Highly sensitive fluorescent quantification of carbendazim by two-dimensional Tb-MOF nanosheets for food safety

作者：Ting Wang, Lei Zhang, Lei Zhang, Jieyuan Zhang, Jieyuan Zhang, Gaoxian Guo, Xinhui Jiang, Zhengwei Zhang, Siqiao Li · 发表于：Food Chemistry · 年份：2023 · DOI：10.1016/j.foodchem.2023.135853 · 被引用次数：68 · 研究领域：Carbon and Quantum Dots Applications、Molecular Sensors and Ion Detection、Luminescence and Fluorescent Materials

Carbendazim (CBZ), a well-known benzimidazole pesticide, is utilized in agriculture to prevent and cure plant diseases caused by fungi. Residual CBZ in food poses serious threat to human health. Herein, a fluorescent two-dimensional terbium-based metal–organic framework (2D Tb-MOF) nanosheet sensor was developed for the rapid and ultrasensitive detection of CBZ. The 2D Tb-MOF nanosheets , prepared with Tb 3+ ions and 5-borono-1,3-benzenedicarboxylic acid (BBDC) as the precursors, exhibited excellent optical properties. Upon the addition of CBZ, the fluorescence of Tb-MOF nanosheets was quenched because of the inner filter effect (IFE) and dynamic quenching. The fluorescence sensor offered two linear ranges of 0.06–4 and 4–40 µg/mL with a low detection limit of 17.95 ng/mL. Furthermore, the proposed sensing platform was successfully applied to assay CBZ in apples and tea, and satisfactory results were obtained. This study provides an effective alternative strategy for the qualitative and quantitative determination of CBZ to ensure food safety.