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Sensors 2017, 17(10), 2198; https://doi.org/10.3390/s17102198

Copper Oxide Chitosan Nanocomposite: Characterization and Application in Non-Enzymatic Hydrogen Peroxide Sensing

Department of Engineering, Messina University, Messina 98166, Italy
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Received: 8 August 2017 / Revised: 16 September 2017 / Accepted: 22 September 2017 / Published: 24 September 2017
(This article belongs to the Section Chemical Sensors)
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Abstract

Electrochemical dissolution of metallic copper into slightly acidic aqueous solutions of chitosan yields a clear and stable dispersion of Copper Oxide nanoparticles into the organic polymer host. The electrochemically synthesized chitosan:CuOx nanocomposite is characterized by means of spectrophotometry, frequency domain electrical measurements and morphological analysis. Solid state electrochemical cells having pure chitosan as the electrolyte and using chitosan:CuOx as the electrode, are developed and characterized by means of electrical measurements performed in the ±1 V voltage window. The current-voltage loops of the cells, measured in deionized water, are found to reversibly change in response to hydrogen peroxide added to the water in 0.2 μM subsequent steps. Such changes, clearly distinguishable from changes recorded in response to other analytes, can be exploited in order to develop a hydrogen peroxide sensor able to work without the need for any supporting electrolyte. View Full-Text
Keywords: electrochemical sensor; chitosan; modified electrodes electrochemical sensor; chitosan; modified electrodes
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Arena, A.; Scandurra, G.; Ciofi, C. Copper Oxide Chitosan Nanocomposite: Characterization and Application in Non-Enzymatic Hydrogen Peroxide Sensing. Sensors 2017, 17, 2198.

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