期刊
LUMINESCENCE
卷 37, 期 1, 页码 118-126出版社
WILEY
DOI: 10.1002/bio.4152
关键词
carbon dots; food samples; inner filter effect; self-exothermic reaction; sunset yellow
资金
- Innovative Funds Plan of Henan University of Technology [2020ZKCJ03]
- open project of Engineering Technology Research Center for Grain & Oil Food, State Administration of Grain [GA2018007]
The research successfully prepared water-soluble fluorescent nitrogen-doped carbon dots (N-CDs) from locust powder through a self-exothermic reaction, and characterized them using various analytical methods. N-CDs exhibited excitation wavelength dependent fluorescence emission behavior with a strong emission peak at 470nm under 390nm excitation wavelength, and can be quenched by sunset yellow (SY), demonstrating high selectivity and sensitivity towards SY.
Locust powder was converted into water-soluble fluorescent nitrogen-doped carbon dots (N-CDs) with gram-scale yield through a self-exothermic reaction between nitric acid and diethylenetriamine (DETA) within 10 min. The morphology, elemental information, and optical properties of the N-CDs were characterized using high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared, ultraviolet-visible and fluorescence spectroscopy. Spectroscopic investigation indicated that the fluorescence emission behaviour of N-CDs is excitation wavelength dependent, with the strongest emission peak at 470 nm using a 390 nm excitation wavelength. The strong absorption peak of sunset yellow (SY) at 482 nm overlaps substantially with the blue emission peak (470 nm) of N-CDs. This enables the fluorescence emission of N-CDs to be obviously quenched by SY through the inner filter effect. There was a good linear relationship between the fluorescence quenching degree and the concentrations of SY within the range 0.5-40 mu M. The detection limit of developed fluorescence assay for SY is 28 nM, and the relative standard deviation is 2.3% (c = 10 mu M). The N-CDs derived from locusts by the self-exothermic reaction are highly selective and sensitive fluorescent probes for SY, which were applied to the fluorescence sensing of SY in different food samples with satisfactory results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据