大气与环境光学学报 ›› 2013, Vol. 8 ›› Issue (6): 422-427.

• 环境光学监测技术 • 上一篇    下一篇

巯基乙胺修饰的CdTe量子点对Co2+的荧光响应

甘婷婷, 张玉钧, 赵南京, 肖雪, 殷高方, 石朝毅   

  1. (中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽 合肥 230031)
  • 出版日期:2013-11-28 发布日期:2013-11-06
  • 通讯作者: 甘婷婷(1986—),女,辽宁锦州人,研究实习员,硕士,主要从事水体荧光检测方面的研究。 E-mail:tingtinggan@163.com
  • 作者简介:甘婷婷(1986—),女,辽宁锦州人,研究实习员,硕士,主要从事水体荧光检测方面的研究。
  • 基金资助:

    国家863计划(2013AA065502)、安徽省自然科学基金(11040606M26),安徽省杰出青年科学基金(1108085J19),安徽光学精密机械研究所所长基金(Y03AG31144),中国科学院仪器设备功能开发技术创新项目(yg2012071)资助

Fluorescence Response of Cysteamine Modified CdTe Quantum Dots to Co2+

GAN Ting-ting, ZHANG Yu-jun, ZHAO Nan-jing, XIAO Xue, YIN Gao-fang, SHI Chao-yi   

  1. (Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China)
  • Published:2013-11-28 Online:2013-11-06

摘要:

采用水热合成方法制备出不同粒径大小的巯基乙胺(CA)修饰的CdTe(CA-CdTe)量子点,并研究CA-CdTe量子点对Co2+的荧光响应情况。研究表明Co2+对CA-CdTe量子点的荧光具有猝灭作用,并且随着Co2+浓度的增加,CA-CdTe量子点的荧光强度逐渐降低。当Co2+浓度在0.3×10-5~33×10-5 mol•L-1范围内时,获得了Co2+与粒径大小为3.60 nm的CA-CdTe量子点相互作用的Stern-Volmer荧光猝灭方程,线性相关系数R2为0.998,检出限为6.547×10-7 mol•L-1。利用CA-CdTe量子点荧光分析方法对Co2+进行定量分析和检测研究,该方法简便、快速、检出限较低,并为实际水样中Co2+的检测分析提供了理论基础。

关键词: CdTe量子点, 水热合成, 荧光分析, Co2+, 检测

Abstract:

The cysteamine (CA) modified CdTe (CA-CdTe) quantum dots (QDs) with different particle sizes were prepared by hydrothermal method. And the fluorescence response of CA-CdTe QDs to Co2+ was measured and analysed. The results indicate that Co2+ can quench the fluorescence of CA-CdTe QDs, with the increase of Co2+ concentration, the fluorescence intensity of CA-CdTe QDs was gradually decreased. When Co2+ concentration is in the range of 0.3×10-5~33×10-5 mol•L-1, the Stern-Volmer quenching equation of the interaction between Co2+ and CA-CdTe QDs with particle size 3.60 nm is obtained, and the detection limit is 6.547×10-7 mol•L-1. The method of quantitative detection of  Co2+ based on the CA-CdTe QDs fluorescence analysis method is simple, rapid, and with low detection limits, which provides a theoretical basis for detecting Co2+ in real water samples.

Key words: CdTe QDs, hydrothermal synthesis, fluorescence analysis, Co2+, detection

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