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

Sensors

Graziella Scandurra¹  Arena Antonella¹  Carmine Ciofi¹  Gaetano Saitta¹ 

[1] Department of Electronic Engineering, Chemistry and Industrial Engineering, Messina University, Messina 98166, Italy; E-Mails:

关键词: p-aminophenol;    electrochemical sensor;    Nafion/MWCNTs-modified electrodes;   

DOI  :  10.3390/s140508926

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.