Photocatalysis coupling with membrane technology for sustainable and continuous purification of wastewater

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 329, P. 125225 - 125225

Published: Sept. 28, 2023

Membrane separation and photocatalytic degradation are two important technologies for wastewater purification. However, practical applications hindered by membrane fouling in the low efficiency of photocatalysis. A promising solution lies fusion photocatalysis technology, capitalizing on their respective strengths addressing weaknesses. This comprehensive review endeavours to present a thorough examination recent advancements materials reactors treatment. Key facets encompass fundamentals photodegradation, contributions different light bands waste removal, various fabrication techniques diverse types reactors, optimization operational parameters. Notably, innovative incorporation emerging photothermal effect into technology has significantly augmented its longevity Furthermore, insightful commentary will be provided assess progress made utilizing this cutting-edge pollutant removal. Ultimately, paper conclude summarizing key findings challenges associated with integration these processes. The implementation advanced potential revolutionize conventional treatment, offering sustainable environmentally friendly approach large-scale

Language: Английский

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Dual‐Atomic‐Site Catalysts for Molecular Oxygen Activation in Heterogeneous Thermo‐/Electro‐catalysis

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(22)

Published: March 9, 2023

Efficient molecular oxygen activation (MOA) is the key to environmentally friendly catalytic oxidation reactions. In last decade, single-atomic-site catalysts (SASCs) with nearly 100 % atomic utilization and unique electronic structure have been widely investigated for MOA. However, single active site makes effect unsatisfactory difficult deal complex Recently, dual-atomic-site (DASCs) provided a new idea effective of (O2 ) due more diverse sites synergetic interactions among adjacent atoms. this review, we systematically summarized recent research progress DASCs MOA in heterogeneous thermo- electrocatalysis. Finally, look forward challenges application prospects construction

Language: Английский

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Understanding the role of transition metal single-atom electronic structure in oxysulfur radical-mediated oxidative degradation

Environmental Science and Ecotechnology, Journal Year: 2024, Volume and Issue: 20, P. 100405 - 100405

Published: Feb. 28, 2024

The ubiquity of refractory organic matter in aquatic environments necessitates innovative removal strategies. Sulfate radical-based advanced oxidation has emerged as an attractive solution, offering high selectivity, enduring efficacy, and anti-interference ability. Among many technologies, sulfite activation, leveraging its cost-effectiveness lower toxicity compared to conventional persulfates, stands out. Yet, the activation process often relies on transition metals, suffering from low atom utilization. Here we introduce a series single-atom catalysts (SACs) employing metals g-C3N4 substrates, effectively activating for acetaminophen degradation. We highlight superior performance Fe/CN, which demonstrates degradation rate constant significantly surpassing those Ni/CN Cu/CN. Our investigation into electronic spin polarization characteristics these reveals their critical role catalytic efficiency, with oxysulfur radical-mediated reactions predominating. Notably, under visible light, activity is enhanced, attributed increased generation radicals strengthened electron donation-back donation dynamic. proximity Fe/CN's d-band center Fermi level, alongside polarization, shown improve adsorption reduce HOMO-LUMO gap, thereby accelerating photo-assisted activation. This work advances understanding SACs environmental applications lays groundwork future water treatment technologies.

Language: Английский

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Local O ₂ concentrating boosts the electro-Fenton process for energy-efficient water remediation

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(11)

Published: March 6, 2024

The electro-Fenton process is a state-of-the-art water treatment technology used to remove organic contaminants. However, the low O

Language: Английский

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Overcome the trade-off in electro-fenton chemistry for in situ H2O2 generation-activation by tandem CoFe bimetallic single-atom configuration

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 357, P. 124320 - 124320

Published: June 20, 2024

Dual-atomic catalysts (DACs) demonstrated remarkable potential in addressing key challenges electro-Fenton (EF) processes. In this study, we synthesized an EF DACs comprising both CoN4 and FeN4 sites, which was achieved a high H2O2 generation rate (1.68 mM−1h−1) 100 % bisphenol A degradation efficiency via successive two-electron oxygen reduction one-electron Fenton reactions (2e− ORR + 1e− Fenton). Our findings indicated that the single-atom nitrogen coordination of sites plays crucial roles regulating adsorption intermediates *OOH *H2O2. The bimetallic independently regulated binding energies on (pyrrole-type) for favorable its subsequent activation adjacent (pyridine-type). Thus, dual-site engineering addresses trade-off situ generation-activation chemistry, realizing electron utilization fast pollutant toward efficient sustainable water treatment.

Language: Английский

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Site-designed dual-active-center catalysts for co-catalysis in advanced oxidation processes

npj Materials Sustainability, Journal Year: 2025, Volume and Issue: 3(1)

Published: Jan. 7, 2025

Abstract Advanced Oxidation Processes (AOPs) are promising for treating persistent pollutants, yet challenges arise due to the step-wise oxidants activation process, which traditional single-active-center catalysts struggle facilitate effectively. Recently, dual-active-center have emerged as a solution by enabling synergistic reactions. This review covers advances in these catalysts, their co-catalytic mechanisms, and applications electro-Fenton, photocatalytic, peroxymonosulfate-, pollutant-as-electron-donor based Fenton-like processes, along with active site design considerations future challenges.

Language: Английский

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Recent advances and challenges of double-atom catalysts in diverse environmental applications: A state-of-the-art review

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 532, P. 216545 - 216545

Published: Feb. 19, 2025

Language: Английский

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High-valent cobalt-oxo species triggers singlet oxygen for rapid contaminants degradation along with mild peroxymonosulfate decomposition in single Co atom-doped g-C3N4

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144531 - 144531

Published: June 30, 2023

Language: Английский

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Enhanced electrocatalytic cathodic degradation of 2,4-dichlorophenoxyacetic acid based on a synergistic effect obtained from Co single atoms and Cu nanoclusters

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 332, P. 122748 - 122748

Published: April 10, 2023

Language: Английский

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New Insights into Selective Singlet Oxygen Production via the Typical Electroactivation of Oxygen for Water Decontamination

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(44), P. 17123 - 17131

Published: Oct. 24, 2023

Selective production of singlet oxygen (1O2) as an electrophilic oxidant is crucial for the precise control chemical targets in environmental fields. Herein, we proposed a strategy to construct redox interface on electrodes, which can situ produce inorganic metal hydroperoxides with appropriate oxidative ability during activation. Benefiting from atomic Cu sites (CuN4) copper–carbon aerogel electrode, almost complete 1O2 was achieved, thereby refraining competitive formation other reactive species. The fast electron transfer rate between CuN4 and electrogenerated H2O2 promoted copper hydroperoxide (N4–Cu–OOH), selectively efficiently oxidizing intermediate O2•– 1O2. optimized up 2583 μmol L–1 without additional reagents. We further considered high removing electron-rich organic pollutants complex water matrix. Fast kinetics achieved various electron-donating substituents nonradical oxidation pathway. BPA degradation efficiency less susceptible coexisting natural matter (NOM) ions. Specifically, kinetic constant removal 34 times higher than that nanoparticle electrode while producing hydroxyl radical. Our findings highlight innovative interfacial surface engineering electrocatalytic O2 activation system generate future potential applications.

Language: Английский

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