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  • Title: Highly fluorescent N doped C-dots as sensor for selective detection of Hg2+ in beverages.
    Author: Fu WJ, Peng ZX, Dai Y, Yang YF, Song JY, Sun W, Ding B, Gu HW, Yin XL.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2022 Jan 15; 265():120392. PubMed ID: 34547686.
    Abstract:
    In this work, nitrogen doped carbon dots (NCDs) were synthesized through one step hydrothermal reaction using citric acid and ethylenediamine as precursors. The prepared NCDs exhibit high quantum yield of 67.4%, good stability, excellent selectivity and sensitivity. It was found that the NCDs have potential as a fluorescence sensor for the detection of Hg2+. Under optimal conditions, good linearity between the change in NCDs fluorescence intensity and Hg2+ concentration was obtained in the range of 0.3 to 2.0 μM with a detection limit at 0.24 μM. The possible detection mechanism was static quenching of NCDs by Hg2+. The established method was successfully applied to the determination of Hg2+ in beverage samples. The results indicated that the NCDs-based sensor has potential for detection of Hg2+ in real beverage sample.
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