A mini review of MOFs derived multifunctional absorbents: From perspective of components regulation

Materials Today Physics, Journal Year: 2023, Volume and Issue: 36, P. 101178 - 101178

Published: July 21, 2023

Language: Английский

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MOF‐Based Electromagnetic Shields Multiscale Design: Nanoscale Chemistry, Microscale Assembly, and Macroscale Manufacturing

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(43)

Published: June 8, 2023

Abstract The effects of electromagnetic (EM) radiation have received increased attention, closely associated with the widespread use electronics and wireless communication. A significant development in area is recent adoption metal‐organic frameworks (MOFs) to effectively enable interference (EMI) shielding. MOF tunable molecular scaffold architecture offers numerous pathways generate customizable magnetic electrical properties, which are prerequisite materials characteristics for efficient EMI shielding performance. Their flexibility terms structural design, accompanied by high porosity large specific surface area, makes MOFs excellent candidates shield EM waves at multiple scales. Herein, crucial role molecular‐, nano‐, micro‐, macro‐scale design reviewed accordance performance MOFs. current strategies MOF‐based shields systematically outlined, mechanisms also expounded based on their features. factors that hinder utilization functional MOF‐derived examined. Future research directions unveiled rational next‐generation address pressing concerns.

Language: Английский

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Designing flower-like MOFs-derived N-doped carbon nanotubes encapsulated magnetic NiCo composites with multi-heterointerfaces for efficient electromagnetic wave absorption

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 646, P. 265 - 274

Published: May 12, 2023

Language: Английский

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Heterostructure design of 3D hydrangea-like Fe3O4/Fe7S8@C core-shell composite as a high-efficiency microwave absorber

Carbon, Journal Year: 2023, Volume and Issue: 210, P. 118043 - 118043

Published: April 28, 2023

Language: Английский

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Atomic Tuning in Electrically Conducting Bimetallic Organic Frameworks for Controllable Electromagnetic Wave Absorption

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(45)

Published: July 19, 2023

Abstract Due to the structural complexity and limited controllability of conventional microwave‐absorption materials (MAMs), precise regulation atomically‐resolved structures properties MAMs remains a significant challenge. The interpretation dielectric loss mechanism is usually conduction polarization losses, while absence components‐regulated template further hinders disclosure mechanism. Herein, based on customizable functionality MOF platform, series pristine bimetallic MOFs with controllable conductivity are successfully constructed through alloying strategy. attributed alteration free‐carrier concentration subtle difference interlayer displacement or spacing, both which originate from atomic tuning hetero‐metal. Notably, Cu 1.3 Ni 1.7 (HITP) 2 features an ultra‐high absorption strength (reflection loss, RL = −71.5 dB) ultra‐wide maximum bandwidth (6.16 GHz) at only 15% filling, ranked in upper range all reported MAMs. metal co‐synergies, possesses switchable high peak wide (4–18 GHz). This work opens up avenue for tailoring new MOF‐based electromagnetic wave absorbers provides conceptually novel platform.

Language: Английский

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Dual‐Step Redox Engineering of 2D CoNi‐Alloy Embedded B, N‐Doped Carbon Layers Toward Tunable Electromagnetic Wave Absorption and Light‐Weight Infrared Stealth Heat Insulation Devices

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(30)

Published: May 1, 2024

Abstract 2D layered metallic graphite composites are promising electromagnetic wave absorption materials (EWAMs) for their combined properties of abundant interlayer free spaces, rich polarized sites, and high conductivity, but the controllable synthesis remains rather challenging. Herein, a dual‐step redox engineering strategy is developed by employing cobalt boron imidazolate framework (Co‐BIF) to construct CoNi‐alloy embedded B, N‐doped carbon layers (2D‐CNC) as EWAM. In first step, chemical etching oxidation process on Co‐BIF used obtain an optimized 2D‐CoNi‐layered double hydroxide (2D‐CoNi‐LDH) intermediate in second, high‐temperature calcination reduction implemented modify graphitization degree 2D‐CNC. The obtained sample delivers superior reflection loss (RL min ) −60.1 dB wide effective bandwidth (EAB) 6.24 GHz. synergy mechanisms interfacial/dipole polarization magnetic coupling in‐depth evidenced hologram Lorentz electron microscopy, revealing its significant contribution multireflection impedance matching. Further theoretical evaluation COMSOL simulation different fields based dynamic toward test ring reveals situ EW attenuation process. This work presents develop multifunctional light‐weight infrared stealthy aerogel with pressure‐resistant, anti‐corrosion, heat‐insulating future applications.

Language: Английский

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Perspectives on metal-organic framework-derived microwave absorption materials

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 214, P. 37 - 52

Published: July 14, 2024

Language: Английский

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Advances in electrochemistry of intrinsic conductive metal-organic frameworks and their composites: Mechanisms, synthesis and applications

Nano Energy, Journal Year: 2024, Volume and Issue: 122, P. 109333 - 109333

Published: Jan. 25, 2024

Language: Английский

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Graphene aerogel encapsulated double carbon shell CoFe@C@C nanocubes for construction of high performance microwave absorbing materials

Carbon, Journal Year: 2024, Volume and Issue: 224, P. 119081 - 119081

Published: March 25, 2024

Language: Английский

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Doped Porous Carbon Spheres with Controllable Vesicle Structure: Preparation and the Effects of Pore Size on Electromagnetic Wave Absorption Properties

Small, Journal Year: 2024, Volume and Issue: unknown

Published: May 16, 2024

Abstract This work reports on the preparation of uniform vesicle‐structural carbon spheres doped with heteroatoms N, P, and S, pore sizes strictly controlled by hard templates monodisperse submicron SiO 2 spheres. The uniformly vesicular microspheres are obtained in three steps: Stöber hydrolysis for ; situ polymerization immobilization; alkaline etching after carbonization. size vesicles can be easily adjusted regulating particle spheres, which has a significant effect its electromagnetic wave (EMW) absorption performance. Compared 180 480 nm, when vesicle aperture is 327 only 5.5 wt.% filling load 1.9 mm thickness, material shows best EMW behavior effective bandwidth (EAB) covers entire Ku band (6.32 GHz) minimum reflection loss (RL min ) −36.10 dB, suggesting optimized significantly improve overall impedance matching achieve broadband absorption. paves way enhancement properties porous optimizing apertures while maintaining their composition.

Language: Английский

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