The Detection of Pb²⁺ Using Glutathione Capped Mn Doped ZnS QDs

Title:The Detection of Pb²⁺ Using Glutathione Capped Mn Doped ZnS QDs

Volume: 11 Issue: 3

Author(s): Wei Bian, Hao Zhang, Fang Wang, Jing Ma, Yanli Wei, Shaomin Shuang and Zongwei Cai

Affiliation:

Keywords: Mn: ZnS QDs, glutathione, Pb²⁺, fluorescence quenching.

Abstract: L-glutathione decorated Mn doped ZnS QDs (GSH-Mn: ZnS QDs) were synthesized in aqueous solution. The characterization of as-prepared QDs was carried out through fluorescence, ultraviolet-visible absorption (UV-vis), TEM and Fourier transform infrared spectroscopy (FTIR). Pb²⁺ had obvious quenching effect on the fluorescence intensity of GSH-Mn: ZnS QDs. Under optimal factors, a nice linear relationship between the fluorescence response and the concentration of Pb²⁺ was established from 0.025µM to 15.5µM range with a correlation coefficient of 0.9981 and the detection limit is 0.018µ. This probe was triumphantly made use of the detecting of Pb²⁺ in tap and pond water. At the same time, it was preliminary inferred that the fluorescence quenching way of Pb²⁺ to QDs was dynamic quenching. The present study provides a simple, low-cost route toward production of GSH-Mn: ZnS QDs for chemo/bio sensing and other adhibition.

Cite this article as:

Bian Wei, Zhang Hao, Wang Fang, Ma Jing, Wei Yanli, Shuang Shaomin and Cai Zongwei, The Detection of Pb²⁺ Using Glutathione Capped Mn Doped ZnS QDs, Current Analytical Chemistry 2015; 11 (3) . https://dx.doi.org/10.2174/1573411011666150213211128