期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 411, 期 11, 页码 2291-2300出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-019-01670-z
关键词
Portable sensing gadget; Fluorescence analysis; Carbon dots; 2,4,6-Trinitrophenol detection
资金
- National Natural Science Foundation of China [21535006, 61801400, 61703348]
- Fundamental Research Funds for the Central Universities [XDJK2018C021]
- Japan Society for the Promotion of Science KAKENHI [JP18F18392]
An optical sensing gadget using fluorescence of carbon dots (CDs) was developed to realize the in-field detection of 2,4,6-trinitrophenol (TNP) in tap water and lake water samples. Fluorescent CDs were prepared through a one-step hydrothermal synthetic route. The fluorescence spectra demonstrated that the CDs could specifically discriminate TNP from other nitroaromatic explosives in an aqueous medium. The fluorescence of the CDs was quenched linearly with the concentration of TNP in the range from 1 to 100 mu M, with a detection limit of 0.48 mu M (3 sigma/k). The detection mechanism was ascribed to the synergistic effect of the inner filter effect and electron transfer. In addition, a portable sensing gadget based on a high-precision RGB color sensor and a micro control unit was developed. With use of the sensing gadget and the CDs, TNP detection in tap water and lake water samples was realized. Importantly, the portable sensing gadget combined with highly stable, low-toxicity, and sensitive CDs might have great potential for application in extensive in-field sensing situations.
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