title: Graphene oxide amplified electrochemiluminescence of graphitic carbon nitride and its application in ultrasensitive sensing for Cu(2+).
abstract: 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 Cu(2+), 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 Cu(2+), the possible ECL detection mechanism has been proposed in detail. GO can not only significantly enhance the cathodic ECL signal of g-C3N4 (∼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 Cu(2+) with a low detection limit of 1.0 × 10(-11) M and a wide linear range from 1.0 × 10(-11) to 1.0 × 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 Cu(2+) in real sample.
authors.affiliation: Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China.
authors.forename: Binyuan
authors.initials: B
authors.lastname: Xia
authors.affiliation: Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China.
authors.forename: Mingfu
authors.initials: M
authors.lastname: Chu
authors.affiliation: Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China.
authors.forename: Shaofei
authors.initials: S
authors.lastname: Wang
authors.affiliation: Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China.
authors.forename: Wanqing
authors.initials: W
authors.lastname: Wang
authors.affiliation: Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China. Electronic address: yangshanli@caep.cn.
authors.forename: Shanli
authors.initials: S
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, PR China.
authors.forename: Chengbin
authors.initials: C
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, PR China.
authors.forename: Shenglian
authors.initials: S
authors.lastname: Luo
mesh_terms: D002413:Cations, Divalent / Q000032:analysis; D003300:Copper / Q000032:analysis*; D055664:Electrochemical Techniques / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D009570:Nitriles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D062065:Wastewater / Q000032:analysis*
chemical_list: D002413:Cations, Divalent; D003300:Copper; D006108:Graphite; D009570:Nitriles; D010087:Oxides; D062065:Wastewater; C011206:cyanogen
keywords: Electrochemiluminescence sensing; Graphene oxide; Graphitic carbon nitride; Ultra-trace Cu(2+)