In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 21, 2024

Abstract Zeolite imidazole‐based framework (ZIF‐67), a notable class of metal–organic frameworks (MOFs), shows promise in activating peroxymonosulfate (PMS) for pollutant degradation due to its uniformly distributed cobalt ions. However, nanoparticle form and the elution ions during use cause challenges recycling risk secondary pollution. In this study, magnetic core‐shell hydrogen‐bonded organic (HOF) on MOF (HOF‐on‐Fe 3 O 4 /ZIF‐67) is successfully prepared. The porous HOF shell not only protects active sites mitigates ion leaching but also reduces mass transfer limitations, ensuring sustained catalytic performance. Fe core enhances electron between ions, boosts efficiency, facilitates easy separation recycling. This structure effectively activates PMS, achieving 100% removal Rhodamine B, model wastewater dye, within 10 min (Rh B = 50 mg L −1 , HFZ 150 PMS 1.5 m pH 7, room temperature). Furthermore, under protection shell, minimized negligible value (0.14 ) after 5 cycles use. research provides fresh perspectives into development composite materials with improved performance recyclability treatment.

Language: Английский

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Advantages of ZIFs coated core-shell catalyst in activating persulfate to degrade antibiotics: free radical identification and surface collision pathway mechanism

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145328 - 145328

Published: March 1, 2025

Language: Английский

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Rational Design of Core–Shell MoS2@ZIF-67 Nanocomposites for Enhanced Photocatalytic Degradation of Tetracycline

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(7), P. 545 - 545

Published: April 3, 2025

Zeolitic imidazolate frameworks (ZIFs) and their composites are attractive materials for photocatalytic applications due to distinct characteristics. Core–shell ZIFs have lately emerged as a particularly appealing type of metal–organic frameworks, with improved light-absorption charge-separation capabilities. In this study, hybrid nanocomposite comprising zeolitic framework-67 molybdenum disulfide (MoS2) were fabricated core–shell structure. The prepared MoS2@ZIF-67 nanocomposites studied using XRD, FTIR, XPS, HR-TEM techniques. crystalline nature the presence characteristic functional groups analyzed XRD respectively. degradation antibiotic tetracycline (TC) was measured visible light irradiation. Compared pristine MoS2 (12%) ZIF-67 (34%), most active (72%) exhibited greater efficacy.

Language: Английский

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Construction of Z-Scheme ZIF67/NiMoO4 Heterojunction for Enhanced Photocatalytic Degradation of Antibiotic Pollutants

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6225 - 6225

Published: Dec. 20, 2024

The rational design of heterojunction photocatalysts enabling fast transportation and efficient separation photoexcited charge carriers is the key element in visible light-driven photocatalyst systems. Herein, we develop a unique Z-scheme consisting NiMoO4 microflowers (NMOF) ZIF67, referred to as ZINM (composite), for purpose antibiotic degradation. ZIF67 was produced by solution process, whereas NMOF synthesized via coprecipitation with glycine surfactant. exhibited monoclinic phase highly oriented, interconnected sheet-like morphology. showed better optical transfer characteristics than its constituents, NiMoO4. Consequently, developed superior photocatalytic redox capability; ZINM30 (the composite 30 wt.% loaded) could degrade 91.67% tetracycline 86.23% norfloxacin within 120 min. This enhanced activity attributable reduced bandgap (Egap = 2.01 eV), morphology, high specific surface area (1099.89 m2/g), intimate contact between NiMoO4, which facilitated establishment heterojunction. Active species trapping tests verified that •O2− h+ were primary species, supporting proposed degradation mechanism. work highlights valid ZIF67/NiMoO4 system carrier and, therefore, antibiotics.

Language: Английский

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Peroxymonosulfate activation by cobalt-doped ferromanganese magnetic oxides through singlet oxygen and radical pathways for efficient sulfadiazine degradation

RSC Advances, Journal Year: 2024, Volume and Issue: 14(31), P. 22195 - 22208

Published: Jan. 1, 2024

Mechanistic diagram of the activation PMS degradation SDZ by magnetic cobalt-doped ferromanganese oxide (CMFO-0.4) through singlet oxygen and radical pathways.

Language: Английский

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Novel and reusable magnetic MOF nanocomposite coupled ionic liquid- promoted efficient chemical fixation of CO2 into α-alkylidene cyclic carbonates

Journal of Saudi Chemical Society, Journal Year: 2024, Volume and Issue: 28(6), P. 101950 - 101950

Published: Oct. 12, 2024

Language: Английский

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