期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 219, 期 -, 页码 50-56出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.05.021
关键词
Carbon dots; Fluorescent probe; Free chlorine; Nitrogen; Sulfur
资金
- National Natural Science Foundation of China [21175030, 21327007]
- BAGUI Scholar Program
- project of Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China [CMEMR2013-KA952]
- Scientific Research Project of Guangxi Higher Learning [2013Y8285]
Nitrogen and sulfur co-doped carbon dots (N,S-CDs) emitted strong blue fluorescence in aqueous solution, and it was found that the free chlorine could efficiently quench the fluorescence of the N,S-CDs, which was utilized as a sensitive, low-cost and green fluorescence probe for the detection of free chlorine. Under optimal conditions, a linear relationship between the decreased fluorescence intensity of N,S-CDs and the concentration of free chlorine in the range from 0.01 to 100 mu M was obtained with a detection limit of 5 nM (3 sigma). The proposed method was successfully applied for the determination of free residual chlorine in tap water and swimming pool with quantitative recovery (91-106%). The developed N,S-CDs fluorescence probe provides a new and promising tool for the water quality monitoring in the environmental analysis fields with low cost and excellent performance. (C) 2015 Elsevier B.V. All rights reserved.
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