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Nitrogen Doped Carbon Quantum Dots-enhanced Chemiluminescence Method for the Determination of Mn2+

Abstract

Nitrogen doped carbon quantum dots (NCQDs) was synthesized via a ultrasonic method with ascorbic acid as carbon sources and ammonia as nitrogen sources. The synthesized NCQDs could significantly enhance the chemiluminescence (CL) reaction between luminol with KMnO4 in an alkaline condition based on its catalysis. The increased CL intensity also depended on the synthetic temperature and time of NCQDs. The trace amount of Mn2+ could cause a visible restraining the CL intensity of the NCQDs-KMnO4-luminol system because the form of the complexes between Mn2+ with some groups such as NH-, CH2- in the surface of NCQDs, which resulted in the aggregation of NCQDs and scavenging of O2•– free radicals and then the catalytic capacity reduction of NCQDs. Under the optimum conditions, the decrease CL intensity was proportional to the concentration of Mn2+ in the range of 0.3 to 50.0 μ. The detection limit (3) was 43.0 nM. The feasibility of the method was also demonstrated for determining Mn2+ concentration in water samples.

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Publication details

The article was received on 05 Dec 2017, accepted on 04 Jan 2018 and first published on 05 Jan 2018


Article type: Paper
DOI: 10.1039/C7AY02806G
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Nitrogen Doped Carbon Quantum Dots-enhanced Chemiluminescence Method for the Determination of Mn2+

    J. Zhang, X. Chen, Y. Li, S. Han, Y. Du and H. Liu, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C7AY02806G

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