"Switch-Off-On" Detection of Fe3+ and F- Ions Based on Fluorescence Silicon Nanoparticles and Their Application to Food Samples

文献类型： 外文期刊

第一作者： Ye, Hongli

作者： Ye, Hongli;Cai, Youqiong;Chi, Hai;Ye, Hongli;Cai, Youqiong;Zhao, Lukai;Chi, Hai;Ren, Xinghui

作者机构：

关键词： determination; Fe3+ ion; F- ion; fluorescence switch-off-on; silicon nanoparticles; Antarctic krill

期刊名称：NANOMATERIALS （ 影响因子：5.719； 五年影响因子：5.81 ）

ISSN：

年卷期： 2022 年 12 卷 2 期

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收录情况： SCI

摘要： An approach to the detection of F- ions in food samples was developed based on a "switch-off-on" fluorescence probe of silicon nanoparticles (SiNPs). The fluorescence of the synthetic SiNPs was gradually quenched in the presence of Fe3+ ion and slightly recovered with the addition of F- ion owing to the formation of a stable and colorless ferric fluoride. The fluorescence recovery exhibited a good linear relationship (R-2 = 0.9992) as the concentration of F- ion increased from 0 to 100 mu mol center dot L-1. The detection limit of the established method of F- ion was 0.05 mu mol center dot L-1. The recovery experiments confirmed the accuracy and reliability of the proposed method. The ultraviolet-visible spectra, fluorescence decays, and zeta potentials evidenced the fluorescence quenching mechanism involving the electron transfer between the SiNPs and Fe3+ ion, while the fluorescence recovery resulted from the formation of ferric fluoride. Finally, SiNPs were successfully applied to detect F- ions in tap water, Antarctic krill, and Antarctic krill powder.

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