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<p>We report the synthesis of Fe-shell-doped (ZnCuInS/FeZnS) quaternary quantum dots (QDs) <i>via</i> a simple and eco-friendly aqueous method as fluorescence "switch-off" probes for detecting 2,4,6-trinitrophenol (TNP) in water. The as-synthesised QDs were quasi-spherical with a size of 2.28&#xa0;nm and showed enhanced absolute photoluminescence quantum yield (PLQY) and an average lifetime of 40.43&#xa0;ns compared to core-doped and undoped QDs. These QDs detected TNP in contaminated deionized and river water with low detection limits of 23.83&#xa0;mM and 47.91&#xa0;mM, respectively, outperforming undoped QDs. This indicates their strong potential for TNP sensing in water samples.</p> Graphical Abstract <p></p>

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Synthesis of Fe-doped ZnCuInS/ZnS QDs and their potential as fluorescence ‘‘switch OFF” for 2, 4, 6-trinitrophenol (TNP) detection

  • 期刊论文

  • 发表日期：

    2025年11月23日

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  • Nande Mgedle,
  • Oluwatobi Samuel Oluwafemi

摘要

We report the synthesis of Fe-shell-doped (ZnCuInS/FeZnS) quaternary quantum dots (QDs) via a simple and eco-friendly aqueous method as fluorescence "switch-off" probes for detecting 2,4,6-trinitrophenol (TNP) in water. The as-synthesised QDs were quasi-spherical with a size of 2.28 nm and showed enhanced absolute photoluminescence quantum yield (PLQY) and an average lifetime of 40.43 ns compared to core-doped and undoped QDs. These QDs detected TNP in contaminated deionized and river water with low detection limits of 23.83 mM and 47.91 mM, respectively, outperforming undoped QDs. This indicates their strong potential for TNP sensing in water samples.

Graphical Abstract