The degradation of electrochemically polymerised poly (3-aminophenol) films in sodium hydroxide solutions for the production of microelectrode ensembles

Kennedy, Brendan M.; Cunnane, Vincent J.

doi:10.1016/j.electacta.2007.12.036

Cited by 6 publications

(4 citation statements)

References 27 publications

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“…About 35% and 13% oxidation currents remained after the second and third runs, respectively. The formation of a block layer at the electrode surface passivated the electrode activity [28]. Among these aminophenols, 4AP shows less fouling at SPCE Ã (Fig.…”

Section: Tablementioning

confidence: 99%

Electrochemically pretreated screen-printed carbon electrodes for the simultaneous determination of aminophenol isomers

Wang

Cheng

2011

Journal of Electroanalytical Chemistry

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Section: Tablementioning

confidence: 99%

Electrochemically pretreated screen-printed carbon electrodes for the simultaneous determination of aminophenol isomers

Wang

Cheng

2011

Journal of Electroanalytical Chemistry

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“…1b the current reaches 1 mA at 700 mV) forming molecular phenol, and its partition could explain that the height of the oxidation wave beyond the sixth scan exceeded that of the 1st scan [19]. Furthermore, it was shown by Kennedy and Cunnane [26,27] that, at a scale time of a few minutes, pore ensembles are produced from the degradation of poly(3-aminophenol) films by sodium hydroxide solution (0.01-0.1 mol L -1 ). In the same way, one can assume that the polymer film obtained by electro-oxidation of the phenol can be chemically attacked by the alkaline solution, which would lead the forming of pores.…”

Section: Discussionmentioning

confidence: 90%

“…The polymeric film has been modeled as a transport barrier that impedes diffusion of the permeant to the electrode; the two principal transport mechanisms involve diffusion (i) through the bulk of the film and (ii) inside the pores within the film [20,28]. In the pore mechanism, the current flux for the electrochemical reaction would be forced through the small pore acting effectively as an ultramicroelectrode [26] producing changes in the reversibility of the electrochemical reaction [29]. One can thus assume that for the ferricyanide anion a mechanism involving pore diffusion progressively becomes the dominant transport mechanism as the number of scans increases in films prepared at 85°C.…”

Section: Evaluation Of the Apparent Permeability Of The Polymeric Filmentioning

confidence: 99%

Influence of temperature and applied potential on the permeability of polyphenol films prepared on vitreous carbon in acid and alkaline media

Tahar

Savall

2013

J Appl Electrochem

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The electrochemical polymerization of phenol is known to rapidly produce a thin insulating film at the anode surface. This film generally blocks further polymerization. The objective of this study is to show that, depending on the operating conditions, polymeric films resulting from phenol oxidation present different properties and that certain films can be so porous that they allow the oxidation of phenol to continue. The deposition of polyphenol films with improved permeability could be attractive in the removal of phenol from polluted solutions. Polyphenol films were prepared in aqueous solution on a vitreous carbon anode either by cyclic voltammetry or by electro-oxidation at constant potential. The apparent permeability P (%) of the films prepared by these techniques was evaluated by monitoring changes in the electrode response towards phenol and potassium ferricyanide at 25 and 85°C and as a function of the potential applied during electropolymerization performed either in acidic (1 mol L-1 H 2 SO 4) or in alkaline (1 mol L-1 NaOH) aqueous solution. It was shown that: (1) the polyphenol film electrosynthesized in alkaline medium was more permeable than that prepared in acidic medium, (2) the apparent permeability was higher when the polyphenol film was electrosynthesized with simultaneous oxygen evolution and (3) the use of a high temperature in the polyphenol film preparation, especially in the presence of a concomitant oxygen evolution, significantly enhanced its apparent permeability (P C 100 %). These results are interpreted in terms of a mixed-transport mechanism involving both pore and membrane diffusion. The effect of the permeability of the polymeric film on the removal of phenol from aqueous solution by electropolymerization is discussed.

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“…From the comparison of the curves, it is easily seen that the monomer started to oxidize at about 0.40 V and then the peak current was decreased to almost the background level in the subsequent scans. This situation is typical for electrochemically grown non-electroactive polymeric films and can be explained by passivation of the electrode surface on repeated cycling [24].…”

Section: Electrochemical Polymerizationmentioning

confidence: 99%

Poly (3-aminophenol) Film as a Uric Acid-Selective Electrode

Kurşun

Paşahan

Ekinci

et al. 2011

International Journal of Polymeric Materials

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In order to prepare uric acid-selective polymeric membrane in the presence of electroactive (ascorbic acid, cysteine, oxalic acid) and nonelectroactive (lactose, sucrose and urea) substances, poly (3-aminophenol) films were prepared by means of electropolymerization on Pt electrodes. By systematically investigating the influence of polymerization conditions on sensor performance of the poly (3-aminophenol) film, the optimal parameters were determined. The voltammetric results showed that polymeric films obtained at the optimized conditions were allowed penetration of large amounts of uric acid (UA) while rejecting ascorbic acid, cysteine and oxalic acid in PBS. Therefore, it has been claimed that the polymeric films could be used as uric acid-selective membrane.

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The degradation of electrochemically polymerised poly (3-aminophenol) films in sodium hydroxide solutions for the production of microelectrode ensembles

Cited by 6 publications

References 27 publications

Electrochemically pretreated screen-printed carbon electrodes for the simultaneous determination of aminophenol isomers

Electrochemically pretreated screen-printed carbon electrodes for the simultaneous determination of aminophenol isomers

Influence of temperature and applied potential on the permeability of polyphenol films prepared on vitreous carbon in acid and alkaline media

Poly (3-aminophenol) Film as a Uric Acid-Selective Electrode

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