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Green Synthesis of Carbon Quantum dots Derived from Lycium barbarum for Effective Fluorescence Detection of Cr (VI) Sensing

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Abstract

Green and economical self-doped nitrogen-containing fluorescent carbon quantum dots (N-CQDs) were synthesized using a one-pot hydrothermal treatment method. The optical and structural properties of the N-CQDs were investigated in detail by UV-vis and fluorescence spectroscopy, X-ray diffraction (XRD) techniques, transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) spectroscopy, and elemental analysis illustrate the surface function and composition of N-CQDs. N-CQDs emit a broad fluorescence between365 ̴ 465 nm and fluoresce most strongly at the excitation wavelength of 415 nm. Meanwhile, Cr (VI) could significantly burst the fluorescence intensity of N-CQDs. N-CQDs showed an excellent sensitivity and selectivity to Cr (VI), which exhibited good linearity in the range of 0 ̴ 40 µmol/L with a detection limit of 0.16 µmol/L. In addition, the mechanism of Fluorescence quenching of N-CQDs by Cr (VI) was investigated. This work well provides a research idea for the preparation of green carbon quantum dots from biomass and their use for the detection of metal ions.

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Funding

This research was found by the National Natural Science Foundation of China (21964016), **njiang National Science Fund for Distinguished Young Scholars (2022D01E37) Key programs of **njiang Natural Science Foundation(2022B02051), and Tianshan Innovation Team Program of **njiang Uygur Autonomous Region (2020D14038).

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Authors and Affiliations

  1. **njiang Key Laboratory of Solid-State Physics and Devices, Urumqi, **njiang, 830046, China

    Jierong **e, Zhaofeng Wu, Jun Sun, Changwu Lv & Qihua Sun

  2. School of Physics Science and Technology, **njiang University, Urumqi, **njiang, 830046, China

    Jierong **e, Zhaofeng Wu, Jun Sun, Changwu Lv & Qihua Sun

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  1. Jierong **e
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  2. Zhaofeng Wu
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  3. Jun Sun
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  4. Changwu Lv
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Contributions

Authors’ Contributions Conceptualization and supervision: Zhaofeng Wu, Changwu Lv; major contributor in the experimental analysis and writing the manuscript: Jierong **e; review: Jun Sun, Qihua Sun.

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Correspondence to Zhaofeng Wu or Changwu Lv.

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**e, J., Wu, Z., Sun, J. et al. Green Synthesis of Carbon Quantum dots Derived from Lycium barbarum for Effective Fluorescence Detection of Cr (VI) Sensing. J Fluoresc 34, 571–578 (2024). https://doi.org/10.1007/s10895-023-03300-5

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