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Wednesday, July 29, 2020 | History

2 edition of aqueous electrooxidation of pphenol at a glassy carbon electrode. found in the catalog.

aqueous electrooxidation of pphenol at a glassy carbon electrode.

Michael Albert Gattrell

aqueous electrooxidation of pphenol at a glassy carbon electrode.

by Michael Albert Gattrell

  • 174 Want to read
  • 12 Currently reading

Published .
Written in English


The Physical Object
Pagination145 leaves
Number of Pages145
ID Numbers
Open LibraryOL19539923M

  The glassy carbon electrode was widely used for decades for electrochemical determination of various compounds. The GCE surface is easily modified for a more selective and sensitive analysis. For the determination of BPA from real samples a lot of modified GCEs were fabricated (see Table I). The insect repellent di-propyl pyridine-2,5-dicarboxylate (MGK ) may be reduced in aprotic acetonitrile at glassy carbon, platinum and hanging mercury drop (HMDE) electrodes to give an analytically ideal, reversible one-electron process with a reversible potential (E°′ value) of – mV Ag/Ag. In contrast, the.

glassy carbon electrode has been developed using dithiooxamide as modifier in non-aqueous media. The surface modification of glassy carbon electrode has been performed within the mV and + mV potential range with 20 cycles using 1 mM dithioxamide solution in acetonitrile. However, the modification of quercetin to both bare glassy carbon and. Tahar NB, Savall A () Electropolymerization of phenol on a vitreous carbon electrode in alkaline aqueous solution at different temperatures. Electrochim Acta – doi: /cta

Electrochemical oxidation of quercetin, as an important biological molecule, has been studied in non-aqueous media using cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. To investigate the electrochemical properties of quercetin, an important flavonoid derivative, on a different surface, a new glassy carbon electrode has been developed using. Cyclic voltammograms were carried out to track the process of phenol electro-oxidation on GCE, understand the course and further guide the use in dealing with waste water. The effect of supporting electrolyte, phenol concentration, and scan rate were all tested. The results show that phenol oxidation contains several steps, and the first step is a mass transport process, while the following.


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Aqueous electrooxidation of pphenol at a glassy carbon electrode by Michael Albert Gattrell Download PDF EPUB FB2

The electrooxidation of phenol is of interest as a model compound for the treatment of aqueous organic wastes. The effect of voltage, concentration and temperature on the electrochemical oxidation of acidic dilute aqueous solutions of phenol was studied.

Electrolysis was carried out by recirculating phenol solutions through a flow‐by electrochemical reactor employing a reticulated glassy carbon by: The effect of voltage, concentration and temperature on the electrochemical oxidation of acidic dilute aqueous solutions of phenol was studied.

Electrolysis was carried out by recirculating phenol solutions through a flow‐by electrochemical reactor employing a reticulated glassy carbon by: In mesityl oxide without any added phenol there was no significant film formation but glassy carbon electrode deactivated.

On platinum electrode, a polymer layer with high porosity could be obtained in solution of phenol prepared with mesityl oxide. On glassy carbon electrode, the electrodeposition resulted in a compact : László Kiss, Ferenc Kovács, Heng Li, András Kiss, Sándor Kunsági-Máté.

Download Citation | On Nov 1,Kira V. Alekseenko and others published THE STUDY OF PHENOL ELECTROOXIDATION IN ALKALINE SOLUTION ON GLASSY CARBON ELECTRODE |. For the phenol electro-oxidation at glassy carbon electrodes and at a concentration below 2 mM a multi-electron oxidation (ca.

4 electrons) occurs in the presence of microwave radiation. For the electro-oxidation of the more hydrophobic triclosan only the one-electron oxidation by: It was proved that in an alkaline solution phenol is present in form of phenolate-ion, adsorbing on the surface of glassy carbon electrode, and oxidized to hydroquinone with transfer of two electrons.

For example, work has been done with electrodes made of titanium[2,3], platinum[4], glassy carbon[5], graphite [6], and, most recently, boron-doped diamond (BDD)[7,8]. Researchers have shown that. Electrochemical oxidation of some p-substituted phenols (p-nitrophenol, p-hydroxybenzaldehyde, phenol, p-cresol, and p-methoxyphenol) with electron-donating and -withdrawing substituents was studied to reveal the relationship between the structure and the electrochemical reactivity of p-substituted phenols using a boron-doped diamond electrode by voltammetry and bulk electrolysis.

1. Introduction. Carbon materials are widely used and receive increasing interest as electrodes, electrocatalysts and/or electrocatalyst supports in different electrochemical applications, such as industrial synthesis (Al, Cl 2 –NaOH, organics), electro-oxidation and -adsorption of pollutants, analysis and detection in (bio)sensors, medicine (neural communication, enzyme immunoassays.

The cumene hydroperoxide oxidation on glassy carbon electrodes involves an irreversible one-electron transfer to peroxide and phenoxy radicals, being the main end products hydroquinone and acetone. Phenol oxidation in aqueous solutions was carried out in a pH range of using cyclic votlammetry (CV) and differential pulse voltammetry (DPV) studies on a glassy carbon electrode.

Peak. Clean electrode surfaces can be achieved during the electrolysis of otherwise passivating species in aqueous and other solutions by means of surface ablation using a Hz pulsed Nd:YAG nm laser.

This ability to remove passivating electrolytically generated layers on glassy carbon and platinum electrodes is shown first by an investigation of the stripping peaks formed from the.

Here, a novel method, Cu−Zn/GO modified glassy carbon electrode (GCE) was constructed and used for sensitive determination of BPA. The morphological, electrical and structural analysis of the newly synthesized materials were studied by means of SEM, XPS and EIS.

Ferenc Kovács's 6 research works with 8 citations and reads, including: Electrochemical polymerization of phenol on platinum and glassy carbon electrodes in mesityl oxide. Untreated industrial effluents invariably contain large amounts of heavy metals and organics. This paper reports the electrochemical oxidation of synthetic water containing ppm of phenol.

Studies have been carried out in a compartmentalized cell using platinum (cathode) and graphite (anode). Electrolysis has been done for 40 h at constant applied potential of 5 V in different electrolytes.

In this contribution, a very simple and reliable strategy based on the easy modification of a glassy carbon electrode (GCE) by pre-electrolyzing GCE in ammonium carbamate aqueous solution was employed for the simultaneous determination of hydroquinone (HQ) and catechol (CC).

Compared with bare GCE, the incor. Modified Carbon Electrodes for Microscale Electrochemistry. Journal of Chemical Education75 (6), DOI: /edp Joseph.

Wang and Bassam A. Freiha. Extractive preconcentration of organic compounds at carbon paste electrodes. We report on the electro-oxidation and amperometric detection of phenol and chlorinated phenols, the latter coupled with flow injection analysis (FIA) and high performance liquid chromatography (HPLC), using boron-doped microcrystalline and nanocrystalline diamond thin-film electrodes.

The low background current, good response without extensive pretreatment, and low. Clean electrode surfaces can be achieved during the electrolysis of otherwise passivating species in aqueous and other solutions by means of surface ablation using a 10 Hz pulsed Nd∶YAG nm laser.

This ability to remove passivating electrolytically generated layers on a glassy carbon electrode. For the phenol electro-oxidation at glassy carbon electrodes and at a concentration below 2 mM a multi-electron oxidation (ca.

4 electrons) occurs in the presence of microwave radiation. For the electro-oxidation of the more hydrophobic triclosan only the one-electron oxidation occurs. Electro-Oxidation and Detection of Phenol on Metals Modified Carbon Paste Electrodes Maallah R 1, Hafid A2, Barakat A 3 and Chtaini A1* 1Equipe of Molecular Electrochemistry and Inorganic Materials, Faculty of Science and Technology of Beni Mellal, Sultan Moulay Slimane University, Morocco 2Organic Chemistry and Analytical Laboratory, Faculty of Sciences and Techniques Beni Mellal, University.

Cyclic voltammetric experiments were performed in a conventional three-electrode cell using glassy carbon (GC) disk electrode as working electrode (with surface area ca. cm 2). Auxiliary electrode was a platinum wire and reference electrode was a saturated Ag/AgCl electrode. Phenol and its three chloro derivatives were electrooxidized on glassy carbon electrode under optimized conditions of concentration, number of repeated scans, scan rate, and pH of the medium.

Next, the aqueous solutions of the phenols were degraded under controlled dose of gamma (γ) radiations in the range of 1–5 kGy.

The post γ-irradiated phenols were investigated by cyclic .