巯基乙胺修饰的CdTe量子点对Co<sup>2+</sup>的荧光响应

甘婷婷; 张玉钧; 赵南京; 肖雪; 殷高方; 石朝毅

doi:doi:10.3969/j.issn.1673-6141.2013.06.004

大气与环境光学学报, 2013, 8 (6): 422, 网络出版: 2013-12-04

巯基乙胺修饰的CdTe量子点对Co²⁺的荧光响应

Fluorescence Response of Cysteamine Modified CdTe Quantum Dots to Co²⁺

论文大纲

甘婷婷 ^*张玉钧赵南京肖雪殷高方石朝毅

作者单位

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

CdTe量子点水热合成荧光分析检测 CdTe QDs hydrothermal synthesis fluorescence analysis Co2+ Co2+ detection

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。

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.

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甘婷婷, 张玉钧, 赵南京, 肖雪, 殷高方, 石朝毅. 巯基乙胺修饰的CdTe量子点对Co²⁺的荧光响应[J]. 大气与环境光学学报, 2013, 8(6): 422. GAN Ting-ting, ZHANG Yu-jun, ZHAO Nan-jing, XIAO Xue, YIN Gao-fang, SHI Chao-yi. Fluorescence Response of Cysteamine Modified CdTe Quantum Dots to Co²⁺[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(6): 422.

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