期刊
ROYAL SOCIETY OPEN SCIENCE
卷 5, 期 5, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsos.172149
关键词
nitrite detection; carbon dots; fluorescence quenching
资金
- National Natural Science Foundation of China [61575150, 61377092]
- Fundamental Research Funds for the Central Universities [WUT: 2017II46GX]
A fluorescent carbon dots probe for the detection of aqueous nitrite was fabricated by a one-pot hydrothermal method, and the transmission electron microscope, Xray diffractometer, UV-Vis absorption spectrometer and fluorescence spectrophotometer were used to study the property of carbon dots. The fluorescent property of carbon dots influenced by the concentration of aqueous nitrite was studied. The interaction between the electron-donating functional groups and the electron-accepting nitrous acid could account for the quenching effect on carbon dots by adding aqueous nitrite. The products of the hydrolysis of aqueous nitrite performed a stronger quenching effect at lower pH. The relationship between the relative fluorescence intensity of carbon dots and the concentration of nitrite was described by the Stern-Volmer equation (I-0/I - 1 = 0.046[Q]) with a fine linearity (R-2 = 0.99). The carbon dots-based probe provides a convenient method for the detection of nitrite concentration.
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