Electrochemical detection of p-aminophenol by flexible devices based on multi-wall carbon nanotubes dispersed in electrochemically modified Nafion.
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).
Department of Electronic Engineering, Chemistry and Industrial Engineering, Messina University, Messina 98166, Italy. gscandurra@unime.it.
Graziella
G
Scandurra
Department of Electronic Engineering, Chemistry and Industrial Engineering, Messina University, Messina 98166, Italy. arenaa@unime.it.
Arena
A
Antonella
Department of Electronic Engineering, Chemistry and Industrial Engineering, Messina University, Messina 98166, Italy. cciofi@unime.it.
Carmine
C
Ciofi
Department of Electronic Engineering, Chemistry and Industrial Engineering, Messina University, Messina 98166, Italy. saitta@unime.it.
Gaetano
G
Saitta
CNR, Institute for Chemical-Physics Processes, Messina Section, Messina 98166, Italy. lanza@its.me.cnr.it.
Maurizio
M
Lanza
D000627:Aminophenols / Q000032:analysis*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D005465:Fluorocarbon Polymers / Q000737:chemistry*; D057230:Limit of Detection; D037742:Nanotubes, Carbon / Q000737:chemistry
D000627:Aminophenols; D005465:Fluorocarbon Polymers; D037742:Nanotubes, Carbon; C040402:perfluorosulfonic acid; C026729:4-aminophenol