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Carbon quantum dots with green fluorescence as a probe for detecting uric acid

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Green-fluorescent nitrogen-doped carbon quantum dots (g-CQDs) were synthesized via a simple and convenient one-step hydrothermal method using Passiflora edulis sims shell as a carbon source and m-phenylenediamine as a nitrogen source and applied to the detection of uric acid. Unlike most reported blue fluorescent probes, the obtained g-CQDs showed bright-green fluorescence under ultraviolet light with a high quantum yield of 37.6%. Moreover, the g-CQDs exhibit outstanding photostability and high sensitivity, an excellent linearity ranging from 1 to 17 µM, and a great limit of detection of 0.94 µM, which renders them suitable for the determination of uric acid in human urine with remarkable selectivity.

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Acknowledgements

This research was supported by Opening project of Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization No. HZXYKFKT201907.

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Correspondence to Yu-wei Lan.

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Li, GW., Lan, Yw., Peng, Yq. et al. Carbon quantum dots with green fluorescence as a probe for detecting uric acid. Chem. Pap. 76, 3627–3638 (2022). https://doi.org/10.1007/s11696-022-02071-w

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  • DOI: https://doi.org/10.1007/s11696-022-02071-w

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