DocumentCode :
272381
Title :
Studies on the electrochemical properties of nickel phtalocyanine for impedimetric detection of environment pollutants: hydroquinone and bisphenol A
Author :
Zahou, Imène ; Mlika, Rym ; BenChaabane, Rafik ; Jaffrezic-Renault, Nicole ; BenOuada, Hafedh
Author_Institution :
Lab. d´Interfaces et Mater. Avances (LIMA), Fac. des Sci. de Monastir, Monastir, Tunisia
Volume :
9
Issue :
3
fYear :
2015
fDate :
5 2015
Firstpage :
315
Lastpage :
321
Abstract :
A self-assembled film of nickel phtalocyanine (NiPc) has been immobilised onto gold (Au) substrate to develop a new impedimetric method for environmental pollutants detection. NiPc/Au electrode was first characterised using contact angle measurements and cyclic voltammetry to investigate the adhesion and the kinetic behaviour of the self-assembled film. Results demonstrated the interaction between Au and benzene group and at the same time showed the formation of a completely covered NiPc layer on the Au surface. In addition, the NiPc film seems to exhibit reversible redox behaviour and is found to act as an electronic conductor which allows rapid electron transfer. The electrochemical impedance spectroscopy spectra of the NiPc/Au electrode, as a function of hydroquinone (HQ) and Bisphenol A (BPA) concentration, reveal that the value of the charge transfer resistance increases with increased concentration. The electrical behaviour of the structure was studied according to an equivalent circuit by fitting the experimental spectra. Moreover, this technique demonstrates that this membrane exhibits a high sensitivity towards the toxic pollutants HQ and BPA. The differences in selectivity are clearly displayed by variations in the membrane resistance (Rm) and in the charge transfer resistance (Rtc) of the interface.
Keywords :
electrochemical impedance spectroscopy; equivalent circuits; nickel compounds; organic compounds; pollution measurement; thin films; voltammetry (chemical analysis); Au; adhesion; bisphenol A; charge transfer resistance; contact angle measurements; cyclic voltammetry; electrochemical impedance spectroscopy; electrochemical properties; electronic conductor; environment pollutants; environmental pollutants detection; equivalent circuit; gold substrate; hydroquinone; impedimetric detection; kinetic behaviour; membrane resistance; nickel phtalocyanine; rapid electron transfer; reversible redox behaviour; self-assembled film; toxic pollutants;
fLanguage :
English
Journal_Title :
Science, Measurement & Technology, IET
Publisher :
iet
ISSN :
1751-8822
Type :
jour
DOI :
10.1049/iet-smt.2014.0027
Filename :
7089376
Link To Document :
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