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Enhanced electrochemiluminescence from reduced graphene oxide–CdTe quantum dots for highly selective determination of copper ion
Author(s) -
Hu Fang Xin,
Wang Juanli,
Chen Shihong,
Rao Qianghai
Publication year - 2019
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3649
Subject(s) - electrochemiluminescence , graphene , copper , detection limit , quantum dot , cadmium telluride photovoltaics , materials science , oxide , copper oxide , ion , electrode , selectivity , linear range , analytical chemistry (journal) , inorganic chemistry , optoelectronics , nanotechnology , chemistry , chromatography , biochemistry , organic chemistry , metallurgy , catalysis
An electrochemiluminescence (ECL) sensor based on reduced graphene oxide–CdTe quantum dots (RGO–CdTe QDs) composites for detecting copper ion (Cu 2+ ) was proposed. The ECL behaviours of the RGO–CdTe QD modified electrode were investigated with H 2 O 2 as the co‐reactant. Quantitative detection of Cu 2+ was realized as Cu 2+ could effectively quench the ECL signal of the RGO–CdTe QDs. A wide linear range of 1.00 × 10 −14 to 1.00 × 10 −4 M ( R = 0.9953) was obtained under optimized conditions, and a detection limit (S/ N = 3) was achieved of as low as 3.33 × 10 −15 M. The proposed sensor also exhibited good stability and selectivity for the detection of copper ions. Finally, the analytical application of the proposed sensor was also evaluated using river water.