Ultrahigh Peroxymonosulfate Utilization Efficiency over CuO Nanosheets via Heterogeneous Cu(III) Formation and Preferential Electron Transfer during Degradation of Phenols

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(12), P. 8984 - 8992

Published: May 31, 2022

In persulfate activation by copper-based catalysts, high-valent copper (Cu(III)) is an overlooked reactive intermediate that contributes to efficient utilization and organic pollutant removal. However, the mechanisms underlying heterogeneous enhanced are not fully understood. Here, oxide (CuO) nanosheets (synthesized with a facile precipitation method) exhibited high catalytic activity for peroxymonosulfate (PMS) 100% 4-chlorophenol (4-CP) degradation within 3 min. Evidence critical role of surface-associated Cu(III) on PMS 4-CP over wide pH range (pH 3-10) was obtained using in situ Raman spectroscopy, electron paramagnetic resonance, quenching tests. directly oxidized other phenolic pollutants, rate constants inversely proportional their ionization potentials. preferentially oxidizes rather than react two molecules generate one molecule 1O2, thus minimizing this less pathway. Accordingly, much higher efficiency (77% electrons accepted ascribed mineralization) CuO/PMS radical pathway-dominated Co3O4/PMS system (27%) or 1O2 α-MnO2/PMS (26%). Overall, these results highlight potential benefits via oxidation offer mechanistic insight into ultrahigh

Language: Английский

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Oxygen vacancies-enriched Cu/Co bimetallic oxides catalysts for high-efficiency peroxymonosulfate activation to degrade TC: Insight into the increase of Cu+ triggered by Co doping

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 450, P. 138302 - 138302

Published: July 25, 2022

Language: Английский

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Fe-Mn oxycarbide anchored on N-doped carbon for enhanced Fenton-like catalysis: Importance of high-valent metal-oxo species and singlet oxygen

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123204 - 123204

Published: Aug. 22, 2023

Language: Английский

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Generation and identification of 1O2 in catalysts/peroxymonosulfate systems for water purification

Water Research, Journal Year: 2023, Volume and Issue: 245, P. 120614 - 120614

Published: Sept. 11, 2023

Language: Английский

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Facet-dependent CuO/{010}BiVO4 S-scheme photocatalyst enhanced peroxymonosulfate activation for efficient norfloxacin removal

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 174, P. 30 - 43

Published: May 19, 2023

Language: Английский

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Petal-like CuCo2O4 spinel nanocatalyst with rich oxygen vacancies for efficient PMS activation to rapidly degrade pefloxacin

Separation and Purification Technology, Journal Year: 2022, Volume and Issue: 291, P. 120933 - 120933

Published: March 26, 2022

Language: Английский

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Homogeneous/heterogeneous metal-catalyzed persulfate oxidation technology for organic pollutants elimination: A review

Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(3), P. 109586 - 109586

Published: Feb. 28, 2023

Language: Английский

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Selective activation of peroxymonosulfate govern by B-site metal in delafossite for efficient pollutants degradation: Pivotal role of d orbital electronic configuration

Water Research, Journal Year: 2023, Volume and Issue: 236, P. 119957 - 119957

Published: April 8, 2023

Language: Английский

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Precise coordination of high-loading Fe single atoms with sulfur boosts selective generation of nonradicals

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(4)

Published: Jan. 17, 2024

Nonradicals are effective in selectively degrading electron-rich organic contaminants, which unfortunately suffer from unsatisfactory yield and uncontrollable composition due to the competitive generation of radicals. Herein, we precisely construct a local microenvironment carbon nitride–supported high-loading (~9 wt.%) Fe single-atom catalyst (Fe SAC) with sulfur via facile supermolecular self-assembly strategy. Short-distance S coordination boosts peroxymonosulfate (PMS) activation generates high-valent iron–oxo species IV =O) along singlet oxygen ( 1 O 2 ), significantly increasing yield, PMS utilization, p -chlorophenol reactivity by 6.0, 3.0, 8.4 times, respectively. The nonradicals is controllable simply changing content. In contrast, long-distance both radicals nonradicals, could not promote reactivity. Experimental theoretical analyses suggest that short-distance upshifts d -band center atom, i.e., being close Fermi level, changes binding mode between atom site generate =O high yield. S-coordinated SAC exhibits excellent application potential various water matrices. These findings can guide rational design robust SACs toward selective utilization.

Language: Английский

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Photocatalysis toward Microplastics Conversion: A Critical Review

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(11), P. 8694 - 8719

Published: May 20, 2024

Microplastics (MPs, particle size < 5 mm) have become increasingly ubiquitous on Earth due to the cleavage and degradation of heavy use plastics. MPs recently been reported be detected in human blood, alveoli, breast milk, embryos, other organs, raising concerns about their environmental risks. Photocatalysis has identified as a potential means for conversion, which utilizes solar energy stimulate semiconductor photocatalyst. However, study photocatalytic conversion is still incubation period. This review overviews current state-of-the-art technologies conversion. Then, fundamental principles, challenges, analytical techniques, evaluation indexes reforming are highlighted. We systematically summarized recent advances key factors influencing performance. Finally, we propose some perspectives developing efficient systems MPs. will provide guideline applying technology MPs, significantly contribute this emerging research field.

Language: Английский

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