期刊
MICROCHIMICA ACTA
卷 185, 期 5, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-018-2781-y
关键词
Luminescence; Nitrogen and sulfur co-doped carbon dots; Carbon nanoparticles; Aggregation-enhanced fluorescence; AIEE; Mercury ions
资金
- Provincial Nature Science Foundation of Heilongjiang [E2016039]
A fluorescent probe is presented for sensitive determination of Hg(II). It is based on aggregation induced enhancement effect (AIEE) of carbon dots co-doped with nitrogen and sulfur (N,S-CDs). The N, S-CDs were prepared by a one-pot microwave-assisted method using glycerol as the reaction solvent, and cystine as the source for C, N and S. The resulting CDs are well soluble in water and have a turn-on fluorescence response to Hg(II). The incubation time and ratio of raw materials were optimized. Fluorescence, best measured at excitation/emission wavelengths of 325/385 nm, increases linearly in the 1-75 mu M Hg(II) concentration range, and the detection limit is 0.5 mu M. The method performed successfully when detecting Hg(II) in spiked tap and lake waters, with recoveries between 92 and 106%.
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