Recent advances in the applications of encapsulated transition-metal nanoparticles in advanced oxidation processes for degradation of organic pollutants: A critical review

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 342, P. 123401 - 123401

Published: Oct. 18, 2023

Language: Английский

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A multiple Kirkendall strategy for converting nanosized zero-valent iron to highly active Fenton-like catalyst for organics degradation

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(39)

Published: Sept. 19, 2023

Nanosized zero-valent iron (nZVI) is a promising persulfate (PS) activator, however, its structurally dense oxide shell seriously inhibited electrons transfer for O-O bond cleavage of PS. Herein, we introduced sulfidation and phosphorus-doped biochar breaking the pristine with formation FeS FePO 4 -containing mixed shell. In this case, faster diffusion rate atoms compared to components triggered multiple Kirkendall effects, causing inward fluxion vacancies further coalescing into radial nanocracks. Exemplified by trichloroethylene (TCE) removal, such unique “lemon-slice-like” nanocrack structure favored fast outward ferrous ions across PS activation high-efficient generation utilization reactive species, as evidenced effective dechlorination (90.6%) mineralization (85.4%) TCE. O 2 • - contributed most TCE decomposition, moreover, SnZVI@PBC gradually became electron-deficient thus extracted from achieving nonradical-based degradation. Compared nZVI/PS process, SnZVI@PBC/PS system could significantly reduce catalyst dosage (87.5%) amount (68.8%) achieve nearly complete degradation, was anti-interference, stable, pH-universal. This study advanced mechanistic understandings effects-triggered on nZVI corresponding rational design Fenton-like catalysts organics

Language: Английский

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Dynamic active-site induced by host-guest interactions boost the Fenton-like reaction for organic wastewater treatment

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 15, 2023

In heterogeneous catalysis, uncovering the dynamic evolution of active sites in working conditions is crucial to realizing increased activity and enhanced stability catalyst Fenton-like activation. Herein, we capture changes unit cell Co/La-SrTiO3 during exemplary peroxymonosulfate activation process using X-ray absorption spectroscopy situ Raman spectroscopy, revealing substrate tuned its structural evolution, which reversible stretching vibration O-Sr-O Co/Ti-O bonds different orientations. This effectively promotes generation key SO5* intermediates, beneficial formation 1O2 SO4•- from persulfate on Co site. Density functional theory show that optimized distortion metal-oxygen bond strength by tuning eg orbitals number transferred electrons about 3-fold, achieving excellent efficiency removing organic pollutants.

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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CeO2 nanosheets with anion-induced oxygen vacancies for promoting photocatalytic toluene mineralization: Toluene adsorption and reactive oxygen species

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 317, P. 121694 - 121694

Published: July 2, 2022

Language: Английский

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Single-atom co sites confined in layered double hydroxide for selective generation of surface-bound radicals via peroxymonosulfate activation

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123218 - 123218

Published: Aug. 25, 2023

Selective production of specific radical species with prolonged lifetime is challenging in advanced oxidation process. Herein, we constructed single-atom Co (SA-Co) catalytic sites confined layered double hydroxide (LDH) for selectively and sustainably generate via peroxymonosulfate (PMS) activation. The negatively charged PMS was stabilized by the positively LDH simultaneously activated nanoconfined sites, resulting oriented-production surface-bonded •OH SO4•− radicals long-term efficiency (up to 48 h), suppressed decomposition self-quenching. Ion competition experiments in-situ spectroscopic studies were applied monitor activation processes. SA-Co-LDH/PMS system outperforms benchmark homogeneous (Co2+/PMS) heterogeneous (Co3O4/PMS) systems degradation emerging organic contaminants (EOCs) lowest consumption highest efficiency.

Language: Английский

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Enhanced Interfacial Electron Transfer by Asymmetric Cu‐O_v‐In Sites on In₂O₃ for Efficient Peroxymonosulfate Activation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(11)

Published: Jan. 17, 2023

Enhancing the peroxymonosulfate (PMS) activation efficiency to generate more radicals is vital promote Fenton-like reaction activity, however, how PMS adsorption and accelerate interfacial electron transfer boost its kinetics remains a great challenge. Herein, we prepared Cu-doped defect-rich In2 O3 (Cu-In2 /Ov ) catalysts containing asymmetric Cu-Ov -In sites for in water purification. The intrinsic catalytic activity that side-on configuration of O-O bond (Cu-O-O-In) at significantly stretches length. Meanwhile, increase density near Fermi energy level, promoting faster generating SO4 ⋅- ⋅OH. degradation rate constant tetracycline achieved by Cu-In2 31.8 times than , it shows possibility membrane reactor practical wastewater treatment.

Language: Английский

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Catalysis Enhancement of Co₃O₄ through the Epitaxial Growth of Inert ZnO in Peroxymonosulfate Activation: The Catalytic Mechanism of Surface Hydroxyls in Singlet Oxygen Generation

Crystal Growth & Design, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 16, 2024

As a prevalent Co-contained catalyst, modified Co3O4 has been widely utilized to activate peroxymonosulfate (PMS) for organic wastewater treatment due its affordability and accessibility. While the catalysis enhancement of by catalytic inert species is often attributed formation oxygen vacancies (OVs), underlying mechanism beyond OVs remains unclear. Herein, we designed one-pot pyrolysis process synthesize ZnO/Co3O4 heterojunctions featuring Zn–Co tetrahedral coordination on their interface. In PMS-advanced oxidation methylene blue (MB), epitaxial growth ZnO surface led an 88-fold increase in activity, facilitating rapid degradation dyes achieve deep mineralization effluent. Co sites hydroxyls played crucial role PMS activation, generating variety reactive species. Among these species, singlet (1O2) was identified as dominant responsible MB degradation, with assistance sulfate radical. Theoretical calculations demonstrated that Zn–OH group easier than Co–OH through polarization during chemisorption. The activated groups served novel active sites, participating activation nonradical way generate partial 1O2. This study sheds new light effect (ZnO) enhancing activity Co3O4, refining our understanding generation route 1O2 activation.

Language: Английский

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Applications of vacancy defect engineering in persulfate activation: Performance and internal mechanism

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 449, P. 130971 - 130971

Published: Feb. 10, 2023

Language: Английский

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Mineral Modulated Single Atom Catalyst for Effective Water Treatment

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(16)

Published: Jan. 7, 2022

Abstract Single atom catalysts (SACs) have been growing as an emerging “hot” topic in environmental remediation. Their performance can be rationally optimized via modulating spatial coordination configuration and the porous structure of SACs, which is still challenging. Herein, a novel Si, N co‐coordinated cobalt SAC (p‐CoSi 1 3 @D) with 3D free standing architecture tailored employing natural mineral (diatomite) Si source template. Theoretical calculations experimental analysis reveal that substitution by dramatically accelerates interaction electron transfer between peroxymonosulfate Co single center. Moreover, p‐CoSi @D inherits hierarchically diatomite, providing more accessible sites open diffusion channels for contaminants water treatment applications. Thanks to optimal architecture, serve highly active catalyst activation, turnover frequency 299.8 min −1 bisphenol A degradation, surpassing those transition metal SACs or oxides disclosed literature. This work provides strategy development wastewater reclamation, deepens understanding significant role templates SACs.

Language: Английский

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