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Carbon nanodots derived from biomass and their spectral-matching sensing of chromium (VI)

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Abstract

Here, fluorescent carbon nanodots (CNDs) were generated using water extract of tomato leaves. Sphere nanodots were formed within 30 min by a one-step microwave heating. An ultraviolet 360 nm photoluminescence (PL) peak was found upon high-energy excitation. This peak showed excitation-independent property, and might belong to some solely-emitting fluorescent moieties attaching to the CNDs. The biomolecules with complex chemical structure in the plant leaves were responsible for the unique spectral property of the CNDs. Taking advantage of their special property, the CNDs were applied as an fluorescent probe for spectral-matching sensing of chromium(VI) [Cr(VI)] in the aqueous solution. The detection limit was as low as 79 nM, and the CNDs probe showed good selectivity towards other metal ions. Real sample tests using the tap water were also carried out, showing potential of the CNDs in the practical applications.

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Acknowledgements

H. Wang, Y Wang and J. Cao contributed equally to this work. This work was supported by Sanming Project of Medicine in Shenzhen (SZSM201612078), and The Introduction Project of Clinical Medicine Expert Team for Suzhou (SZYJTD201714), Development Project of Shanghai Peak Disciplines-Integrative Medicine (20180101), Shanghai Talent Development Funding Scheme (2020080), Shanghai Committee of Science and Technology (19441902000) and Shanghai Sailing Program (21YF1404100).

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Authors and Affiliations

  1. Department of Physics, Shanghai Normal University, Guilin Road 100, Shanghai, 200234, People’s Republic of China

    Jun Cao & Liman Sai

  2. Laboratory of Tumor Molecular Biology, School of Basic Medical Sciences, Shanghai University of Medicine and Health Sciences, 279 Zhouzhu Road, Pudong New District, Shanghai, 201318, China

    Hui Wang

  3. Department of Radiology, Fudan University Shanghai Cancer Center, 270 Dong-An Road, Shanghai, 200032, China

    Yueming Wang

  4. Department of Sports Medicine, Huashan Hospital, Fudan University, No 12 Wulumuqizhong Road, Jing‘an District, Shanghai, 200040, China

    Peng Wang, Huizhu Li, Huaixuan Sheng, Luyi Sun & Jun Chen

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  1. Hui Wang
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  2. Yueming Wang
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  3. Jun Cao
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  4. Peng Wang
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Correspondence to Liman Sai or Jun Chen.

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Wang, H., Wang, Y., Cao, J. et al. Carbon nanodots derived from biomass and their spectral-matching sensing of chromium (VI). J IRAN CHEM SOC 19, 4535–4543 (2022). https://doi.org/10.1007/s13738-022-02650-4

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