Highly sensitive detection of Pb2+ and Cu2+ based on ZIF-67/MWCNT/ Nafion-modified glassy carbon electrode

被引:53
|
作者
Zhang, Yueying [1 ]
Yu, Hao [1 ]
Liu, Tong [1 ]
Li, Weijia [1 ]
Hao, Xidong [1 ]
Lu, Qi [1 ]
Liang, Xishuang [1 ]
Liu, Fengmin [1 ]
Liu, Fangmeng [1 ]
Wang, Chenguang [1 ]
Yang, Chunhua [2 ]
Zhu, Hongqiu [2 ]
Lu, Geyu [1 ]
机构
[1] Jilin Univ, State Key Lab Integrated Optoelect, Key Lab Gas Sensors, Coll Elect Sci & Engn, 2699 Qianjin St, Changchun 130012, Peoples R China
[2] Cent South Univ, Sch Informat Sci & Engn, Changsha 410083, Peoples R China
基金
国家重点研发计划;
关键词
Multiphase modification layer; Electrochemical sensor; Heavy metal ion detection; GCE; Voltammetry; METAL-ORGANIC FRAMEWORKS; ELECTROCHEMICAL DETERMINATION; EFFICIENT REMOVAL; HEAVY-METALS; NANOCOMPOSITE; CD(II); PB(II); CU(II); WATER; FABRICATION;
D O I
10.1016/j.aca.2020.05.023
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A series of different facile modification layers (MLs) was designed to gradually increase the electrochemical sensing performance of glassy carbon electrode (GCE) for simultaneously detecting Pb2+ and Cu2+. ML designs were mainly a different combination of ZIF-67, MWCNT and Nafion, and their different electrochemical sensing performances were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), square wave stripping voltammetry (SWSV) and chronocoulometry. The fabricated sensor, which modified with ZIF-67/MWCNT and Nafion layer, exhibited the biggest response peak current to Pb2+ and Cu2+. In addition, it displayed a wide linear detection range of 1.38 nM-5 mu M for Pb2+ and 1.26 nM-5 mu M for Cu2+, a detection accuracy of about 1 nM for both Pb2+ and Cu2+, and an excellent stability for both Pb2+ and Cu2+. We also analyzed the real water sample taken from Changchun's Sanjia Lake and Yan Lake. We believe this ML design provides instruction for building highperformance electrochemical sensing systems. (C) 2020 Elsevier B.V. All rights reserved.
引用
收藏
页码:166 / 175
页数:10
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