Enhanced electrochemiluminescence from reduced graphene oxide–CdTe quantum dots for highly selective determination of copper ion. (26th June 2019)

• Record Type: Journal Article
• Authors: Hu, Fang Xin; Wang, Juanli; Chen, Shihong; Rao, Qianghai
• Is Part Of: Luminescence. Volume 34:Number 7(2019)
• Page Start: 666
• Page End: 672
• Publication Date: 2019-06-26
• Subjects: copper ion -- electrochemiluminescence -- RGO–CdTe quantum dots -- sensor; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.3649
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: 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 H2 O2 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.