Abstract
Functionalized carbon nitride quantum dots (CNQDs) are fabricated by moderate carbonization of L-tartaric acid and urea in oil acid media by a facile microwave-assisted solvothermal method. The obtained CNQDs are monodispersed with a narrow size distribution (average size of 3.5 nm), and exhibit excellent selectivity and sensitivity of fluorescence quenching for 2,4,6-trinitrophenol (TNP) with a quenching efficiency coefficient Ksv of 4.75 × 104 M−1. This sensing system exhibits a fast response time within 1 min and a wide linear response range from 0.1 to 15 μM. The limit of detection is as low as 87 nM, which is comparable or lower than the other probes. The application of the developed probe to the detection of TNP in spiked water samples yields satisfactory results. The mechanism of fluorescence quenching is also discussed.
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Acknowledgements
This work was supported by Natural Science Foundation of Fujian Province of China (Nos. 2018 J01510 and 2016Y0065), Science and Technology Projects of Minnan Normal University (No. MK201723).
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Lu, S., Xue, M., Tao, A. et al. Facile Microwave-Assisted Synthesis of Functionalized Carbon Nitride Quantum Dots as Fluorescence Probe for Fast and Highly Selective Detection of 2,4,6-Trinitrophenol. J Fluoresc 31, 1–9 (2021). https://doi.org/10.1007/s10895-020-02633-9
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DOI: https://doi.org/10.1007/s10895-020-02633-9