还原氧化石墨烯-碲化镉量子点增强的电致化学发光用于铜离子的高选择性测定。

Enhanced electrochemiluminescence from reduced graphene oxide-CdTe quantum dots for highly selective determination of copper ion.

机构信息

Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou, China.

Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, China.

出版信息

Luminescence. 2019 Nov;34(7):666-672. doi: 10.1002/bio.3649. Epub 2019 Jun 26.

DOI:10.1002/bio.3649

PMID:31243864

Abstract

An electrochemiluminescence (ECL) sensor based on reduced graphene oxide-CdTe quantum dots (RGO-CdTe QDs) composites for detecting copper ion (Cu ) was proposed. The ECL behaviours of the RGO-CdTe QD modified electrode were investigated with H O as the co-reactant. Quantitative detection of Cu was realized as Cu could effectively quench the ECL signal of the RGO-CdTe QDs. A wide linear range of 1.00 × 10 to 1.00 × 10 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 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.

摘要

基于还原氧化石墨烯-碲化镉量子点（RGO-CdTe QDs）复合材料的电化学发光（ECL）传感器被提出用于检测铜离子（Cu ）。研究了以 H O 为共反应物时 RGO-CdTe QD 修饰电极的 ECL 行为。由于 Cu 能够有效地猝灭 RGO-CdTe QDs 的 ECL 信号，因此实现了 Cu 的定量检测。在优化条件下，获得了 1.00×10 到 1.00×10 的宽线性范围（R=0.9953），检测限（S/N=3）低至 3.33×10 。该传感器还表现出良好的稳定性和选择性，可用于检测铜离子。最后，还使用河水评估了所提出传感器的分析应用。