Electrocatalytic phenol degradation by a novel nanostructured carbon fiber brush cathode coated with graphene ink

Mousset, Emmanuel; Wang, Zuxin; Hammaker, Joshua; Lefebvre, Olivier

doi:10.1016/j.electacta.2017.11.104

Cited by 52 publications

(26 citation statements)

References 46 publications

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“…However, the energy consumption was 420 kWh kgTOC −1 , which was much higher than that of our work (66.4 kWh kgTOC −1 ) 71 . Compared with the TOC removal efficiency and energy consumption of these pollutants in literature, EF process based on NADE had a good performance, especially lower energy consumption (36.6-91.7 kWh kgTOC −1 ) 22,72,73 .…”

Section: And Supplementarymentioning

confidence: 86%

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

et al. 2020

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Hydrogen peroxide (H 2 O 2) synthesis by electrochemical oxygen reduction reaction has attracted great attention as a green substitute for anthraquinone process. However, low oxygen utilization efficiency (<1%) and high energy consumption remain obstacles. Herein we propose a superhydrophobic natural air diffusion electrode (NADE) to greatly improve the oxygen diffusion coefficient at the cathode about 5.7 times as compared to the normal gas diffusion electrode (GDE) system. NADE allows the oxygen to be naturally diffused to the reaction interface, eliminating the need to pump oxygen/air to overcome the resistance of the gas diffusion layer, resulting in fast H 2 O 2 production (101.67 mg h-1 cm-2) with a high oxygen utilization efficiency (44.5%-64.9%). Long-term operation stability of NADE and its high current efficiency under high current density indicate great potential to replace normal GDE for H 2 O 2 electrosynthesis and environmental remediation on an industrial scale.

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Section: And Supplementarymentioning

confidence: 86%

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

et al. 2020

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“…(1)) and/or in the bulk through electrochemically assisted Fenton reaction (Eq. (2)) are the most widely studied processes due to their excellent efficiency and ease of operation [1,3,5,9,10].…”

Section: Introductionmentioning

confidence: 99%

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Ganiyu

Oturan

Raffy

et al. 2019

Separation and Purification Technology

117

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This paper investigates the behavior of conductive Ti 4 O 7 ceramic anode in different electrolytes during the degradation of the anti-inflammatory drug paracetamol (PCM) by advanced electrochemical oxidation processes mainly anodic oxidation with generation of H 2 O 2 (AO-H 2 O 2) and electro-Fenton (EF). Regardless of the medium, better degradation and mineralization efficiency was always observed with EF compared to AO-H 2 O 2. The degradation of PCM was carried out by hydroxyl radical (% OH) produced on the anode surface from water oxidation and mediated oxidation in the solution from oxidant species generated at the anode such as sulfate radicals and active chlorine species depending on the supporting electrolytes used, as well as % OH generated homogeneously in the solution by electrochemically assisted Fenton's reaction. Faster degradation was observed in Cl − compared to other media, but the solution was poorly mineralized. Highest total organic (TOC) removal efficiency with excellent degradation rate was attained in SO 4 2− with either process, thus remain the best medium for advanced electrochemical wastewater treatment. Comparative studies with dimensional stable anode (DSA) and boron-doped diamond anode (BDD) showed similar trend of degradation and TOC removal efficiency with DSA anode achieving low mineralization power compared to Ti 4 O 7 anode, whereas BDD showed slightly better efficiency than Ti 4 O 7 in all electrolytes studied. The analysis of concentration of generated active chlorine species, especially ClO − , during AO-H 2 O 2 decreased in the order: DSA > Ti 4 O 7 > BDD. Therefore, the Ti 4 O 7 electrode was found to be a promising anode material for an efficient treatment of PCM in SO 4 2− , NO 3 − and ClO 4 − media but less effective in Cl − medium.

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“…In addition to electrophoretic deposition and coating from graphene-containing slurries, there has been considerable interest in graphene-based inks that can be painted or printed onto substrates [69,70]. This approach has been employed to produce graphene-based cathodes in E-Fenton [6,71]. Conducting graphene-based inks have been formed in ethanol and water mixtures using Nafion as a binder and dispersant, and the resulting ink coated onto carbon cloth [71] and carbon fibres [6].…”

Section: Graphene Modified Carbon/graphite Felt Electrodes and Other Supportsmentioning

confidence: 99%

“…This approach has been employed to produce graphene-based cathodes in E-Fenton [6,71]. Conducting graphene-based inks have been formed in ethanol and water mixtures using Nafion as a binder and dispersant, and the resulting ink coated onto carbon cloth [71] and carbon fibres [6]. These ink-coated cathodes have been shown to give rise to a near doubling of the amount of H 2 O 2 generated and a three-fold increase in the rate of phenol degradation.…”

Section: Graphene Modified Carbon/graphite Felt Electrodes and Other Supportsmentioning

confidence: 99%

“…These processes range from UV irradiation and ozonation to electrochemical oxidation [1,4,5]. The electro-Fenton (E-Fenton) process has been identified as a particularly attractive technology, as it is clean and can be used to generate reasonably high concentrations of hydroxy radicals, OH • , that can be employed in the oxidation, degradation and mineralisation of various organic compounds and is considered to be one of the more promising and emerging AOPs [1,6,7].…”

Section: Introductionmentioning

confidence: 99%

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Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process

Tian

Breslin

2020

Materials

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In recent years, graphene-based materials have been identified as an emerging and promising new material in electro-Fenton, with the potential to form highly efficient metal-free catalysts that can be employed in the removal of contaminants from water, conserving precious water resources. In this review, the recent applications of graphene-based materials in electro-Fenton are described and discussed. Initially, homogenous and heterogenous electro-Fenton methods are briefly introduced, highlighting the importance of the generation of H2O2 from the two-electron reduction of dissolved oxygen and its catalysed decomposition to produce reactive and oxidising hydroxy radicals. Next, the promising applications of graphene-based electrodes in promoting this two-electron oxygen reduction reaction are considered and this is followed by an account of the various graphene-based materials that have been used successfully to give highly efficient graphene-based cathodes in electro-Fenton. In particular, graphene-based composites that have been combined with other carbonaceous materials, doped with nitrogen, formed as highly porous aerogels, three-dimensional materials and porous gas diffusion electrodes, used as supports for iron oxides and functionalised with ferrocene and employed in the more effective heterogeneous electro-Fenton, are all reviewed. It is perfectly clear that graphene-based materials have the potential to degrade and mineralise dyes, pharmaceutical compounds, antibiotics, phenolic compounds and show tremendous potential in electro-Fenton and other advanced oxidation processes.

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Electrocatalytic phenol degradation by a novel nanostructured carbon fiber brush cathode coated with graphene ink

Cited by 52 publications

References 46 publications

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process

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