Studies on the electrochemical properties of nickel phtalocyanine for impedimetric detection of environment pollutants: hydroquinone and bisphenol A

Imene Zahou; Rym Mlika; Rafik Benchaabane; Nicole Jaffrezic-Renault; Hafedh Benouada

doi:10.1049/iet-smt.2014.0027

Studies on the electrochemical properties of nickel phtalocyanine for impedimetric detection of environment pollutants: hydroquinone and bisphenol A

Imene Zahou ^{1, *} Rym Mlika ¹ Rafik Benchaabane ¹ Nicole Jaffrezic-Renault ² Hafedh Benouada ¹

* Corresponding author

1 LIMA - Laboratoire des Interfaces et Matériaux Avancés

2 Interfaces & biosensors - Interfaces & biocapteurs

ISA - Institut des Sciences Analytiques

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 (R-m) and in the charge transfer resistance (R-tc) of the interface.

Keywords : SELF-ASSEMBLED MONOLAYERS GOLD ELECTRODES METALLOPHTHALOCYANINES COMPLEXES ELECTROCATALYTIC OXIDATION COBALT PHTHALOCYANINE LIQUID-CHROMATOGRAPHY HYDROGEN-PEROXIDE PHENOLS CHLOROPHENOLS SENSITIVITY

Document type :

Journal articles

Domain :

Chemical Sciences / Analytical chemistry

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https://hal.archives-ouvertes.fr/hal-01363681
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Submitted on : Sunday, September 11, 2016 - 9:08:58 AM
Last modification on : Wednesday, September 12, 2018 - 10:04:02 AM

Studies on the electrochemical properties of nickel phtalocyanine for impedimetric detection of environment pollutants: hydroquinone and bisphenol A

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Studies on the electrochemical properties of nickel phtalocyanine for impedimetric detection of environment pollutants: hydroquinone and bisphenol A

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