In-situ electrode fabrication from polyaniline derived N-doped carbon nanofibers for metal-free electro-Fenton degradation of organic contaminants

Haider, Muhammad Rizwan; Jiang, Wenli; Han, Jinglong; Sharif, Hafiz Muhammad Adeel; Ding, Yangcheng; Cheng, Hao-Yi; Wang, Aijie

doi:10.1016/j.apcatb.2019.117774

Cited by 147 publications

(31 citation statements)

References 54 publications

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“…, PCFs with rich meso/macro-pores, 303–306 PCFs with highly interconnected meso/macro-pore structure, 78,307 PCFs with defect-rich surface pore structure, 3,308–311 and PCFs with carbonaceous surface pore structure. 312,313 Among the doping materials, N as the most common doping element has been used to prepare metal-free carbon-based catalysts or catalyst supports. 12 Taking PCF-based oxygen reduction reaction (ORR) catalysts as an example, the commonly accepted advantage of N-doping is that the graphitic N and pyridinic N can determine the limiting current density and onset potential of electrocatalysts to improve the performance of ORR catalysts significantly.…”

Section: Mechanism Analysis Of Pcfs For Advanced Energy and Environmental Applicationsmentioning

confidence: 99%

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Liu

Kang

et al. 2022

J. Mater. Chem. A

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Section: Mechanism Analysis Of Pcfs For Advanced Energy and Environmental Applicationsmentioning

confidence: 99%

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Liu

Kang

et al. 2022

J. Mater. Chem. A

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“…The performance of electrospun CNFs with incorporated metal/metal oxide NPs for organic compounds removal by electro-Fenton oxidation has not been extensively studied [27]. Here, free-standing N-doped-CNF and N-doped-CNF-Co/CoO x electrodes were fabricated and their use for electrochemical degradation of AO7 in an aqueous solution was tested.…”

Section: Resultsmentioning

confidence: 99%

“…Metal/metal oxide NPs on the carbon electrode surface can be used as heterogeneous catalysts for the local generation of H 2 O 2 during the electro-Fenton oxidation process. Graphite [24], graphenes [25], carbon nanotubes [26], carbon nanofibers [27], carbon sponges [28], and carbon felts [14] are among the electrode materials with good conductivity investigated for the electrochemical production of H 2 O 2 . On the other hand, Fe 3+ sludge formation, due to the production of Fe 3+ , and the need for acidic pH (pH 2-4) for the electro-Fenton process can be solved by the mobilization of metal NPs (electrocatalyst) to overcome the narrow pH range required for the homogeneous electro-Fenton oxidation.…”

Section: Introductionmentioning

confidence: 99%

3D Self-Supported Nitrogen-Doped Carbon Nanofiber Electrodes Incorporated Co/CoOx Nanoparticles: Application to Dyes Degradation by Electro-Fenton-Based Process

et al. 2021

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We developed free-standing nitrogen-doped carbon nanofiber (CNF) electrodes incorporating Co/CoOx nanoparticles (NPs) as a new cathode material for removing Acid Orange 7 (AO7; a dye for wool) from wastewater by the heterogeneous electro-Fenton reaction. We produced the free-standing N-doped CNF electrodes by electrospinning a polyacrylonitrile (PAN) and cobalt acetate solution followed by thermal carbonation of the cobalt acetate/PAN nanofibers under a nitrogen atmosphere. We then investigated electro-Fenton-based removal of AO7 from wastewater with the free-standing N-doped-CNFs-Co/CoOx electrodes, in the presence or not of Fe2+ ions as a co-catalyst. The electrochemical analysis showed the high stability of the prepared N-doped-CNF-Co/CoOx electrodes in electrochemical oxidation experiments with excellent degradation of AO7 (20 mM) at acidic to near neutral pH values (3 and 6). Electro-Fenton oxidation at 10 mA/cm2 direct current for 40 min using the N-doped-CNF-Co/CoOx electrodes loaded with 25 wt% of Co/CoOx NPs led to complete AO7 solution decolorization with total organic carbon (TOC) removal values of 92.4% at pH 3 and 93.3% at pH 6. The newly developed N-doped-CNF-Co/CoOx electrodes are an effective alternative technique for wastewater pre-treatment before the biological treatment.

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“…The conducting catalyst layer, serving as the cathode, facilitated the reduction of Cu 2+ to generate Cu + , leading to the efficient recycling of the Cu + /Cu 2+ redox couple. Metal-free E-Fenton has also been recently proposed, as graphitic and pyridinic N sites on graphene-based materials appear to function as active sites for both the electrogeneration of H 2 O 2 and the activation of OH • radicals [54,126,148].…”

Section: Graphene-based Materials Combined With Iron Oxides and Other Metal Oxidesmentioning

confidence: 99%

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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In-situ electrode fabrication from polyaniline derived N-doped carbon nanofibers for metal-free electro-Fenton degradation of organic contaminants

Cited by 147 publications

References 54 publications

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

Structural design and mechanism analysis of hierarchical porous carbon fibers for advanced energy and environmental applications

3D Self-Supported Nitrogen-Doped Carbon Nanofiber Electrodes Incorporated Co/CoOx Nanoparticles: Application to Dyes Degradation by Electro-Fenton-Based Process

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

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