高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (1): 36.doi: 10.7503/cjcu20120715

• 研究论文: 无机化学 • 上一篇    下一篇

LaAlO3: 0.05Eu3+微晶的水热合成与表征

王晓丽, 杨智   

  1. 云南师范大学化学化工学院, 昆明 650500
  • 收稿日期:2012-08-02 发布日期:2012-12-31
  • 通讯作者: 杨智,男,博士,教授,主要从事无机材料化学研究.E-mail:kmyangz@hotmail.com E-mail:kmyangz@hotmail.com

Hydrothermal Synthesis and Characterization of LaAlO3: 0.05Eu3+ Microcrystals

WANG Xiao-Li, YANG Zhi   

  1. College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, China
  • Received:2012-08-02 Published:2012-12-31

摘要:

通过水热反应合成了六角形LaAlO3: 0.05Eu3+微晶样品, 采用X射线粉末衍射(XRD)、 扫描电子显微镜(SEM)、 能量色散X射线(EDX)和荧光光谱(PL)对产物进行表征, 讨论了反应温度和NaOH浓度对LaAlO3合成的影响. XRD分析表明, 所合成的样品属三方晶系(空间群R33c), 对LaAlO3: 0.05Eu3+样品的X射线粉末衍射数据进行Rietveld精修, 最终R因子为Rp=6.79%, Rwp=8.96%; 其晶胞参数为a=b=0.53636(2) nm, c=1.3101(1) nm. SEM分析表明, LaAlO3: 0.05Eu3+微晶具有六角形形貌, 颗粒较均匀, 平均尺寸约为4 μm. PL分析表明, LaAlO3: 0.05Eu3+微晶的特征发射为Eu3+的+5D07F1跃迁发射.

关键词: LaAlO3: 0.05Eu3+, 水热合成, 发光性质

Abstract:

Uniform hexagonal microcrystals of LaAlO3:0.05Eu3+ of trigonal system were synthesized by a simple hydrothermal method and the effects of temperature and the concentration of NaOH solution were investigated. The obtained samples were characterized by scanning electron microscopy(SEM), energy dispersive X-ray spectrometry(EDX), X-ray diffraction(XRD) and photoluminescence(PL) spectra. The diffraction data of LaAlO3:0.05Eu3+ samples were refined by the Rietveld method using GSAS program on the basis of the strutural model of LaAlO3. The agreement factors are Rp=6.79% and Rwp=8.96%. Its lattice parameters are a=b=0.53636(2) nm and c=1.3101(1) nm. SEM image exhibits the uniform hexagonal shapes of the as-synthesized LaAlO3:0.05Eu3+ microcrystals with an average diameter of about 4 μm. The PL spectrum shows that the characterization emission of LaAlO3:0.05Eu3+ is attributed to the 5D07F1 magnetic dipole transition of Eu3+.

Key words: LaAlO3: 0.05Eu3+, Hydrothermal synthesis, Luminescent property

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