Synthesis of an iron-graphene based particle electrode for pesticide removal in three-dimensional heterogeneous electro-Fenton water treatment system

Ghanbarlou, Hosna; Nasernejad, Bahram; Fini, Mahdi Nikbakht; Simonsen, Morten Enggrob; Muff, Jens

doi:10.1016/j.cej.2020.125025

Cited by 94 publications

(25 citation statements)

References 76 publications

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“…The detailed protocol for synthesis of the NCPE material and characterization of the material is published in our earlier work [19]. In brief, Na 4 Fe(CN) 6 × 10H2O (Prussian blue) was dried in an oven at 150 • C for 24 h before annealing in a low nitrogen flow rate at 900 • C for 3 h in a tube furnace (EHA 12/450B horizontal tube furnace, CARBOLITE, Sheffield, UK) with a heat-up rate of 5 • C/min to convert it to the hybrid material.…”

Section: Synthesis Of Nitrogen-doped Catalytic Particle Electrodes (Nmentioning

confidence: 99%

“…In addition, it was clear from the EDS mapping of the nanocatalyst surface that a good distribution of nitrogen and iron species was achieved by the applied synthesis method, which plays an important role in creating active sites on the catalyst surface for the ORR. It is worthwhile to mention that a full characterization report of the synthesized NCPEs can be found in our earlier paper [19].…”

Section: Morphological Characterizationmentioning

confidence: 99%

“…The improvement of three-dimensional electrochemical systems (using GACs as the third electrode) was attributed to its extensive specific surface area [13][14][15] and the ability of carbon materials to promote the generation of hydrogen peroxide by an oxygen reduction reaction [16][17][18]. Nevertheless, when GAC is applied as the third electrode, the efficiency of the technology depends mostly on the adsorption properties of the organic micropollutants [19,20]. For instance, some compounds such as phenoxy-acid herbicides have less tendency to adsorb to the carbon [10], resulting in low adsorption capacity and low removal efficiency in these systems.…”

Section: Introductionmentioning

confidence: 99%

“…This can cause a significant increase in the synergy of the process. Therefore, the combination of carbon-iron [45,47] or nitrogen-doped carbon and iron species [19] are considered interesting to stimulate electro-oxidation and reduction processes, leading to a higher synergy parameter. As mentioned before, this higher synergy would increase efficiency, thus reducing the energy consumption and costs of the treatment process.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous work, a novel nanostructure of nitrogen-doped catalytic particle electrode (NCPE) was synthesized [19]. The morphological characterization of synthesized NCPEs demonstrated the presence of a raspberry-like nanostructure of graphene sheets and iron nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

Ghanbarlou

Pedersen

Simonsen

et al. 2020

Water

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The synergy between electrochemical oxidation and adsorption on particle electrodes was investigated in three-dimensional (3D) systems for p-nitrosodimethylaniline (RNO) decolorization and pesticide removal. A comparison was made between granular activated carbon (GAC) and a novel synthesized nitrogen-doped graphene-based particle electrode (NCPE). Experiments on RNO decolorization show that the synergy parameter of the 3D-NCPE system was improved 3000 times compared to the studied 3D-GAC system. This was due to the specific nanostructure and composition of the NCPE material. Nitrogen-doped graphene triggered an oxygen reduction reaction, producing hydrogen peroxide that simultaneously catalyzed on iron sites of the NCPEs to hydroxyl radicals following the electro-Fenton (EF) process. Data showed that in the experimental setup used for the study, the applied cell voltage required for the optimal value of the synergy parameter could be lowered to 5V in the 3D-NCPEs process, which is significantly better than the 15–20 V needed for synergy to be found in the 3D-GAC process. Compared to previous studies with 3D-GAC, the removal of pesticides 2,6 dichlorobenzamide (BAM), 2-methyl-4-chlorophenoxyaceticacid (MCPA), and methylchlorophenoxypropionic acid (MCPP) was also enhanced in the 3D-NCPE system.

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Section: Synthesis Of Nitrogen-doped Catalytic Particle Electrodes (Nmentioning

confidence: 99%

Section: Morphological Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

Ghanbarlou

Pedersen

Simonsen

et al. 2020

Water

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Co₃O₄/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms

Zhao

Zhang

2022

J of Chemical Tech & Biotech

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BACKGROUND: Conventional electrochemical oxidation (EO) processes do not easily activate peroxymonosulfate (PMS) and are susceptible to the effects of electrode size, material and large-distance two-dimensional (2D) electrode structures, resulting in low mass transfer efficiency and low electrolytic productivity, limiting their ability to degrade pollutants. It is still a challenge to design and prepare a system and materials to enhance the activation of PMS and the EO process. RESULTS: Co 3 O 4 -loaded carbon felt three-dimensional (3D) electrode material (Co/CF) was prepared and used to construct a 3D electrocatalytic synergistic system (EO-Co/CF-PMS). The system combined the advantages of bipolar electrochemistry, threedimensional electrochemistry and advanced oxidation processes based on sulfate radical (SR-AOPs) to facilitate the activation of PMS for degradation of p-nitrophenol (PNP) in water. In addition, the synergistic system showed excellent pollutant degradation performance, achieving 89.51% PNP degradation in 10 min with an energy consumption of 0.4255 kWh m −3 . After being used for four consecutive cycle experiments, the synergistic system still achieved 83% PNP removal. Besides, the EO process also facilitated the Co cycle, resulting in a continuous and efficient degradation of the pollutants. The effects of experimental parameters (initial pH, PMS dose, and applied voltage) on PNP elimination were determined. The results of a reactive oxygen species scavenging experiment and electron spin resonance analysis showed that •OH, SO 4•− , and 1 O 2 all played a major role in the PNP elimination process.CONCLUSIONS: The research demonstrated that the composite catalyst Co/CF improved the property of the EO process for catalyzing PMS and thus enlarged the practical application of AOPs in pollutant degradation in aqueous solution.

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Coupling Fe₃C Nanoparticles and N‐Doping on Wood‐Derived Carbon to Construct Reversible Cathode for Zn–Air Batteries

Cao

Liu

Sun

et al. 2022

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Electrochemical reduction of oxygen plays a critical role in emerging electrochemical energy technologies. Multiple electron transfer processes, involving adsorption and activation of O2 and generation of protons from water molecules, cause the sluggish kinetics of the oxygen reduction reaction (ORR). Herein, a double‐active‐site catalyst of Fe3C nanoparticles coupled to paulownia wood‐derived N‐doped carbon (Fe3C@NPW) is fabricated via an active‐site‐uniting strategy. One site on Fe3C nanoparticles contributes to activating water molecules, while another site on N‐doped carbon is responsible for activating oxygen molecules. Benefiting from the synergistic effect of double active sites, Fe3C@NPW delivers a remarkable catalytic activity for ORR with a half‐wave potential of 0.87 V (vs. RHE) in alkaline electrolyte, outperforming commercial Pt/C catalyst. Moreover, zinc–air batteries (ZABs) assembled with Fe3C@NPW as a catalyst on cathode achieve a large specific capacity of 804.4 mA h gZn−1 and a long‐term stability of 780 cycles. The model solid‐state ZABs also display satisfactory performances with an open‐circuit voltage of 1.39 V and a high peak power density of 78 mW cm−2. These outstanding performances reach the level of first‐rank among the non‐noble metal electrode materials. This work offers a promising approach to creating double‐active‐site catalysts by the active‐site‐uniting strategy for energy conversion fields.

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Synthesis of an iron-graphene based particle electrode for pesticide removal in three-dimensional heterogeneous electro-Fenton water treatment system

Cited by 94 publications

References 76 publications

Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

Co₃O₄/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms

Coupling Fe₃C Nanoparticles and N‐Doping on Wood‐Derived Carbon to Construct Reversible Cathode for Zn–Air Batteries

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Synthesis of an iron-graphene based particle electrode for pesticide removal in three-dimensional heterogeneous electro-Fenton water treatment system

Cited by 94 publications

References 76 publications

Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

Co3O4/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms

Coupling Fe3C Nanoparticles and N‐Doping on Wood‐Derived Carbon to Construct Reversible Cathode for Zn–Air Batteries

Contact Info

Product

Resources

About

Co₃O₄/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms

Coupling Fe₃C Nanoparticles and N‐Doping on Wood‐Derived Carbon to Construct Reversible Cathode for Zn–Air Batteries