Enhanced electro-Fenton oxidation by introducing three-phase interface with simultaneous optimization of O2 and pollutant transfer for effective tetracycline hydrochloride removal

Geng, Jianxin; Zhang, Haichuan; Zhang, Zhenghao; Gao, Junxian; Wang, Shuibing; Hu, Xinyu; Li, Ji

doi:10.1016/j.cej.2022.137891

Cited by 18 publications

(5 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An excellent supply of O 2 can overcome the limitation of oxygen mass transfer, thereby allowing for a high rate of ORR. , In other words, enhancing the efficiency of oxygen mass transfer enables the highly efficient production of H 2 O 2 . The establishment of a superhydrophobic gas–liquid–solid three-phase interface by constructing a hydrophobic-layer cathode surface has been proven to be a feasible method …”

Section: Results and Discussionmentioning

confidence: 99%

“…The establishment of a superhydrophobic gas−liquid−solid three-phase interface by constructing a hydrophobic-layer cathode surface has been proven to be a feasible method. 53 The surface of M x OHSiO 2 /ACF is covered with a tunable number of methyl and hydroxyl moieties. The methyl moieties are nonpolar alkyl groups that lack the ability for substantial adsorption of or strong interaction with oxygen.…”

Section: Enhancedmentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO₂ having Tunable Hydrophobic/Hydrophilic Moieties

Tang,

Zhou,

Cao

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Electro-Fenton (EF) process is promising for achieving satisfactory oxidation of organic contaminants. However, the sluggish kinetics of in situ production of H 2 O 2 and slow rate of Fe 2+ regeneration remain its limitations. In this work, SiO 2 with tunable methyl and hydroxyl moieties on the surface (M x OHSiO 2 ; x denotes the mass ratio of diethoxydimethylsilane to tetraethyl orthosilicate) was successfully loaded onto activated carbon fiber (ACF) to construct an ACF-supported cathode (M x OHSiO 2 /ACF) for the degradation of bisphenol A (BPA). The M x OHSiO 2 /ACF exhibited substantially higher activity than bare ACF in the EF process. The removal of BPA proceeded most rapidly with M 0.75 OHSiO 2 /ACF with an initial pH of 3.0, an electrolyzing voltage of 20 V, and an Fe 2+ dosage of 0.5 mM. The mineralization efficiency was 79.3% after 360 min, with the complete disappearance of BPA recorded at 60 min during the EF process. In addition, the M 0.75 OHSiO 2 /ACF catalytic electrode remained stable for five successive cycling tests. Because of the synergistic effect of the hydrophobic methyl moiety and electron-rich hydroxyl moiety on SiO 2 , the H 2 O 2 electrogeneration and Fe 2+ regeneration at M 0.75 OHSiO 2 /ACF were simultaneously improved. This work provides an effective strategy for the application of EF technology in future.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Section: Enhancedmentioning

confidence: 99%

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO₂ having Tunable Hydrophobic/Hydrophilic Moieties

Tang,

Zhou,

Cao

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…For example, Geng et al designed a sandwich electrode by coating a hydrophilic catalyst on both sides of a hydrophobic substrate (Figure 1f). 67 This arrangement allows for the rapid transport of oxygen to the electrode's interior, leading to the production of H 2 O 2 . Simultaneously, the generated H 2 O 2 can efficiently contact with iron oxide to produce • OH.…”

Section: Heterogeneous Ef Processesmentioning

confidence: 99%

Section: Pathways and Mechanisms Of Electro-fenton Systemsmentioning

confidence: 99%

Perspectives of Wood-Inspired Electro-Fenton Catalysis for Energy-Efficient Wastewater Decontamination

Zhong,

Zhu,

Zhou

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

A large-scale deployment of electro-Fenton (EF) technology faces significant challenges, including the high cost of catalysts, complex electrode preparation, and limited energy utilization efficiency. Wood-derived carbon materials (WDCM) with three-dimensional (3D) structures have shown immense potential for energy storage and environmental remediation, due to their low cost and raw-material abundance, particularly the hierarchical structures for efficient mass transfer and ease of modification in electrochemical performance. The cost-effecitve and environmentally friendly nature as well as outstanding electrochemical performances make WDCM promising candidates for green and renewable electro-Fenton (EF) systems. In WDCM-based EF systems, it is crucial to explore suitable strategies for structural engineering and modification, enabling a better understanding of the relationships among structure, property, and performance. In this review, we present a perspective on wood redesign through structural engineering and chemical modification to regulate its mechanical properties and optimize mass transfer in electrochemical performance. Furthermore, we comprehensively discuss the recent advances and pathways of wood-based electro-Fenton systems. Finally, we provide a road map for the future challenges and opportunities of upscaling wood-based electro-Fenton systems for practical water treatments.

show abstract

“…As a result, the effective range of the oxidation process by • OH is limited to only 50 nm in the classical Fenton reaction and about 1 μm from the electrode surface in the electrochemical oxidation system. , Many efforts have been devoted to solving these issues and improving the efficiency of pollutant degradation. For instance, a gas diffusion electrode (GDE) will facilitate O 2 transfer and H 2 O 2 generation; − a sandwich-structured electrode will improve reactants transfer between the layers; materials or electrodes of high adsorption capacity will enhance pollutant adsorption for improved utilization efficiency of hydroxyl radicals ( • OH) due to shorter mass transfer distance. , …”

Section: Introductionmentioning

confidence: 99%

Electro-Fenton-Based Membrane System for Organic Micropollutant Removal: New Trend and Prospect

et al. 2023

View full text Add to dashboard Cite

Electro-Fenton-based membrane (EFM) technologies are promising for removing micropollutants in wastewater bearing several benefits such as minimized chemical input, accelerated reactive oxygen species (ROS) generation, and improved ROS utilization efficiency, thanks to the enhanced mass transfer and effectively enlarged electroactive area. However, the complex mechanism and synergies between electro-Fenton reactions and membrane confinement remain unclear; gaining such information would be much beneficial for rational catalyst/membrane design, system optimization, and further application in actual water conditions. In this Perspective, we systematically describe the membrane compositions, multiple reaction pathways, and advances in EFM systems. Then, we proposed some promising hybrid systems that exhibit great synergies in maximizing purification efficiency. Finally, this perspective provides a roadmap for the future development of EFM systems with low cost and high efficiency by outlining the advanced membrane material design, coupling processes, and integrated device design.

show abstract

Enhanced electro-Fenton oxidation by introducing three-phase interface with simultaneous optimization of O2 and pollutant transfer for effective tetracycline hydrochloride removal

Cited by 18 publications

References 51 publications

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO₂ having Tunable Hydrophobic/Hydrophilic Moieties

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO₂ having Tunable Hydrophobic/Hydrophilic Moieties

Perspectives of Wood-Inspired Electro-Fenton Catalysis for Energy-Efficient Wastewater Decontamination

Electro-Fenton-Based Membrane System for Organic Micropollutant Removal: New Trend and Prospect

Contact Info

Product

Resources

About

Enhanced electro-Fenton oxidation by introducing three-phase interface with simultaneous optimization of O2 and pollutant transfer for effective tetracycline hydrochloride removal

Cited by 18 publications

References 51 publications

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO2 having Tunable Hydrophobic/Hydrophilic Moieties

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO2 having Tunable Hydrophobic/Hydrophilic Moieties

Perspectives of Wood-Inspired Electro-Fenton Catalysis for Energy-Efficient Wastewater Decontamination

Electro-Fenton-Based Membrane System for Organic Micropollutant Removal: New Trend and Prospect

Contact Info

Product

Resources

About

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO₂ having Tunable Hydrophobic/Hydrophilic Moieties

Enhancement of Activity of Activated Carbon Fiber for Electro-Fenton Process by Loading it with SiO₂ having Tunable Hydrophobic/Hydrophilic Moieties