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EDTA络合溶胶-凝胶法制备Y2O3:Eu纳米晶

翟永清; 姚子华; 丁士文; 仇满德; 张毅超; 安伟   

  1. 河北大学化学与环境科学学院 保定 071002
  • 收稿日期:2002-01-18 修回日期:2002-03-04 出版日期:2003-03-20 网络出版日期:2003-03-20

Preparation of Nanocrystal Y2O3:Eu by the EDTA Complexing Sol-Gel Method

ZHAI Yong-Qing; YAO Zi-Hua; DING Shi-Wen; QIU Man-De; ZHANG Yi-Cao; AN Wei   

  1. Institute of Chemistry and Environmental Science; HeBei University; Baoding 071002; China
  • Received:2002-01-18 Revised:2002-03-04 Published:2003-03-20 Online:2003-03-20

摘要: 以金属硝酸盐和EDTA为原料,用EDTA络合溶胶-凝胶法制备出Y2O3:Eu纳米晶,并对合成条件进行了优化.分别用TG-DTA、FTIR、XRD、SEM、荧光分光光度计等手段对凝胶的热分解机理,Y2O3:Eu的形成过程以及纳米晶的性质进行了研究.结果表明:硝酸根离子可以加速EDTA凝胶的热分解,仅在600℃焙烧即可得到颗粒细小、组分均匀,纯立方相的’Y2O3:Eu纳米晶,颗粒基本呈球形,粒径随温度升高逐渐长大,600℃时,约为20nm,1000℃时,约为70nm.

关键词: EDTA, 络合物, 溶胶-凝胶, Y2O3:Eu, 纳米晶

Abstract: Nanocrystal Y2O3:Eu was synthesized by the EDTA complexing sol-gel method at lower temperature using metal nitrate and EDTA as raw materials, the synthesis
condition was optimized. The pyrolytic decomposition mechanism of the gel, formation process of Y2O3:Eu and the properties of the particles were investigated
by TG-DTA, XRD, FTIR, SEM, Fluorescence Spectrophotometer. The results show that nitrate ions accelerate the decomposition of the EDTA-gel, and fine, homogenous, pure
cubic phase Y2O3:Eu nanocrystal can be produced after the dry gel calcinated at 600℃ for 2h. The nanoparticles of the Y2O3:Eu are basically
spherical in shape, about 20nm and 70nm in size respectively at 600℃ and 1000℃.

Key words: EDTA, complex, sol-gel, Y2O3:Eu, nanocrystal

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