Journal
ANALYTICA CHIMICA ACTA
Volume 891, Issue -, Pages 113-119Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2015.05.054
Keywords
Ultra-trace Cu2+; Graphitic carbon nitride; Graphene oxide; Electrochemiluminescence sensing
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Funding
- National Natural Science Foundation of China [51178173, 51202065, 51238002, 51078129]
- Environmental Science Foundation of China Academy of Engineering Physics [HJ2014-3]
- Foundation for Special Talents in China Academy of Engineering Physics [TP201502-3]
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Here for the first time, we present a novel electrochemiluminescence (ECL) sensor based on graphitic carbon nitride/graphene oxide (g-C3N4/GO) hybrid for the ultrasensitive detection of Cu2+, which is a common pollutant in environmental system. The g-C3N4/GO shows stable ECL signal in the presence of the self-produced coreactant from oxygen reduction, and the ECL signal could be effectively quenched by Cu2+, the possible ECL detection mechanism has been proposed in detail. GO can not only significantly enhance the cathodic ECL signal of g-C3N4 (similar to 3.8 times), but also serve as immobilization platform for g-C3N4. After optimization of experimental conditions, the proposed protocol can offer an ultrasensitive, highly selective and recyclable method for the detection of Cu2+ with a low detection limit of 1.0 x 10(-11) M and a wide linear range from 1.0 x 10(-11) to 1.0 x 10(-7) M. Moreover, the practicability of the ECL sensor in real wastewater samples is also tested, showing that the proposed ECL sensor could be a promising alternative method for the emergency and routine monitoring of Cu2+ in real sample. (C) 2015 Elsevier B.V. All rights reserved.
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