文献类型：期刊文献

英文题名：Fabrication of an effective electrochemical platform based on graphene and AuNPs for high sensitive detection of trace Cu2+

作者：Wang, Sen;Wang, Ying;Zhou, Lihui[1];Li, Jinxia;Wang, Shaolei;Liu, Honglai

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2014

卷号：132

起止页码：7

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20141717618001);WOS:【SCI-EXPANDED(收录号:WOS:000337209600002)】；

基金：This work is supported by the National Basic Research Program of China (2013CB733501), the National Natural Science Foundation of China (No. 91334203, 21305046), the 111 Project of China (No. B08021), the Fundamental Research Funds for the Central Universities of China, and the China Postdoctoral Science Foundation (No. 2013M531137).

语种：英文

外文关键词：Graphene; AuNPs; Electrochemical sensor; Anodic stripping voltammetry; Cu2+

摘要：An electrochemical sensor based on graphene and gold nanoparticles has been developed for the detection of trace Cu2+ with the anodic stripping voltammetry analysis. The Au-GR/GCE electrode was constructed by the electrophoretic deposition and electrochemical reduction of graphene oxide on GCE electrode, followed by the electrochemical deposition of AuNPs on the GR/GCE electrode. The morphology, structure and electrochemical performance of chemically modified electrodes are characterized by SEM, AFM, cyclic voltammetry and Electrochemical Impedance Spectroscopy. Differential pulse voltammetry was employed for evaluating detection of trace Cu2+ through the accumulation process. Under the optimum experimental conditions, the Au-GR/GCE electrode exhibited excellent stripping response of Cu2+ and the stripping peak currents linearly increased with the increasing concentration of Cu2+. The limit of detection was estimated to be 0.028 nM (S/N = 3). (C) 2014 Elsevier Ltd. All rights reserved.