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Issue 19, 2017
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Highly fluorescent N,S-co-doped carbon dots: synthesis and multiple applications

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Abstract

In this study, N and S co-doped carbon dots (N,S-CDs) were synthesized from biomass, using sulfamic acid as a passivator. The N,S-CDs have satisfying fluorescence properties with a quantum yield of 24.1%. It has been shown that the N,S-CDs have low cytotoxicity and can be used as multicolor probes for cell imaging. In addition, the N,S-CDs have excellent antioxidant abilities for scavenging DPPH free radicals, hydroxyl free radicals and superoxide anion free radicals. Moreover, the fluorescence of the N,S-CDs can be quenched by Cr(VI) because of the inner filter effect (IFE). Accordingly, the fluorescence response for this Cr(VI) assay leads to a broad linear range of 1 to 200 μM, associated with a limit of detection of 0.76 μM. Furthermore, this N,S-CD-based fluorescence platform for Cr(VI) detection was successfully applied in real lake water, human serum and living cells.

Graphical abstract: Highly fluorescent N,S-co-doped carbon dots: synthesis and multiple applications

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Publication details

The article was received on 15 Feb 2017, accepted on 25 Aug 2017 and first published on 25 Aug 2017


Article type: Paper
DOI: 10.1039/C7NJ00505A
Citation: New J. Chem., 2017,41, 11125-11137
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    Highly fluorescent N,S-co-doped carbon dots: synthesis and multiple applications

    J. Shen, T. Zhang, Y. Cai, X. Chen, S. Shang and J. Li, New J. Chem., 2017, 41, 11125
    DOI: 10.1039/C7NJ00505A

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