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Current Analytical Chemistry


ISSN (Print): 1573-4110
ISSN (Online): 1875-6727

Research Article

Thermal Exfoliated Graphite/Chitosan Modified Glassy Carbon Electrode for Cu(II) Ion Sensing

Author(s): Nhan T.T. Le, Hoang V. Tran*, Chinh D. Huynh, Cuong D. Nguyen and Toan V. Phi

Volume 18, Issue 7, 2022

Published on: 06 April, 2022

Page: [790 - 797] Pages: 8

DOI: 10.2174/1573411018666220228152040

Price: $65


Aims: Here, we report a simple strategy for the preparation of thermally exfoliated graphite (EG) and its application to modify glassy carbon electrode (GCE) surfaces for electrochemical Cu2+ ion sensing.

Method: The electrochemical Cu2+ sensor was constructed by a layer modification of a glassy carbon electrode (GCE) with exfoliated graphite (EG) and chitosan (CS) as a binder, and CS also supports a large number of -NH2 functional groups for Cu2+ capture.

Result: Due to the creation of a three-dimensional (3D) structure, the EG/CS-coated GCE (EG/CS/GCE) electrode exhibited a higher sensitivity towards Cu2+ detection than that of modification by graphite/chitosan (GP/CS), chitosan (CS) or graphite intercalated compounds (GIC)/chitosan.

Conclusion: The proposed method could detect Cu2+ in the range of 10 μM to 3 mM with a detection limit of 0.5 μM and sensitivity of 43.62 μA mM-1.

Keywords: Exfoliated graphite (EG), chitosan (CS), Cu2+ detection, electrochemical, cyclic voltammetry (CV), square wave voltammetry (SWV).

Graphical Abstract
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