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<p>In this study, a one-step hydrothermal method was employed to synthesise highly fluorescent carbon quantum dots (Mn, N-CDs), incorporating the metallic element manganese (Mn) and the non-metallic element nitrogen (N). Banana peels and potassium permanganate were utilised as the raw materials. Characterisation methods were used to investigate the structure and properties of the Mn, N-CDs, revealing that they exhibited excellent fluorescence performance. The Mn, N-CDs was then applied as a fluorescent probe for penicillin detection, revealing that it significantly affected the fluorescence intensity of the Mn, N-CDs via a static quenching mechanism. Furthermore, the concentration of ampicillin sodium exhibited a strong linear relationship within the range of 0.05–20&#xa0;µg/mL. Furthermore, antibiotics in environmental wastewater were analysed and spiked recovery experiments were performed. The results showed that ampicillin sodium recovery was 96.0-98.20%, with an RSD of less than 2.41%. In summary, this method provides a novel nanosensing platform for the rapid detection of antibiotic residues, with potential applications in environmental testing.</p>

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Preparation of doped Mn, N-CDs and their application in the detection of ampicillin

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月6日

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  • Min Ye,
  • Yinying Zhang,
  • Pengpeng Ding,
  • Lifen Meng

摘要

In this study, a one-step hydrothermal method was employed to synthesise highly fluorescent carbon quantum dots (Mn, N-CDs), incorporating the metallic element manganese (Mn) and the non-metallic element nitrogen (N). Banana peels and potassium permanganate were utilised as the raw materials. Characterisation methods were used to investigate the structure and properties of the Mn, N-CDs, revealing that they exhibited excellent fluorescence performance. The Mn, N-CDs was then applied as a fluorescent probe for penicillin detection, revealing that it significantly affected the fluorescence intensity of the Mn, N-CDs via a static quenching mechanism. Furthermore, the concentration of ampicillin sodium exhibited a strong linear relationship within the range of 0.05–20 µg/mL. Furthermore, antibiotics in environmental wastewater were analysed and spiked recovery experiments were performed. The results showed that ampicillin sodium recovery was 96.0-98.20%, with an RSD of less than 2.41%. In summary, this method provides a novel nanosensing platform for the rapid detection of antibiotic residues, with potential applications in environmental testing.