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. 2023 May 15;190(6):224.
doi: 10.1007/s00604-023-05805-z.

Carbon dots as specific fluorescent sensors for Hg2+ and glutathione imaging

Shaobing Zhang  1 , Haidong Yan  1 , Hongni Li  1 , Tiantian Xu  1 , Hui Li  1   2 , Chengkun Wang  1 , Zheng Yang  3   4   5 , Xiaodan Jia  1   6 , Xiangrong Liu  1   6
Affiliations

Carbon dots as specific fluorescent sensors for Hg2+ and glutathione imaging

Shaobing Zhang et al. Mikrochim Acta. .

Abstract

Nitrogen-doped carbon dots (NCDs) have been constructed in which coal washing wastewater is used as carbon precursor, tryptophan is added for nitrogen doping and surface functional together with polyethylene glycol. The nitrogen doping and surface functional with electron rich groups resulted in excellent fluorescent properties regarding stability, reversibility, printability with high quantum yield which not only enable the NCDs as fluorescent ink for advanced message encryption, but also realize specific on-off-on fluorescent sensing of Hg2+ and GSH as solution, hydrogel and filter paper sensors. The NCDs had a linear range of 0.01-100 μM and a detection limit of 6.27 nM (RSD 0.33%) for Hg2+ and the NCDs@Hg2+ had a linear range of 0.01-60 μM and a detection limit of 3.53 nM (RSD 1.53%) for GSH in sensing studies with aqueous solutions. In addition, with the low cytotoxicity and good biocompatibility NCDs have been successfully used for imaging Hg2+ and GSH in living MG-63 cells. The presented NCDs recycle waste coal washing water into worthwhile material which can be implemented as promising anti-counterfeiting and message encryption candidates as well as effective Hg2+ and GSH sensing, tracking and removing tools in complicated environmental and biological systems.

Keywords: Carbon dots; Cell imaging; Coal washing wastewater; Fluorescent ink; Fluorescent sensor.

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References

    1. Li YJ, Xia WC, Peng YL, Xie GY (2020) A novel coal tar-based collector for effective flotation cleaning of low rank coal. J Clean Prod 273:123172. https://doi.org/10.1016/j.jclepro.2020.123172 - DOI
    1. Wang HN, Yang WQ, Li DL, Zhang CQ, Yan XK, Wang LJ, Zhang HJ (2020) Enhancement of coal flotation using impact flow conditioning pulp. J Clean Prod 262:122124. https://doi.org/10.1016/j.jclepro.2020.122124 - DOI
    1. Zhang ZX, Yan GH, Zhu GQ, Zhao PF, Ma ZJ, Zhang B (2020) Microwave pretreatment improves the high-gradient magnetic-separation desulfurization of pulverized coal before combustion. Fuel 274:117826. https://doi.org/10.1016/j.fuel.2020.117826 - DOI
    1. Ütnü YE, Okutan H, Aydın AA (2020) Polycyclic aromatic hydrocarbon (PAH) content of malkara lignite and its ex-situ underground coal gasification (UCG) char residues. Fuel 275:117949. https://doi.org/10.1016/j.fuel.2020.117949 - DOI
    1. Vaseem H, Singh VK, Singh MP (2017) Heavy metal pollution due to coal washery effluent and its decontamination using a macrofungus, pleurotus ostreatus. Ecotoxicol Environ Safety 145:42–49. https://doi.org/10.1016/j.ecoenv.2017.07.001 - DOI - PubMed

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