Carbon nanotube filter functionalized with iron oxychloride for flow-through electro-Fenton

Li, Zizhen; Shen, Chensi; Liu, Yanbiao; Ma, Chunfeng; Li, Fang; Yang, Bo; Huang, Manhong; Wang, Zhiwei; Dong, Liming; Sand, Wolfgang

doi:10.1016/j.apcatb.2019.118204

Cited by 134 publications

(43 citation statements)

References 50 publications

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“…[8] Within this context, the heterogeneous EF catalysts require considerable activity for both H 2 O 2 generation and decomposition, [9][10][11] which consequently increase the difficulty in catalyst design and fabrication due to the higher structural complexity of the catalyst. Currently, carbon matrix (C) supported transition metal (TM) materials (TM/C) still majored in the preparation of heterogeneous EF catalyst , [12][13][14] where TM and carbon matrix could serves as the heterogeneous Fenton and 2e − oxygen reduction reaction (ORR) actives sites, [15] respectively. Besides, the carbon matrix could also support the TM particles and promote its electron transfer.…”

Section: Ho Ohmentioning

confidence: 99%

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Cheng

Zheng

Shen

et al. 2021

Adv Funct Materials

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The heterogeneous electro-Fenton (EF) process is a promising wastewater treatment technology for the onsite production of H 2 O 2 and avoidance of iron sludge. However, the preparation of the cathode catalysts remains a challenge. Not only must the catalyst surface possesses active sites for both 2e − oxygen reduction reaction and heterogeneous Fenton reaction, preventing active metals from continuous leaching is also crucial to maintain its catalytic activity. Herein, a heterogeneous catalyst (rGO@Fe x P/C) with a vacuumized package-like structure, where carbon-supported iron phosphides (Fe x P/C) are tightly covered within interconnected reduced graphene oxide (rGO) sheets, is successfully prepared. The concentration of iron that dissolved from rGO@ Fe x P/C after the reaction is only 3.37% of bare Fe x P/C (14.6 mg L −1 ), while rGO@Fe x P/C achieves better performance towards sulfamethoxazole (10 mg L −1 ) degradation than Fe x P/C. Investigation on rGO@Fe x P/C with different thicknesses of outer rGO layer and diverse morphologic structures demonstrate that the unique structure of rGO@Fe x P/C played a decisive role in the simultaneously enhanced activity and stability.

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Section: Ho Ohmentioning

confidence: 99%

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Cheng

Zheng

Shen

et al. 2021

Adv Funct Materials

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“…The oxidation and adsorption at the CNT electrode, especially for Fenton reaction (Fe was loaded in cathode materials), could be combined, allowing a promising process for effective wastewater treatment [179][180][181][182]. The increase in surface area of cathode led to decrease the cathodic resistance for charge transfer, which was beneficial to anodic potential and electrooxidation [183].…”

Section:  Raw Cntsmentioning

confidence: 99%

Nanostructured electrodes for electrocatalytic advanced oxidation processes: From materials preparation to mechanisms understanding and wastewater treatment applications

Oturan

Zhou

et al. 2021

Applied Catalysis B: Environmental

124

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“…M (n+1)+ + e -→ M n+ (3) EF in batch reactors were intensively developed for environmental applications. Alternatively, EF process coupling with a cathodic flow-through process has recently attracted interests [7][8][9][10][11][12][13][14][15][16] since it substantially improved the mass transfer towards cathode by forced permeation, as well as provided a larger active electrode area by means of porous structures. Nevertheless, some research [8][9][10]12] only applied unmodified or commercial membranes as the cathodes without decorating active EF catalysts, limiting the removal efficiency.…”

Section: O2 + 2e -+ 2h + → H2o2mentioning

confidence: 99%

Degradation of Hazardous Organics via Cathodic Flow-through Process Using a Spinel FeCo2O4/CNT Decorated Stainless-Steel Mesh

Fan¹,

Deng²,

Gang³

et al. 2021

ES Mater. Manuf.

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Cathodic membranes were applied with Fe 2+ reagent to enhance the mass transport of electro-Fenton (EF) by means of forced permeation. However, the considerable amount of toxic Fe 2+ reagent left in electrolytes may cause secondary pollution. Also, the membranes without active EF catalysts exposed low removal efficiency due to insufficient surface catalytic activity. In this work, an advanced flow-through process without toxic Fe 2+ reagent was developed using modified stainless steel (SS) mesh with high catalytic activity. The surface of SS mesh was decorated by catalytically-active FexCo3-xO4 nanoparticles and functionalized carbon nanotubes (CNTs). The synergistic effect between Fe and Co elements enhanced the electro-Fenton efficiency, and the optimal n(Fe): n(Co) ratio was determined at 1:2 from the degradation rate of pollutants and H2O2. The addition of FeCo2O4/CNT enhanced the first-order reaction rate k to 2.60 times on bisphenol A (BPA) removal, and 2.16 times on sulfamethoxazole (SMX) removal, compared to an undecorated mesh. Consequently, 94% of BPA were eliminated after 60 min and 100% of SMX were eliminated after 120 min, respectively, under a low current density of 2.84 mA cm -1 . The total concentration of leached Fe/Co ions into the electrolyte was only around 2.4 µmol L -1 after the treatment.

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Carbon nanotube filter functionalized with iron oxychloride for flow-through electro-Fenton

Cited by 134 publications

References 50 publications

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

Nanostructured electrodes for electrocatalytic advanced oxidation processes: From materials preparation to mechanisms understanding and wastewater treatment applications

Degradation of Hazardous Organics via Cathodic Flow-through Process Using a Spinel FeCo2O4/CNT Decorated Stainless-Steel Mesh

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