Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 244, Issue -, Pages 965-971Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.01.036
Keywords
Carbon nitride nanoparticles; Fluorescent probe; Free chlorine; Tartaric acid; Urea
Funding
- Natural Science Foundation of Fujian Province of China [2012J06005, 2014J01053]
- Education Bureau of Fujian Province of China [JK2011030, JA13195]
- External Foundation of MOE Key Laboratory of Analysis and Detection for Food Safety (Fuzhou University) [FS1307]
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A facile one-pot solvothermal strategy was used to prepare fluorescent carbon nitride nanoparticles (CNNPs) using tartaric acid and urea as carbon and nitrogen sources at relatively low temperatures. The obtained CNNPs were characterized by multiple analytical techniques. The CNNPs with fluorescence (FL) quantum yield up to 17.9% exhibited excellent selectivity and sensitivity of fluorescence quenching for free chlorine. The quenching rate was quick, and the linear response range of free chlorine was from 0 to 30 M. The limit of detection (LOD) was as low as 13 nM, which was much lower than that of the most widely used N,N-diethyl-p-phenylenediamine (DPD) colorimetric method. This sensing system exhibits many advantages, such as short response time (less than 1 min), excellent selectivity, high sensitivity, and wide linear response range. The results show that this method has promising potential applications in the detection of free chlorine in real water samples. (C) 2017 Elsevier B.V. All rights reserved.
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