Covalent Organic Framework Nanoarchitectonics: Recent Advances for Precious Metal Recovery

Advanced Materials, Год журнала: 2024, Номер 36(33)

Опубликована: Июнь 19, 2024

The recovery of precious metals (PMs) from secondary resources has garnered significant attention due to environmental and economic considerations. Covalent organic frameworks (COFs) have emerged as promising adsorbents for this purpose, owing their tunable pore size, facile functionalization, exceptional chemical stability, large specific surface area. This review provides an overview the latest research progress in utilizing COFs recover PMs. Firstly, design synthesis strategies chemically stable COF-based materials, including pristine COFs, functionalized composites, are delineated. Furthermore, application gold, silver, platinum group elements is delved into, emphasizing high adsorption capacity selectivity well recycling ability. Additionally, various interaction mechanisms between PM ions analyzed. Finally, current challenges faced by field discussed, potential directions future development proposed, enhancing recyclability reusability COF materials realizing PMs actual acidic wastewater. With targeted can be realized more economically efficiently future.

Язык: Английский

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Efficient Capture of Pb (II) Ions From Aqueous Solutions Using Metal Organic Frameworks@Covalent Organic Framework Composites With Abundant Carboxyl Groups

Applied Organometallic Chemistry, Год журнала: 2025, Номер 39(2)

Опубликована: Янв. 12, 2025

ABSTRACT The development of efficient adsorbents with high selectivity is essential for mitigating environmental pollution. This study introduces a novel adsorbent comprising metal–organic framework (i.e., MIL‐101(Fe)‐NH 2 ) and covalent organic (COF) enriched carboxyl groups, which designated /COF‐COOH. synthesized through Schiff base reaction followed by carboxymethylation subsequently employed Pb (II) adsorption. structure /COF‐COOH confirmed using various characterization techniques, including Fourier transform infrared spectroscopy, scanning electron microscopy, X‐ray diffraction, thermogravimetric analysis, Brunauer, Emmett, Teller surface area analysis. adsorption capacity (q e value estimated batch experiments . effects several factors, pH, dosage, contact time, concentration, solution ionic strength, temperature, on the process are systematically assessed. achieves highest 184 mg/g at pH 6. kinetics, isotherms, thermodynamics indicate that occur spontaneous monolayer chemical process. Moreover, displays remarkable anti‐interference capability, its q decreases only 10% after 10 cycles. Based results, mechanism determined to be primarily electrostatic chelation interactions between O‐ N‐containing functional groups. Thus, this highly recyclable exhibits considerable potential removing from aquatic ecosystems.

Язык: Английский

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Surface curvature-driven adsorption-reduction mechanism over hollow N-doped carbon enhances recovery of precious metal ions from wastewater

Environmental Research, Год журнала: 2025, Номер unknown, С. 120914 - 120914

Опубликована: Янв. 1, 2025

Язык: Английский

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Cross-material synergies of carbon nanomaterials, MOFs, and COFs: Innovative approaches for sustainable environmental remediation and resource recovery

Coordination Chemistry Reviews, Год журнала: 2025, Номер 535, С. 216669 - 216669

Опубликована: Март 29, 2025

Язык: Английский

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Engineered covalent organic frameworks (COFs) for adsorption-based metal separation technologies: A critical review

Advances in Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 103507 - 103507

Опубликована: Апрель 1, 2025

Язык: Английский

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Schiff Bases Derived from Pyridoxal 5′-Phosphate and 2-X-Phenylamine (X = H, OH, SH): Substituent Effects on UV-Vis Spectra and Hydrolysis Kinetics

Molecules, Год журнала: 2024, Номер 29(15), С. 3504 - 3504

Опубликована: Июль 26, 2024

Schiff bases are compounds that widely distributed in nature and have practical value for industry biomedicine. Another important use of is identifying metal ions different molecules, including proteins. Their proneness to hydrolysis limits the utilization mainly non-aqueous solutions. However, by introducing -OH -SH substituents aromatic amine-bearing rings, it possible increase resilience base destruction water. The present paper discusses how hydroxyl or thiol group influences spectral properties kinetics formation derived from pyridoxal 5'-phosphate aniline, 2-hydroxyaniline, 2-mercaptoaniline using quantum chemical data. variation between imines can be explained taking into account geometry frontier molecular orbital alteration induced substituents. changes rate analyzed computed values local reactivity indices.

Язык: Английский

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Recovery of precious metals from aqua regia leachate of E-wastes using dithiocarbamate-modified cellulose and development of novel kinetic model

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 157040 - 157040

Опубликована: Окт. 1, 2024

Язык: Английский

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Directed Coordination of C/N-Termini of Cyano Group in Metal Hexacyanoferrates to Efficient Palladium Recovery: Enhanced Adsorption Affinity and Selectivity

Environmental Research, Год журнала: 2024, Номер unknown, С. 120581 - 120581

Опубликована: Дек. 1, 2024

Язык: Английский

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