4.7 Article

Green Preparation of Fluorescent Nitrogen-Doped Carbon Quantum Dots for Sensitive Detection of Oxytetracycline in Environmental Samples

期刊

NANOMATERIALS
卷 10, 期 8, 页码 -

出版社

MDPI
DOI: 10.3390/nano10081561

关键词

nitrogen-doped carbon quantum dots; natural biomass; fluorescence; oxytetracycline; detection

资金

  1. National Natural Science Foundation of China [41877491, 51808215, 31672457]
  2. Outstanding Youth Project of Hunan Provincial Department of Education [19B256]
  3. Hunan Provincial Science and Technology Department [2018CT5002, 2018WK4025]
  4. double first-class construction project of Hunan Agricultural University [SYL201802003, YB2018007, CX20190497]

向作者/读者索取更多资源

Nitrogen-doped carbon quantum dots (N-CQDs) with strong fluorescence were prepared by a one-step hydrothermal method using natural biomass waste. Two efficient fluorescent probes were constructed for selective and sensitive detection of oxytetracycline (OTC). The synthesized N-CQDs were characterized by UV-visible absorption spectra, fluorescence spectra, Fourier transform infrared spectroscopy (FT-IR), X-ray photon spectroscopy (XPS), atomic force microscopy (AFM), and high-resolution transmission electron microscopy (HRTEM), which proved that the synthesized N-CQDs surface were functionalized and had stable fluorescence performance. The basis of N-CQDs detection of OTC was discussed, and various reaction conditions were studied. Under optimized conditions, orange peel carbon quantum dots (ON-CQDs) and watermelon peel carbon quantum dots (WN-CQDs) have a good linear relationship with OTC concentrations in the range of 2-100 mu mol L(-1)and 0.25-100 mu mol L-1, respectively. ON-CQDs and WN-CQDs were both successfully applied in detecting the OTC in pretreated tap water, lake water, and soil, with the recovery rate at 91.724-103.206%, and the relative standard deviation was less than 5.35%. The results showed that the proposed N-CQDs proved to be green and simple, greatly reducing the detection time for OTC in the determination environment.

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