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<p>Carbon dots-based nanozymes show great potential for chemiluminescence (CL) detection due to their stability, excellent catalytic properties, good biocompatibility, and facile synthesis. In this study, bimetallic carbon dot nanoenzymes (Cur/Cu, Fe@CDs) that promote the chemiluminescence signal of luminol were synthesized. Cur/Cu, Fe@CDs possess high peroxidase (POD) activity and can catalyze the luminol/hydrogen peroxide reaction to generate a strong chemiluminescence intensity, which is approximately 8.98 times higher than the chemiluminescence spectral signal produced by the same concentration of K<sub>3</sub>[Fe(CN)<sub>6</sub>]. Additionally, a sensitive and rapid method for detecting magnesium ions (Mg<sup>2+</sup>) was developed by leveraging the enhancing effect of Mg<sup>2+</sup> on the CL signal in this system. The proposed CL technique for Mg<sup>2+</sup> demonstrated a linear response range from 3.33 to 166.67 µM and a detection limit of 0.99 µM. Moreover, the method was successfully applied to analyze Mg<sup>2+</sup> in cigarette paper samples through a spiking procedure, achieving a recovery rate of 91.1% to 109.0%. This research offers substantial evidence supporting the advancement of efficient and sensitive platforms for Mg<sup>2+</sup> CL detection.</p>

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Bimetallic Carbon Dots Cur/Cu, Fe@CDs Nanozymes Enhanced Luminol Chemiluminescence for the Determination of Magnesium Ions

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Jianlong Gu,
  • Li Gao,
  • Jieyun Cai,
  • Yuchen Liu,
  • Hongming Meng,
  • Jie Long,
  • Jing Ma,
  • Bing Yang,
  • Chunqiong Wang,
  • Yaling Yang

摘要

Carbon dots-based nanozymes show great potential for chemiluminescence (CL) detection due to their stability, excellent catalytic properties, good biocompatibility, and facile synthesis. In this study, bimetallic carbon dot nanoenzymes (Cur/Cu, Fe@CDs) that promote the chemiluminescence signal of luminol were synthesized. Cur/Cu, Fe@CDs possess high peroxidase (POD) activity and can catalyze the luminol/hydrogen peroxide reaction to generate a strong chemiluminescence intensity, which is approximately 8.98 times higher than the chemiluminescence spectral signal produced by the same concentration of K3[Fe(CN)6]. Additionally, a sensitive and rapid method for detecting magnesium ions (Mg2+) was developed by leveraging the enhancing effect of Mg2+ on the CL signal in this system. The proposed CL technique for Mg2+ demonstrated a linear response range from 3.33 to 166.67 µM and a detection limit of 0.99 µM. Moreover, the method was successfully applied to analyze Mg2+ in cigarette paper samples through a spiking procedure, achieving a recovery rate of 91.1% to 109.0%. This research offers substantial evidence supporting the advancement of efficient and sensitive platforms for Mg2+ CL detection.