Electrochemical detection of Cu^{2 +} using graphene-SnS nanocomposite modified electrode

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• 作者：Jinhua Lu ; ^{lujinhua@nwpu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Xu Zhang ; Ningkun Liu ; Xinmeng Zhang ; Zhiyuan Yu ; Tao Duan
• 关键词：Tin monosulfide ; Graphene ; Electrochemistry ; Copper ion ; Nanocomposites
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2016
• 出版时间：15 May 2016
• 年：2016
• 卷：769
• 期：Complete
• 页码：21-27
• 全文大小：1118 K

文摘

In this paper, an electrochemical copper ion (Cu^2 +) sensor was constructed based on a glass carbon electrode (GCE) modified with SnS nanosheets supported on graphene (Gr–SnS). The electrochemical behaviors towards Cu^2 + were investigated by cyclic voltammetry and linear sweep voltammetry in 1.0 M acidity KCl solution with the pH at 4.5. After optimizing the proportion of SnS to Gr, the best proportion is 2:1. The electrochemical result shows that Gr–SnS nanocomposite modified electrode exhibits good electrochemical performance towards Cu^2 + and the reduction peak current was proportional to the Cu^2 + concentration in the range from 1.5 to 36.0 μM with a detection limit of 0.02 μM (S/N = 3). Besides, the Cu^2 + sensor showed a good anti-interference performance, high stability and excellent regeneration capability.