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Thermal Exfoliated Graphite/Chitosan Modified Glassy Carbon Electrode for Cu(II) Ion Sensing
- Source :
- Current Analytical Chemistry; 2022, Vol. 18 Issue: 7 p790-797, 8p
- Publication Year :
- 2022
-
Abstract
- 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 Cu<superscript>2+</superscript> ion sensing. Method: The electrochemical Cu<superscript>2+</superscript> 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 -NH<subscript>2</subscript> functional groups for Cu<superscript>2+</superscript> 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 Cu<superscript>2+</superscript> detection than that of modification by graphite/chitosan (GP/CS), chitosan (CS) or graphite intercalated compounds (GIC)/chitosan. Conclusion: The proposed method could detect Cu<superscript>2+</superscript> in the range of 10 μM to 3 mM with a detection limit of 0.5 μM and sensitivity of 43.62 μA mM<superscript>-1</superscript>.
Details
- Language :
- English
- ISSN :
- 15734110
- Volume :
- 18
- Issue :
- 7
- Database :
- Supplemental Index
- Journal :
- Current Analytical Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs61001807
- Full Text :
- https://doi.org/10.2174/1573411018666220228152040