Boletus brunneissimus Chiu carbon dots (Bb-CDs) with good fluorescence performance were successfully prepared by the hydrothermal method (200°C, 12 h) using the edible fungus Boletus brunneissimus Chiu as the carbon source. The Bb-CD fluorescent nanoprobe was applied to detection of riboflavin, and its fluorescence-quenching mechanism was investigated. The structure and optical properties of the Bb-CDs were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible spectroscopy. In the riboflavin concentration (C) range of 0–50 μM, the fluorescence-quenching effect of the Bb-CDs (y) showed a good linear relationship with the riboflavin concentration. The linear equation was y = 0.00304C + 0.02151 (R2 = 0.99497), and the detection limit was 45 nM. Therefore, the Bb-CDs showed high detection sensitivity and a low detection limit for riboflavin. Moreover, the fluorescence-quenching mechanism of the Bb-CDs by riboflavin belonged to the fluorescent inner filter effect. The Bb-CDs were successfully used as a fluorescent nanoprobe to detect riboflavin in actual fruit samples, which provides a new concept for application of CDs to biological detection.
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Abstract of article is published in Zhurnal Prikladnoi Spektroskopii, Vol. 89, No. 6, p. 904, November–December, 2022.
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Meng, L., Xia, Z., Zhang, Y. et al. Nanosensor Composed of N-Doped Carbon Dots for Highly Selective Detection of Riboflavin. J Appl Spectrosc 89, 1212–1219 (2023). https://doi.org/10.1007/s10812-023-01488-9
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DOI: https://doi.org/10.1007/s10812-023-01488-9