Microenvironment modulation of cobalt single-atom catalysts for boosting both radical oxidation and electron-transfer process in Fenton-like system

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 329, P. 122558 - 122558

Published: March 2, 2023

Language: Английский

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Fenton-like activity and pathway modulation via single-atom sites and pollutants comediates the electron transfer process

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(3)

Published: Jan. 8, 2024

The studies on the origin of versatile oxidation pathways toward targeted pollutants in single-atom catalysts (SACs)/peroxymonosulfate (PMS) systems were always associated with coordination structures rather than perspective pollutant characteristics, and analysis mechanism commonality is lacking. In this work, a variety (M-SACs, M: Fe, Co, Cu) fabricated via pyrolysis process using lignin as complexation agent substrate precursor. Sixteen kinds commonly detected various references selected, their ln k obs values M-SACs/PMS correlated well ( R 2 = 0.832 to 0.883) electrophilic indexes (reflecting electron accepting/donating ability pollutants) energy gap 0.801 0.840) between complexes. Both transfer (ETP) radical can be significantly enhanced systems, while was overwhelmed by ETP lower indexes. contrast, higher represented weaker electron-donating capacity complexes, which resulted accompanied noticeable oxidation. addition, different regulated gaps complexes pollutants. As result, Fenton-like activities could modulated reaction pathways, determined both sites. This work provided strategy establish PMS-based AOP tunable capacities for high-efficiency organic decontamination.

Language: Английский

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Selective degradation of organic micropollutants by activation of peroxymonosulfate by Se@NC: Role of Se doping and nonradical pathway mechanism

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 452, P. 131202 - 131202

Published: March 15, 2023

Language: Английский

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Redox potentials of pollutants determining the dominate oxidation pathways in manganese single-atom catalyst (Mn-SAC)/peroxymonosulfate system: Selective catalytic mechanisms for versatile pollutants

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 338, P. 123029 - 123029

Published: June 24, 2023

Language: Английский

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High-loading of well dispersed single-atom catalysts derived from Fe-rich marine algae for boosting Fenton-like reaction: Role identification of iron center and catalytic mechanisms

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 336, P. 122951 - 122951

Published: June 2, 2023

Language: Английский

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Ferrate(VI)/Periodate System: Synergistic and Rapid Oxidation of Micropollutants via Periodate/Iodate-Modulated Fe(IV)/Fe(V) Intermediates

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(17), P. 7051 - 7062

Published: April 19, 2023

The presence of organic micropollutants in water sources worldwide has created a need for the development effective and selective oxidation methods complex matrices. This study is first report combination ferrate(VI) (Fe(VI)) periodate (PI) synergistic, rapid, elimination multiple micropollutants. combined system was found to outperform other Fe(VI)/oxidant systems (e.g., H2O2, peroxydisulfate, peroxymonosulfate) rapid decontamination. Scavenging, probing, electron spin resonance experiments showed that high-valent Fe(IV)/Fe(V) intermediates, rather than hydroxyl radicals, superoxide singlet oxygen, iodyl played dominant role process. Further, generation evidenced directly by 57Fe Mössbauer spectroscopic test. Surprisingly, reactivity PI toward Fe(VI) low (0.8223 M-1 s-1) at pH 8.0, implying not acting as an activator. Besides, only iodine sink PI, iodate also enhanced micropollutant abatement oxidation. Further proved and/or might function ligands, causing utilization efficiency intermediates pollutant outcompete their auto-decomposition. Finally, oxidized products plausible transformation pathways three different single Fe(VI)/PI were characterized elucidated. Overall, this proposed novel strategy (i.e., system) could efficiently eliminate clarified unexpected interactions between PI/iodate accelerated

Language: Английский

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Electrochemical activation of periodate with graphite electrodes for water decontamination: Excellent applicability and selective oxidation mechanism

Water Research, Journal Year: 2023, Volume and Issue: 240, P. 120128 - 120128

Published: May 25, 2023

Language: Английский

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Ultrafast oxidation of refractory organics via PMS activation by Si-O doped biomimetic montmorillonite: Simultaneous enhanced radical/electron transfer pathways and efficient catalytic membrane system

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 342, P. 123428 - 123428

Published: Oct. 24, 2023

Language: Английский

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Simultaneous generation of free radicals, Fe(IV) and Fe(V) by ferrate activation: A review

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148669 - 148669

Published: Jan. 9, 2024

Language: Английский

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Roles of Iron (V) and Iron (IV) Species in Ferrate-Triggered Oxidation of Phenolic Pollutants and Their Transformation Induced by Phenoxyl Radical

Water Research, Journal Year: 2025, Volume and Issue: 274, P. 123133 - 123133

Published: Jan. 11, 2025

Language: Английский

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