A highly active based graphene cathode for the electro-fenton reaction

Le, Thi Xuan Huong; Bechelany, Mikhaël; Champavert, Joffrey; Cretin, Marc

doi:10.1039/c5ra04811g

Cited by 77 publications

(64 citation statements)

References 28 publications

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“…One strategy against electrode dissolution is the use of inert yet conductive carbonbased electrodes [130][131][132]. The charge neutralisation mechanism has also been reported to govern the deposit formation for GRM sheets decorated with other charged species, similar to the case of GO, including PIHA (polymeric isocyanate crosslinked with hydroxy functional acrylic adhesive) [127], hyaluronic acid [133], methyl violet dye [112], aluminon [134], safranin [113] and Ni ions [96].…”

Section: Mechanisms Of Deposit Formationmentioning

confidence: 99%

Electrophoretic deposition of graphene-related materials: A review of the fundamentals

Diba

Fam

Boccaccını

et al. 2016

Progress in Materials Science

223

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The Electrophoretic Deposition (EPD) of graphene-related materials (GRM) is an attractive strategy for a wide range of applications. This review paper provides an overview of the fundamentals and specific technical aspects of this approach, highlighting its advantages and limitations. Since obtaining a stable dispersion of charged particles is a pre-requisite for successful EPD, the strategies for suspending GRM in different media are discussed, along with the resulting influence on the deposited film. Most importantly, the kinetics involved in the EPD of GRMs and the factors that cause deviation from linearity in Hamaker's Law are reviewed. Side reactions often influence both efficiency and the nature of the deposited material; examples include the reduction of graphene oxide (GO) and related materials, as well as the decomposition of the suspension medium at high potentials. The microstructural characteristics of GRM deposits, and their degree of reduction, strongly influence their performance in their intended function. These factors will also determine, to a large extent, the commercial potential of this technique for applications involving GRM, and are therefore discussed here.

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Section: Mechanisms Of Deposit Formationmentioning

confidence: 99%

Electrophoretic deposition of graphene-related materials: A review of the fundamentals

Diba

Fam

Boccaccını

et al. 2016

Progress in Materials Science

223

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“…The result proved the efficiency of application CNTs in EF process thanks to its advantages like excellent conductivity and high surface are which were well discussed in introduction part. These properties bring to many benefits for EF experiment: (i) high surface supplies more active sites for oxidation reactions happening at surface of electrode (Le et al, 2016a) and (ii) good conductivity accelerated the electron rate for more oxygen molecular reduced to H2O2 which is the main key to improve the performance of EF treatment (Le et al, 2015a). In fact, thanks to the high surface area (~260 m 2 /g) of CNTF@CF cathode, more organic dye molecular can be adsorbed and degraded in the pore structure of the fiber, leading to a quicker mineralization rate in comparison with the pristine one (Figure 2A).…”

Section: Mineralization Of Ao7 Using Ef Processmentioning

confidence: 99%

“…To improve the performance (i.e., the conductivity, the surface area and the hydrophilicity) of cathodic electrode, many modification ways have been successfully applied (Le et al, 2015a). Graphene modification could enhance significantly the electrochemical property of commercial carbon felt (Le et al, 2015b).…”

mentioning

confidence: 99%

“…In EF process, carbonaceous materials are usually used as cathode, such as reticulated vitreous carbon (Martínez and Uribe, 2012), carbon sponge (Özcan et al, 2008), carbon felt (Le et al, 2015a), three-dimensional graphite system (Wang et al, 2008), or activated carbon fiber (Wang et al, 2005). To improve the performance (i.e., the conductivity, the surface area and the hydrophilicity) of cathodic electrode, many modification ways have been successfully applied (Le et al, 2015a).…”

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confidence: 99%

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Enhanced Electro-Fenton Mineralization of Acid Orange 7 Using a Carbon Nanotube Fiber-Based Cathode

Alemán

Vilatela

et al. 2018

Front. Mater.

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A new cathodic material for electro-Fenton (EF) process was prepared based on a macroscopic fiber (CNTF) made of mm-long carbon nanotubes directly spun from the gas phase by floating catalyst CVD, on a carbon fiber (CF) substrate. CNTF@CF electrode is a highly graphitic material combining a high surface area (~260 m 2 /g) with high electrical conductivity and electrochemical stability. One kind of azo dye, acid orange 7 (AO7), was used as model bio-refractory pollutant to be treated at CNTF@CF cathode in acidic aqueous medium (pH 3.0). The experimental results pointed out that AO7 and its organic intermediate compounds were totally mineralized by hydroxyl radical generated from Fenton reaction. In fact, 96.7% of the initial total organic carbon (TOC) was eliminated in 8 h of electrolysis by applying a current of −25 mA and ferrous ions as catalyst at concentration of 0.2 mM. At the same electrolysis time, only 23.7% of TOC removal found on CF support which proved the high mineralization efficiency of new material thanks to CNTF deposition. The CNTF@CF cathode maintained stable its activity during five experimental cycles of EF setup. The results indicated that CNTF@CF material could be a potential choice for wastewater treatment containing bio-refractory by electrochemical advanced oxidation processes.

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“…An alternative way to produce graphene and yet to meet commercial demand is to first exfoliate graphene oxide (GO) from graphite oxide by solution-based processes followed by reduction of GO by chemical (using suitable reducing reagent for example hydrazine, ascorbic acid, hydroquinone, sodium borohydride, etc. ), thermal, electrochemical or UV-assisted approaches in order to obtain a reduced graphene oxide (rGO) [8,[20][21][22][23][24][25][26][27][28][29][30][31], which should have similar properties to pristine graphene.…”

Section: Introductionmentioning

confidence: 99%

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

et al. 2016

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Abstract:The aim of this study is to compare the electrochemical behaviour of graphene-based materials of different origin, e.g., commercially available graphene nanosheets from two producers and reduced graphene oxide (rGO) towards the oxygen reduction reaction (ORR) using linear sweep voltammetry, rotating disc electrode and rotating ring-disc electrode methods. We also investigate the effect of catalyst ink preparation using two different solvents (2-propanol containing OH´ionomer or N,N-dimethylformamide) on the ORR. The graphene-based materials are characterised by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. Clearly, the catalytic effect depends on the origin of graphene material and, interestingly, the electrocatalytic activity of the catalyst material for ORR is lower when using the OH´ionomer in electrode modification. The graphene electrodes fabricated with commercial graphene show better ORR performance than rGO in alkaline solution.

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A highly active based graphene cathode for the electro-fenton reaction

Cited by 77 publications

References 28 publications

Electrophoretic deposition of graphene-related materials: A review of the fundamentals

Electrophoretic deposition of graphene-related materials: A review of the fundamentals

Enhanced Electro-Fenton Mineralization of Acid Orange 7 Using a Carbon Nanotube Fiber-Based Cathode

An Oxygen Reduction Study of Graphene-Based Nanomaterials of Different Origin

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