乳液法合成了Eu2+,Ce3+单掺和双掺KMgF3纳米晶,分析了样品的结构与形态. 结果表明,所合成的样品均为单相,颗粒粒度分布均匀. 讨论了光谱特性并与高温固相法合成的产物作了对比. 研究发现,在KMgF3纳米晶双掺体系中,由于Eu2+和Ce3+竞争吸收激发能,只能观察到Ce3+的发射带; 而在KMgF3多晶共掺体系中,因为存在Ce3+→Eu2+能量传递过程,只能观察到Eu2+的发射峰.

关键词: 微乳液; 稀土离子; KMgF3纳米晶;  光谱;  能量传递

Abstract:

Phosphors of KMgF3∶Eu2+, KMgF3∶Ce3+and KMgF3∶Eu2+,Ce3+nanoparticles were synthesized in cetyltrimethylammonium bromide(CTAB)/2-octanol/water microemulsion systems. X-ray diffraction(XRD) patterns was used to identify the formation of KMgF3 phase without detectable impurity. Environment scanning electron microscopy(ESEM) images show the even size distribution of the nanoparticles with pellet morphology. Photoluminescence characteristics of the rare earth ions doped nanoparticles were investigated and compared with that of the polycrystalline products prepared by solid state reaction at a high temperature. The emission band of the Ce3+ could only be observed due to absorbing the exciting energy competitively between the Eu2+ and Ce3+ in co-doped system of KMgF3 nanoparticles,while the emission peak of the Eu2+could only be observed due to energy transfer from Ce3+ to Eu2+appearing in the KMgF3∶Eu2+,Ce3+polycrystalline powder. The mechanism on energr transfer from Ce3+ to Eu2+ in polycrystal and from Eu2+ to Ce3+in nanocrystal KMgF3∶Eu2+,Ce3+was discussed by means of Eu2+ excitation spectrum and Ce3+emission spectrum.

Key words: Microemulsion; Rare earth ion; KMgF3 nanoparticles; Spectroscopy; Energy transfer

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