Electro-oxidation of chlorophenols on poly(3,4-ethylenedioxythiophene)-poly(styrene sulphonate) composite electrode

Pigani, Laura; Musiani, Marco; Pîrvu, Cristian; Terzi, Fabio; Zanardi, Chiara; Seeber, Renato

doi:10.1016/j.electacta.2006.07.055

Cited by 39 publications

(20 citation statements)

References 26 publications

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“…At higher concentrations, all the three compounds exhibit passivation effect in NaOH medium. In order to overcome this problem, earlier researchers have evaluated the influence of different electrode materials [6,7] and modified electrodes [17][18][19][20][21] without changing the electrolyte medium. In this study, the electrochemical behavior of these compounds was further investigated in micellar and microemulsion medium on the same GC electrode.…”

Section: Voltammetric Studiesmentioning

confidence: 99%

“…A wide variety of electrodes such as platinum [15,16] modified platinum [17], gold [18], modified GC [19], tindioxide-coated titanium electrode [20], and modified aerosol carbon electrode [21] have been used for oxidative removal of chlorophenols. Chlorophenols usually undergo oxidative polymerization on many electrodes even at low concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

2009

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The voltammetric behavior of 2, 4-dichlorophenol (DCP), 2, 4, 6-trichlorophenol (TCP) and pentachlorophenol (PCP) in aqueous sodium hydroxide (NaOH), aqueous NaOH-sodium dodecylsulphate (SDS) micellar solution and SDS/n-hexane/n-butanol/water microemulsion on glassy carbon electrode (GC) is reported. In aqueous alkaline medium, the electrode fouling is significant. Among the three media, the electrode fouling is the minimum in aqueous microemulsion. The fouling effect also depends on the nature of the phenolic compound. DCP exhibits the maximum fouling effect, and PCP exhibits the minimum fouling effect. During oxidation of the TCP in the microemulsion, quinone-hydroquinone-like redox couples were formed on the electrode surface. Reproducible voltammetric responses without electrode fouling could be obtained for all the three phenolic compounds up to 20 mM concentrations in microemulsion. In the galvanostatic oxidation in NaOH media, DCP and TCP led to formation of polymeric films on the glassy carbon surface. The Average molecular weight of the polymer obtained is in the range of 7,500-9,500. Even 2.5% by weight of chlorophenols could be oxidized under galvanostatic conditions in microemulsions without significant fouling.

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Section: Voltammetric Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

2009

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“…Electrochemical oxidation of phenols and chlorophenols [11] and the use of electrochemical sensors as detectors in flow injection analysis [12] produced enhanced selectivity, sensitivity, and reproducibility of determinations. Amperometric methods mainly use electrochemical sensors and biosensors as detectors in FIA.…”

Section: Isrn Analytical Chemistrymentioning

confidence: 99%

“…However, the high cost, the problem of immobilization process, low stability, and short operating time limit their practical application. Thus, modification of bare electrodes with nonbiological materials, such as conducting polymers, is an alternative to prevent electrode surface fouling [11,23]. Poly (3,4-ethylenedioxythiophene), PEDOT, which is a relatively new and well-known conjugated polymer, has received relatively high attention because of its high electrical conductivity and excellent environmental stability.…”

Section: Isrn Analytical Chemistrymentioning

confidence: 99%

Determination of Phenol and Chlorophenols at Single-Wall Carbon Nanotubes/Poly(3,4-ethylenedioxythiophene) Modified Glassy Carbon Electrode Using Flow Injection Amperometry

Negash

Alemu

Tessema

2014

ISRN Analytical Chemistry

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Phenol and chlorophenols were investigated using single-wall carbon nanotubes (SWCNT) and poly(3,4-ethylenedioxythiophene) (PEDOT) composite modified glassy carbon electrode (SWCNT/PEDOT/GCE) as a detector in flow injection system. Optimization of experimental variables such as the detection potential, flow rate, and pH of the carrier solution (0.1 M sodium acetate) for the determination of phenol (P), 4-chlorophenol (CP), 2,4-dichlorophenol (DCP), 2,4,6-trichlorophenol (TCP), and pentachlorophenol (PCP) were performed. Under these conditions, analytical parameters were calculated from the calibration curve of measured amperometric responses as a function of concentrations of phenol and chlorophenols. The designed electrode exhibited very good analytical performance. The designed electrode was tested with 20 repetitive injections of each analyte and showed good operational stability. The analytical performance of the SWCNT/PEDOT/GCE electrode under flow through conditions was tested and was found to be impressive. The electrode showed a wider dynamic range for the detection of phenol and chlorophenols with low limits of detection compared with other enzymatic and nonenzymatic sensors. These results suggest that the method is quite useful for the analysis and monitoring of phenols and chlorophenols.

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“…p-Benzoquinone (p-BQ), 2-Chlorophenol (2-Cph), and Phenol were classified as a dangerous chemicals by the Environmental Protection Agency [2]. There are many commercial uses for p-BQ, phenol, and 2-Cph such as in polymer industries, dyes, cellulose, pesticides, toners, and herbicides [1,3,4].…”

Section: Introductionmentioning

confidence: 99%

Enhanced performance based on a hybrid cathode backing layer using a biomass derived activated carbon framework for methanol fuel cells

Balakrishnan

İnal

Cooksey

et al. 2017

Electrochimica Acta

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Nano-diamond composite electrode was prepared and used as anode for anodic oxidation process for organic chemicals. Electrochemical techniques such as impedance and cyclic voltammetry have been used to characterize the diamond composite electrode properties.The oxidation power of the electrode was 0.8 V vs. Ag/AgCl, the charge transfer rate was 12.1 Ohm, and the double layer capacitance was less than 1 µF. The anodic oxidation behavior of p-benzoquinone, 2-chlorophenol, and phenol over diamond composite electrode were investigated by cyclic voltammetry in 0.1 M H2SO4 (pH 3) solution and 0.25 M Na2SO4 (pH 6.8) solution. Results marked that the electro-oxidation of pbenzoquinone was more active than phenol and 2-chlorophenol in the both solutions. Theperformance of the diamond composite electrode during incineration of 200 mg/L pbenzoquinone, 2-chlorophenol, phenol were investigated in an aqueous solution of pH 3 and pH 6.8 with 0.25 M Na2SO4 as the supporting electrolyte and applied current density of 40 mA/cm 2 . Results showed that the degradation rate of benzoquinone was faster than 2-chlorophenol and phenol in both different pH solutions. Moreover, the benzoquinone degradation rate was enhanced at high pH solution, on the contrary of that of 2-chlorophenol and phenol were clearly favored in acid medium.

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Electro-oxidation of chlorophenols on poly(3,4-ethylenedioxythiophene)-poly(styrene sulphonate) composite electrode

Cited by 39 publications

References 26 publications

Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

Determination of Phenol and Chlorophenols at Single-Wall Carbon Nanotubes/Poly(3,4-ethylenedioxythiophene) Modified Glassy Carbon Electrode Using Flow Injection Amperometry

Enhanced performance based on a hybrid cathode backing layer using a biomass derived activated carbon framework for methanol fuel cells

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