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<p>Cyclodextrin (CD)-metal-organic frameworks (MOFs) are developed as a new type nanozyme with excellent peroxidase (POD)-like activity, which shows great potential for biosensing applications. This study aimed to synthesize γ-CD-MOFs from potassium nitrate, crystallized with γ-cyclodextrin (γ-CD), and the POD-like activity were further evaluated using steady-state kinetic and free radicals capture test. Based on the enhancement of sucralose on the POD-like of γ-CD-MOFs, a facile sensitive biosensor was constructed to realize the colorimetric detection for sucralose. The developed colorimetric sensor demonstrated excellent performance in real nicotine e-cigarette liquid pod sample analysis, showing satisfactory recoveries ranging from 97.0% to 102.3% while maintaining a low detection limit of 1.74&#xa0;µg/mL, calculated as 3.3σ/k. This nanozyme-based colorimetric method provides a visual strategy for the detection of sucralose in the e-cigarettes with good specificity and sensitivity.</p> Graphical abstract <p></p>

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Facile colorimetric sensor using peroxidase-like activity of γ-CD-MOF for highly selective detection of sucralose in e-cigarettes

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Qianqian Pang,
  • Zeyi Dong,
  • Zhiting Deng,
  • Dezhi Yang,
  • Jitao Li,
  • Yaling Yang,
  • Zhichao Chen

摘要

Cyclodextrin (CD)-metal-organic frameworks (MOFs) are developed as a new type nanozyme with excellent peroxidase (POD)-like activity, which shows great potential for biosensing applications. This study aimed to synthesize γ-CD-MOFs from potassium nitrate, crystallized with γ-cyclodextrin (γ-CD), and the POD-like activity were further evaluated using steady-state kinetic and free radicals capture test. Based on the enhancement of sucralose on the POD-like of γ-CD-MOFs, a facile sensitive biosensor was constructed to realize the colorimetric detection for sucralose. The developed colorimetric sensor demonstrated excellent performance in real nicotine e-cigarette liquid pod sample analysis, showing satisfactory recoveries ranging from 97.0% to 102.3% while maintaining a low detection limit of 1.74 µg/mL, calculated as 3.3σ/k. This nanozyme-based colorimetric method provides a visual strategy for the detection of sucralose in the e-cigarettes with good specificity and sensitivity.

Graphical abstract