The detection of Pb2+ using glutathione capped mn doped ZnS QDs

Wei Bian, Hao Zhang, Fang Wang, Jing Ma, Yanli Wei, Shaomin Shuang*, Zongwei CAI

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

1 Citation (Scopus)


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 0.018μM. 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.

Original languageEnglish
Pages (from-to)168-174
Number of pages7
JournalCurrent Analytical Chemistry
Issue number3
Publication statusPublished - 1 May 2015

Scopus Subject Areas

  • Analytical Chemistry

User-Defined Keywords

  • Fluorescence quenching
  • Glutathione
  • Mn: ZnS QDs
  • Pb


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