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<p>In order to detect quercetin using photoluminescence spectroscopy, graphitic carbon nitride nanosheets coated with Sm<sup>3+</sup> (Sm-gn) are synthesized in this work. Sm-gn was synthesized by a hydrothermal technique using melamine and samarium nitrate and characterized using advanced techniques such as XPS, FE-SEM, HR-TEM, IR, UV–Vis absorption, PL, and XRD. Detailed studies were conducted on the smartphone study, surface morphology, elemental composition, and photoluminescence properties of the fluorophore. The addition of quercetin led to a significant decrease in the fluorescence intensity of Sm-gn, primarily due to electrostatic interaction and hydrogen bonding. The detection limits were measured at 46.21&#xa0;nM for fluorescence and linear detection ranges of 0–140&#xa0;nM. These results highlight the potential of Sm-gn nanomaterials for accurate quercetin detection in industrial, food, beverage, and biological applications, owing to their stable and prominent photoluminescence. Furthermore, Our created nanosensor also detected quercetin by using smartphone software and captured the fluorescent color shift of the solution when it was detected.</p> Graphical abstract <p></p>

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Graphitic carbon nitride nanosheets decorated with Sm3+ as an optical detection of quercetin

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Jyoti Duhan,
  • Bindu Dhuva,
  • Sangeeta Obrai

摘要

In order to detect quercetin using photoluminescence spectroscopy, graphitic carbon nitride nanosheets coated with Sm3+ (Sm-gn) are synthesized in this work. Sm-gn was synthesized by a hydrothermal technique using melamine and samarium nitrate and characterized using advanced techniques such as XPS, FE-SEM, HR-TEM, IR, UV–Vis absorption, PL, and XRD. Detailed studies were conducted on the smartphone study, surface morphology, elemental composition, and photoluminescence properties of the fluorophore. The addition of quercetin led to a significant decrease in the fluorescence intensity of Sm-gn, primarily due to electrostatic interaction and hydrogen bonding. The detection limits were measured at 46.21 nM for fluorescence and linear detection ranges of 0–140 nM. These results highlight the potential of Sm-gn nanomaterials for accurate quercetin detection in industrial, food, beverage, and biological applications, owing to their stable and prominent photoluminescence. Furthermore, Our created nanosensor also detected quercetin by using smartphone software and captured the fluorescent color shift of the solution when it was detected.

Graphical abstract