Photocatalytically-assisted electrochemical degradation of p-aminophenol in aqueous solutions using zeolite-supported TiO2 catalyst

AbstractThis paper reports the results of an investigation into enhancement of the electrochemical oxidation of p-aminophenol (4-AP) in an aqueous solution with a boron-doped diamond (BDD) electrode, assisted by photocatalysis using a zeolite-supported TiO2 (Z-TiO2) catalyst. The BDD electrode was characterised in 0.1 M Na2SO4-supporting electrolyte and the presence of 4-AP by open-circuit potential behaviour (OCP) and cyclic voltammetry (CV). The electrode behaviour was investigated in the dark and following UV irradiation and in the absence/presence of the Z-TiO2 catalyst. The electro-oxidation process was carried out using chronoamperometry (CA) and multiple-pulsed amperometry (MPA) at the selected potential under potentiostatic conditions. The electrochemical degradation process of 4-AP on the BDD electrode was improved by the application of a pulsed potential, which allowed both in-situ electrochemical cleaning of the electrode and indirect oxidation of 4-AP by oxygen evolution. The application of photocatalysis using Z-TiO2 in the 4-AP electrochemical degradation exhibited an enhanced effect when the anodic potential was set at +1.25 V vs. Ag/AgCl in the water stability region, close to the oxygen evolution potential.

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Electrochemical oxidation and electroanalysis of paracetamol on a boron-doped diamond anode material in aqueous electrolytes

Journal of Electrochemical Science and Engineering ◽

10.5599/jese.932 ◽

2021 ◽

Author(s):

Kouakou Etienne Kouadio ◽

Ollo Kambiré ◽

Konan Sylvestre Koffi ◽

Lassine Ouattara

Keyword(s):

Electrolyte Solution ◽

Current Density ◽

Supporting Electrolyte ◽

Current Intensity ◽

Applied Current ◽

Boron Doped Diamond ◽

Preparative Electrolysis ◽

Applied Current Density ◽

Bdd Electrode ◽

Boron Doped

Electrochemical oxidation of paracetamol on boron-doped diamond (BDD) anode has been studied by cyclic voltammetry and preparative electrolysis. Quantification of paracetamol during electrolysis has been mainly realized by differential pulse voltammetry technique in the Britton-Robinson buffer solutions used as the supporting electrolyte. Various parameters such as current intensity, nature of the supporting electrolyte, temperature, and initial concentration of paracetamol have been investigated. The electrochemical characterization by the outer sphere Fe(III)/Fe(II) redox couple has also been performed, showing the metallic character of BDD electrode. The obtained linear dependency of the oxidation peak current intensity and paracetamol concentration indicates that BDD electrode can be used as an electrochemical sensor for the detection and quantification of paracetamol. The investigation of paracetamol degradation during preparative electrolysis showed that: (i) the degradation rate of paracetamol increases with increase of current intensity applied; (ii) for the initial concentrations of 10, 6 and 1 mM of paracetamol, its oxidation rate reaches 60, 78 and 99 % respectively, after 1 h of electrolysis in 0.3 M H2SO4 (pH 0.6) at applied current density of 70 mA cm-2; (iii) at temperatures of electrolyte solution of 28, 55 and 75 °C, paracetamol oxidation rate reached 85, 92 and 97 % respectively, after 2 h at applied current density of 70 mA cm2. From the investigation of the effect of pH value of electrolyte solution, it appears that oxidation of paracetamol is more favorable in acidic solution at pH 3 than solutions of higher pH values.

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Fabrication and application of boron doped diamond BDD electrode in olive mill wastewater treatment in Jordan

Journal of Water Reuse and Desalination ◽

10.2166/wrd.2016.062 ◽

2016 ◽

Vol 7 (4) ◽

pp. 502-510 ◽

Cited By ~ 9

Author(s):

Inshad Jum'h ◽

Arwa Abdelhay ◽

Hussein Al-Taani ◽

Ahmad Telfah ◽

Mohammad Alnaief ◽

...

Keyword(s):

Supporting Electrolyte ◽

Oxygen Demand ◽

Chemical Vapor ◽

Electrochemical Reactor ◽

Olive Mill Wastewater ◽

Boron Doped Diamond ◽

Ph Variation ◽

Bdd Electrode ◽

Boron Doped ◽

Olive Mill

A boron doped diamond (BDD) electrode was employed in an electrochemical reactor to oxidize the phenolic content of Jordanian olive mill wastewater. The BDD anode was fabricated using hot filament chemical vapor deposition on niobium and the morphology of the BDD electrode was characterized using an atomic force microscope. Then, electrolysis batch runs were carried out at laboratory scale to test the effect of different process parameters, namely, initial chemical oxygen demand (COD) load (72.9, 33.8, and 0.18 g/L), the addition of Na2SO4 as supporting electrolyte, and adding NaCl along with Na2SO4, on the efficiency of the treatment process. The results were reported in terms of COD, color and turbidity removal, and pH variation. The experiments revealed that electrochemical oxidation using BDD significantly reduced the COD by 85% with no supporting electrolytes. It was observed that adding Na2SO4 with NaCl brought the COD removal to higher than 90% after 7 hours of treatment for COD loads of 72.9 and 33.8 g/L, and after 2 hours for a COD load of 0.18 g/L. Likewise, color was completely removed regardless of the initial COD load. The turbidity for samples with 72.9 and 33.8 g/L as COD load reached a minimal value of 2.5 and 1 NTU respectively.

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Copper-Modified Boron-Doped Diamond (Cu/Bdd) Electrode for the Electrochemical Detection of Paclitaxel and Oxaliplatin in Aqueous Solutions

Revista de Chimie ◽

10.37358/rc.19.12.7799 ◽

2020 ◽

Vol 70 (12) ◽

pp. 4605-4610

Keyword(s):

Electrochemical Detection ◽

Supporting Electrolyte ◽

Boron Doped Diamond ◽

Easy Method ◽

Potential Value ◽

Bdd Electrode ◽

Diamond Electrode ◽

Boron Doped ◽

Boron Doped Diamond Electrode ◽

Electrocatalytic Effect

The aim of this study was to obtain a simple and fast modified electrode for the detection of paclitaxel (PCX) and oxaliplatin (OXA) in aqueous solution. PCX and OXA are some of the most used cytostatic drugs suitable to treat various types of cancer, e.g., ovarian, breast, lung, cervical, pancreatic, Kaposi’s sarcoma. The development of an easy method for its determination is required for both the dosage in cancer therapy and due its potential presence in environment and especially, in water samples. Boron doped diamond (BDD) electrode was electrochemically modified with copper (Cu) by chronoamperometry (CA) operated under optimized conditions of -0.75 V/SCE potential level for 120 minutes. Copper-modified boron-doped diamond (Cu/BDD) exhibited the electrocatalytic effect towards the paclitaxel and oxaliplatin oxidation, allowing their detection in 0.1 M NaOH supporting electrolyte. The limiting anodic current was noticed at the potential value of +0.75 V/SCE that increased linearly with PCX concentration, and at the potential value of + 0.6V/SCE for the oxaliplatin. Some mechanical aspects related to the PCX oxidation at Cu/BDD electrode in 0.1 M NaOH supporting electrolyte were determined using cyclic voltammetry (CV) recorded at various scan rates. CV was based on compounds detection and achieved the sensitivity of 0.65 μA/µM for oxaliplatin and respective, 5.47 μA/µM for paclitaxel. Keywords: copper, electrochemical detection, modified boron-doped diamond electrode paclitaxel, oxaliplatin

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Voltammetric quantification of a nonsteroidal anti-inflammatory agent diflunisal based on the enhancement effect of cationic surfactant on boron-doped diamond electrode

Macedonian Journal of Chemistry and Chemical Engineering ◽

10.20450/mjcce.2021.2172 ◽

2021 ◽

Vol 40 (1) ◽

pp. 11

Author(s):

Ertuğrul Keskin ◽

Shabnam Allahverdiyeva ◽

Amer Alali ◽

Yavuz Yardım

Keyword(s):

Cationic Surfactant ◽

Supporting Electrolyte ◽

Phosphate Buffer Solution ◽

Open Circuit ◽

Enhancement Effect ◽

Boron Doped Diamond ◽

Buffer Solution ◽

Solution Ph ◽

Square Wave ◽

Boron Doped

The present work describes a simple, fast, and inexpensive voltammetric method for diflunisal measurement using a non-modified boron-doped diamond (BDD) electrode. The oxidation of the agent was irreversible and presented a diffusion‐controlled process. The sensitivity of the square wave voltammetric measurements were significantly improved when the cationic surfactant, cetyltrimethylammonium bromide (CTAB), was present in the supporting electrolyte solution. Using square-wave mode, a linear response was obtained for diflunisal quantification in 0.1 mol L-1 phosphate buffer solution (pH 2.5) solution containing 5×10-5 mol L-1 CTAB at +1.07 V (vs. Ag/AgCl) (after 30 s accumulation under open-circuit conditions). Linearity was found for 0.05 to 2.0 μg mL-1 (2.0×10-7-8.0×10-6 mol L-1) with a detection limit 0.013 μg mL-1 (5.2×10-8 mol L-1). The developed approach could be used for the quantification of diflunisal in pharmaceutical formulations.

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Graphene Oxide Electroreduced onto Boron-Doped Diamond and Electrodecorated with Silver (Ag/GO/BDD) Electrode for Tetracycline Detection in Aqueous Solution

Nanomaterials ◽

10.3390/nano11061566 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1566

Author(s):

Sorina Negrea ◽

Lidia Ani Diaconu ◽

Valeria Nicorescu ◽

Sorina Motoc (m. Ilies) ◽

Corina Orha ◽

...

Keyword(s):

Aqueous Solution ◽

Graphene Oxide ◽

Limit Of Detection ◽

Supporting Electrolyte ◽

Pharmaceutical Formulations ◽

Modulation Amplitude ◽

Boron Doped Diamond ◽

Step Potential ◽

Bdd Electrode ◽

Boron Doped

A new electrochemical sensor designed by modifying the commercial boron-doped diamond (BDD) electrode with graphene oxide (GO) reduced electrochemically and further electrodecorated with silver (Ag), named the Ag/GO/BDD electrode, was selected among a series of the BDD, GOelectroreduced onto BDD (GO/BDD) and silver electrodeposited onto BDD (Ag/BDD) electrodes for the detection of tetracycline (TC) in aqueous solution. The best results regarding the sensitivity of 46.6 µA·µM−1·cm−2 and the lowest limit of detection of 5 nM was achieved using square-wave voltammetry (SWV) operated at the step potential of 5 mV, modulation amplitude of 200 mV and the frequency of 10 Hz in alkaline medium. The application of the alkaline supporting electrolyte-based procedure is limited for water monitoring due to the presence of chloride that interferes with TC detection; however, it can be applied for quantitative determination of pharmaceutical formulations. 0.1 M Na2SO4 supporting electrolyte eliminated chloride interference and can be used for the application of Ag/GO/BDD in practical detection of TC in water.

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DICLOFENAC REMOVAL FROM AQUEOUS SOLUTIONS BY ELECTROOXIDATION AT BORON-DOPED DIAMOND (BDD) ELECTRODE

Environmental Engineering and Management Journal ◽

10.30638/eemj.2015.145 ◽

2015 ◽

Vol 14 (6) ◽

pp. 1339-1345

Author(s):

Monica Ihos ◽

Florica Manea ◽

Maria Jitaru ◽

Corneliu Bogatu ◽

Rodica Pode

Keyword(s):

Aqueous Solutions ◽

Boron Doped Diamond ◽

Bdd Electrode ◽

Boron Doped

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Influence of Supporting Electrolyte on the Electrochemical Oxidation of Formic Acid on Boron-Doped Diamond Electrodes

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.20130008 ◽

2013 ◽

Vol 86 (6) ◽

pp. 749-754 ◽

Cited By ~ 5

Author(s):

Stéphane Fierro ◽

Yuki Honda ◽

Yasuaki Einaga

Keyword(s):

Formic Acid ◽

Electrochemical Oxidation ◽

Supporting Electrolyte ◽

Diamond Electrodes ◽

Boron Doped Diamond ◽

Boron Doped

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Study of the Electrochemical Deposition of Cu/Sn Alloy Nanoparticles on Boron Doped Diamond Films for Electrocatalytic Nitrate Reduction

MRS Proceedings ◽

10.1557/opl.2013.16 ◽

2013 ◽

Vol 1511 ◽

Cited By ~ 2

Author(s):

Jorge T. Matsushima ◽

Andrea B. Couto ◽

Neidenei G. Ferreira ◽

Mauricio R. Baldan

Keyword(s):

Electrochemical Deposition ◽

Sem Analysis ◽

Homogeneous Distribution ◽

Alloy Nanoparticles ◽

Electrocatalytic Reduction ◽

Boron Doped Diamond ◽

Buffer Solution ◽

Bdd Electrode ◽

Boron Doped ◽

Dissolution Peak

ABSTRACTThis paper presents the study of the electrochemical deposition of Cu/Sn alloy nanoparticles on Boron Doped Diamond (BDD) films in order to improve their electrocatalytic activity and selectivity for application in nitrate electrochemical reduction. Cyclic voltammetry measurements evidenced the formation of Cu/Sn alloy electrodeposited on BDD electrode. The electrodeposited Cu/Sn can be better visualized by analyzing the dissolution process. By studying the dissolution peak separately, the dissolution peak of the Sn was obtained at a more positive potential, when compared with the dissolution peak of Cu. From the scanning electronic microscopy (SEM) analysis, the homogeneous distribution of the Cu/Sn alloys particles on BDD surface with grain size in nanometric scale was verified. From X-ray diffraction analysis, two Cu/Sn alloy phases (Cu41Sn11 and Cu10Sn3) were identified for the electrodeposits obtained at -0.5V and charge of 0.26 C. The electrocatalytic reduction of nitrate in 0.1 M Britton-Robinson (BR) buffer solution with pH 9 was analyzed. The BDD electrode modified with Cu/Sn alloy nanoparticles proved to potentiate the electrocatalytic reduction of nitrate.

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