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Sensors 2014, 14(5), 8926-8939; doi:10.3390/s140508926
Article

Electrochemical Detection of p-Aminophenol by Flexible Devices Based on Multi-Wall Carbon Nanotubes Dispersed in Electrochemically Modified Nafion

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Received: 24 February 2014 / Revised: 12 May 2014 / Accepted: 14 May 2014 / Published: 21 May 2014
(This article belongs to the Section Physical Sensors)
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Abstract

A conducting composite prepared by dispersing multi-walled carbon nanotubes (MWCNTs) into a host matrix consisting of Nafion, electrochemically doped with copper, has been prepared, characterized and used to modify one of the gold electrodes of simply designed electrochemical cells having copier grade transparency sheets as substrates. Electrical measurements performed in deionized water show that the Au/Nafion/Au-MWCNTs–Nafion:Cu cells can be successfully used in order to detect the presence of p-aminophenol (PAP) in water, without the need for any supporting electrolyte. The intensity of the redox peaks arising when PAP is added to deionized water is found to be linearly related to the analyte in the range from 0.2 to 1.6 µM, with a detection limit of 90 nM and a sensitivity of 7 µA·(µM−1)·cm−2.
Keywords: p-aminophenol; electrochemical sensor; Nafion/MWCNTs-modified electrodes p-aminophenol; electrochemical sensor; Nafion/MWCNTs-modified electrodes
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Scandurra, G.; Antonella, A.; Ciofi, C.; Saitta, G.; Lanza, M. Electrochemical Detection of p-Aminophenol by Flexible Devices Based on Multi-Wall Carbon Nanotubes Dispersed in Electrochemically Modified Nafion. Sensors 2014, 14, 8926-8939.

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