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- Title
Polyethyleneimine-Protected Ag2S Quantum Dots for Near-Infrared Fluorescence-Enhanced Detection of Trace-Level Hg2+ in Water.
- Authors
You, J. Q.; Yan, D.; He, Y.; Zhou, J. G.; Ge, Y. L.; Song, G. W.
- Abstract
In this work, we have developed a near-infrared emissive polyethyleneimine capped Ag2(PEI-Ag2S QD) quantum dots based chemosensor for sensing trace-level Hg2+ in water by taking advantage of the metal-induced aggregation strategy. The fluorescence determination of Hg2+ by PEI-Ag2S QD at different pH (pH 4, 7, and 10) were performed, respectively. Under the optimum conditions, the selectivity of this system for Hg2+ over other metal ions in aqueous solutions was remarkably high, and its detection limits was 0.5 nM at pH 4. In addition, the present approach provides the advantages of rapidity, simplicity, low background and low cost. The assay also offers great potential for specific detection of Hg2+ in real water samples. This developed PEI-Ag2S QD-based method presages more opportunities for application in environmental systems.
- Subjects
QUANTUM dots; QUANTUM dot synthesis; AQUEOUS solutions; WATER sampling; DETECTION limit; POLYETHYLENEIMINE; METAL content of water
- Publication
Journal of Water Chemistry & Technology, 2020, Vol 42, Issue 1, p36
- ISSN
1063-455X
- Publication type
Article
- DOI
10.3103/S1063455X20010105