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Background <p>CQDs are an ideal platform material that integrates excellent optical properties, superior biosafety, flexible, and adjustable chemical properties. They serve as a bridge connecting nanotechnology with fields such as life sciences, environmental energy, and more.</p> Methods <p>In this study, <i>Hc</i>-DES-CQDs based on natural deep eutectic solvents and <i>Houttuynia cordata</i> were successfully prepared.</p> Results <p>The prepared <i>Hc</i>-DES-CQDs exhibits strong blue fluorescence and excellent photostability. The detection of trace Cr<sup>6+</sup> under acidic and alkaline conditions can be realized by <i>Hc</i>-DES-CQDs, and also successfully applied to practical environmental water samples. Spectral analysis reveals that <i>Hc</i>-DES-CQDs exhibits emission behavior related to excitation, with a quantum yield of approximately 17.3%. The <i>Hc</i>-DES-CQDs demonstrated excellent antibacterial and free radical scavenging effects (such as DPPH, ·OH).</p> Conclusions <p>Therefore, the <i>Hc</i>-DES-CQDs has potential applications in the analysis and combating of cellular oxidative stress.</p> Graphical abstract <p></p>

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Houttuynia cordata-DES carbon quantum dots for Cr6+ detection and biological applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月2日

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  • Lifen Meng,
  • Pengpeng Ding,
  • Meiya Ou,
  • Yu Zhang

摘要

Background

CQDs are an ideal platform material that integrates excellent optical properties, superior biosafety, flexible, and adjustable chemical properties. They serve as a bridge connecting nanotechnology with fields such as life sciences, environmental energy, and more.

Methods

In this study, Hc-DES-CQDs based on natural deep eutectic solvents and Houttuynia cordata were successfully prepared.

Results

The prepared Hc-DES-CQDs exhibits strong blue fluorescence and excellent photostability. The detection of trace Cr6+ under acidic and alkaline conditions can be realized by Hc-DES-CQDs, and also successfully applied to practical environmental water samples. Spectral analysis reveals that Hc-DES-CQDs exhibits emission behavior related to excitation, with a quantum yield of approximately 17.3%. The Hc-DES-CQDs demonstrated excellent antibacterial and free radical scavenging effects (such as DPPH, ·OH).

Conclusions

Therefore, the Hc-DES-CQDs has potential applications in the analysis and combating of cellular oxidative stress.

Graphical abstract