On-site H2O2 electro-generation process combined with ultraviolet: A promising approach for odorous compounds purification in drinking water system

Zhao, Yiying; Deng, Ning; Fan, Zhiheng; Hu, Zhong‐Ting; Fan, Lili; Zhou, Jizhi; Huang, Xin

doi:10.1016/j.cej.2021.132829

Cited by 28 publications

(16 citation statements)

References 55 publications

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“…In addition, a relatively low cobalt leaching amount (<0.22 mg L −1 ) was detected throughout the process, which is lower than the allowable limit of Environmental Quality Standards for Surface Water in China (Co: 1 mg L −1 , GB3838-2002). 61,62 Figure 6d illustrates background water resources and the effect of adding 10 mg L −1 BPA in Guangzhou, China. The results indicate that the removal efficiency of BPA in water bodies and that in rivers were similar, but less than that in the laboratory effluents (Guangzhou Pearl River water and Sun Yat-sen University Central Lake Park landscape water).…”

Section: Identification Of the Reactive Speciesmentioning

confidence: 99%

Boosting Fenton-like Catalysis via Electron Tunneling-Based C–Co Charge-Transfer Bridge in Nitrogen-Doped Cobalt@Carbon Nanotube-Grafted Carbon Polyhedron

Liu

et al. 2022

ACS EST Eng.

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Transition metal@carbon heterostructures are an emerging material paradigm for enhancing Fenton-like catalysis, and the synthesis of this heterostructure with designed functionality derived from metal−organic frameworks (MOFs) is interesting and challenging. Herein, we developed MOF-on-MOF nanoarchitectures to construct a selectively functionalized nitrogen-doped cobalt@ carbon nanotube-grafted carbon (Co@NCNT/NC) polyhedron via the thermal treatment of elaborately designed ZIF-8@ZIF-67 core− shell precursors for water decontamination. Strikingly, the Co@ NCNT/NC heterojunction is more conducive to transporting electrons to adjacent Co atoms than Co@NC, because of its high d-band center, strong conductivity, and the formation of multiple C−Co bonds for electron tunneling. Deliberate material design and theoretical simulations unveil that the dual reaction centers in C−Co bonds significantly alter the electronic structure of Co atoms, which creates the electron-rich Co centers further enhancing the specific adsorption/activation of H 2 O 2 . Simultaneously, the loss of electrons in Co species reduces the surrounding energy levels, resulting in the electrons of pollutants adsorbed on the surface of Co@NCNT/NC entering Co species through C−Co chargetransfer bridges, thus maintaining the redox cycle of Co 2+ → Co 3+ → Co 2+ , and realizing the efficient and stable removal of pollutants. This work highlights the importance of the transition metal@carbon heterostructures to advanced catalytic oxidation and the MOF-on-MOF nanoarchitectures on nanomaterials synthetic chemistry.

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Section: Identification Of the Reactive Speciesmentioning

confidence: 99%

Boosting Fenton-like Catalysis via Electron Tunneling-Based C–Co Charge-Transfer Bridge in Nitrogen-Doped Cobalt@Carbon Nanotube-Grafted Carbon Polyhedron

Liu

et al. 2022

ACS EST Eng.

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“…22 Practical implementations of electrochemical membranes are largely hampered by electrode material stability and operational cost for long-term use. 23 For instance, ERMs are often needed to operate at relatively high overpotentials to effectively degrade persistent pollutants. However, high electrode potentials cause high electrical consumption and risks of inducing undesirable water oxidation or oxygen evolution on anode or chlorine or hydrogen gas evolution on cathode.…”

Section: Introductionmentioning

confidence: 99%

“…Practical implementations of electrochemical membranes are largely hampered by electrode material stability and operational cost for long-term use . For instance, ERMs are often needed to operate at relatively high overpotentials to effectively degrade persistent pollutants.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Aging and Halogen Oxides Formation on Multiwalled Carbon Nanotubes and Fe₃O₄@g-C₃N₄ Coated Conductive Membranes

Gao

Potts

et al. 2022

Ind. Eng. Chem. Res.

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Electrochemical membrane filtration is widely reported to enhance water contaminants’ degradation or rejection via anodic oxidation or cathodic repulsion. Despite their advances, electrochemical membranes or electrocatalysts often suffer from corrosion or passivation, especially under strong electrode potentials or reactions. Moreover, the formation of toxic byproducts, such as chlorinated organic compounds and oxyhalides (e.g., ClO4 –) is another major concern. This study investigated the membrane aging processes of two types of conductive membranes, multiwalled carbon nanotubes (MWCNTs) and ferrite/graphitic carbon nitride hybrids (Fe3O4@g-C3N4) coated on ceramic membranes. Under high current densities (∼20 mA·cm–2) with anodic potentials (∼10 V), MWCNTs and Fe3O4@g-C3N4 catalysts underwent evident oxidation as indicated by an increase of the intensity ratio of the Raman spectral bands (I D/I G) and charge transfer resistance (R ct) of two electrochemical membranes. Under variations of electrode potentials, chloride or bromide were shown to be oxidized to bromate (BrO3 –) and chlorate (ClO3 –) at levels of 1–10 mmol·L–1. The formation of BrO3 – and ClO3 – was dependent on the solution pH, current densities (1–20 mA·cm–2), and initial concentrations of Br or Cl ions. To warrant a safe and rational design and operation of electrochemically reactive membrane processes, membrane aging and toxic byproduct’s formation deserve careful characterization under relevant water filtration environments.

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“…Antibiotics are widely manufactured to protect humans and animals from various infectious diseases . However, antibiotic residues present in drinking water can cause serious problems in the environment and human health. − Most antibiotics are stable; therefore, decomposing them using conventional treatment methods is challenging. , Thus, developing an effective degradation technique to eliminate antibiotic residues is crucial. Peroxymonosulfate (PMS)-based advanced oxidation process (AOP) typically involves the activation of PMS to produce active species, such as sulfate (SO 4 •– ), hydroxyl (HO • ), and superoxide (O 2 •– ) radicals and singlet oxygen ( 1 O 2 ), which can decompose antibiotics into substances with low/no toxicity. ,− PMS activation can be achieved using different methods, such as transition-metal catalysis, heating, ultrasound application, and ultraviolet (UV) and plasma irradiation. ,− …”

Section: Introductionmentioning

confidence: 99%

Surface Nitrogen-Doped Carbon Decoration of Co Catalyst Supported on Mesoporous Carbon to Boost Peroxymonosulfate Activation for Antibiotics Degradation

Shao

Guo

Wang

et al. 2022

Ind. Eng. Chem. Res.

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Peroxymonosulfate (PMS)-based advanced oxidation process has been demonstrated as an effective solution to degrade antibiotics present in wastewater. Developing robust catalysts is the key to boost PMS activation for reactive species generation. Herein, a surface nitrogen-doped carbon (NC) decoration strategy is proposed to reconstruct Co catalysts supported on mesoporous carbon (MC) for boosting PMS activation to degrade tetracycline hydrochloride (TCH). High-resolution transmission electron microscopy and N2 sorption isotherm measurements confirmed that some Co nanoparticles supported on MC could migrate and get stabilized on the surface of the NC layer during high-temperature carbonization. X-ray photoelectron spectroscopy analysis indicates the formation of various active sites (including Co–N x , graphitic N, and lattice oxygen) after surface NC decoration. These sites facilitate PMS activation and TCH degradation. The Co/MC@NC-900 catalyst (prepared at a carbonization temperature of 900 °C) exhibited the highest degradation performance (∼100% TCH removal efficiency in 12 min and apparent degradation rate constant of >0.25 min–1), outperforming the control Co/MC catalyst (∼55% TCH removal and degradation rate constant of ∼0.12 min–1). Mechanism studies confirmed the coexistence of radical and nonradical degradation pathways in the system under study. Particularly, Co/MC@NC-900 enables SO4 •–, •OH, and 1O2 formation simultaneously, thus exhibiting considerably improved TCH degradation efficiency. The proposed surface NC decoration strategy could enable the development of robust catalysts toward efficient PMS activation for antibiotic degradation.

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On-site H2O2 electro-generation process combined with ultraviolet: A promising approach for odorous compounds purification in drinking water system

Cited by 28 publications

References 55 publications

Boosting Fenton-like Catalysis via Electron Tunneling-Based C–Co Charge-Transfer Bridge in Nitrogen-Doped Cobalt@Carbon Nanotube-Grafted Carbon Polyhedron

Boosting Fenton-like Catalysis via Electron Tunneling-Based C–Co Charge-Transfer Bridge in Nitrogen-Doped Cobalt@Carbon Nanotube-Grafted Carbon Polyhedron

Electrochemical Aging and Halogen Oxides Formation on Multiwalled Carbon Nanotubes and Fe₃O₄@g-C₃N₄ Coated Conductive Membranes

Surface Nitrogen-Doped Carbon Decoration of Co Catalyst Supported on Mesoporous Carbon to Boost Peroxymonosulfate Activation for Antibiotics Degradation

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On-site H2O2 electro-generation process combined with ultraviolet: A promising approach for odorous compounds purification in drinking water system

Cited by 28 publications

References 55 publications

Boosting Fenton-like Catalysis via Electron Tunneling-Based C–Co Charge-Transfer Bridge in Nitrogen-Doped Cobalt@Carbon Nanotube-Grafted Carbon Polyhedron

Boosting Fenton-like Catalysis via Electron Tunneling-Based C–Co Charge-Transfer Bridge in Nitrogen-Doped Cobalt@Carbon Nanotube-Grafted Carbon Polyhedron

Electrochemical Aging and Halogen Oxides Formation on Multiwalled Carbon Nanotubes and Fe3O4@g-C3N4 Coated Conductive Membranes

Surface Nitrogen-Doped Carbon Decoration of Co Catalyst Supported on Mesoporous Carbon to Boost Peroxymonosulfate Activation for Antibiotics Degradation

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Electrochemical Aging and Halogen Oxides Formation on Multiwalled Carbon Nanotubes and Fe₃O₄@g-C₃N₄ Coated Conductive Membranes