Conductive Metal–Organic Frameworks with Tunable Dielectric Properties for Boosting Electromagnetic Wave Absorption

ACS Nano, Journal Year: 2023, Volume and Issue: 17(13), P. 12510 - 12518

Published: June 23, 2023

Metal-organic frameworks (MOFs) manifest enormous potential in promoting electromagnetic wave (EMW) absorption thanks to the tailored components, topological structure, and high porosity. Herein, rodlike conductive MOFs (cMOFs) composed of adjustable metal ions Zn, Cu, Co, or Ni ligands hexahydroxytriphenylene (HHTP) are prepared attain tunable dielectric properties for a EMW absorption. Specifically, influences cMOFs' composition, charge transport characteristic, crystalline anisotropy microstructure on performance ascertained, advancing understanding attenuation mechanisms MOFs. The boosted polarization losses derived from conjugation effects terminal groups, as well shape anisotropy, lead prominent cMOFs. Cu-HHTP confers minimum reflection loss (RLmin) -63.55 dB at thickness 2.9 mm maximum effective bandwidth 5.2 GHz. Moreover, Zn-HHTP showcases superiority S-band (2-4 GHz) with an RLmin -62.8 1.9 mm. This work not only hoists mechanistic structure-function relationships cMOFs but also offers guidelines preparing functional MOF materials.

Language: Английский

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RGO supported bimetallic MOFs-derived Co/MnO/porous carbon composite toward broadband electromagnetic wave absorption

Carbon, Journal Year: 2023, Volume and Issue: 205, P. 552 - 561

Published: Feb. 1, 2023

Language: Английский

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Progress of metal organic frameworks-based composites in electromagnetic wave absorption

Materials Today Physics, Journal Year: 2022, Volume and Issue: 30, P. 100950 - 100950

Published: Dec. 20, 2022

Language: Английский

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Ti3C2Tx MXene/graphene oxide/Co3O4 nanorods aerogels with tunable and broadband electromagnetic wave absorption

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 462, P. 142042 - 142042

Published: Feb. 22, 2023

Language: Английский

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A two-dimensional semiconductive Cu-S metal-organic framework for broadband microwave absorption

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 454, P. 140445 - 140445

Published: Nov. 16, 2022

Language: Английский

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MXene@Co hollow spheres structure boosts interfacial polarization for broadband electromagnetic wave absorption

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 176, P. 167 - 175

Published: Sept. 13, 2023

Language: Английский

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Inorganic–Organic Hybrid Dielectrics for Energy Conversion: Mechanism, Strategy, and Applications

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(28)

Published: April 28, 2023

Abstract Dielectric materials with higher energy storage and electromagnetic (EM) conversion are in high demand to advance electronic devices, military stealth, mitigate EM wave pollution. Existing dielectric for high‐energy‐storage electronics loss absorbers studied toward realizing these goals, each aligned the current global grand challenges. Libraries of desirable permittivity, loss, and/or breakdown strength potentially meeting device requirements reviewed here. Regardless, aimed at translating into oft‐encountered shortcomings can be caused by either two confluences: a) low strength; b) process complexity. Contextualizing aspects overarching objectives enabling high‐efficiency conversion, recent advances by‐design inorganic–organic hybrid here, a focus on design approaches, preparation methods, characterization techniques. In light their strengths weaknesses, potential strategies foster commercial adoption critically interrogated.

Language: Английский

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Enhancing electromagnetic absorption performance of Molybdate@Carbon by metal ion substitution

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 163, P. 92 - 100

Published: May 25, 2023

Language: Английский

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Multi‐Scale Design of Metal–Organic Framework Metamaterials for Broad‐Band Microwave Absorption

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

Published: March 12, 2024

Abstract The development of nanocomposite microwave absorbers is a critical strategy for tackling electromagnetic pollution. However, challenges persist regarding material stability and achieving broadband absorption. Herein, novel multi−scale design approach metamaterial proposed. First, series bimetallic (cobalt copper) semiconductive metal–organic framework (SC−MOF) crystals with atomically resolved structures are successfully prepared to serve as building blocks metamaterials. By simply adjusting the concentration ratio two ions, controllable preparation crystal morphology can be achieved. This enables precisely tune absorption peak bandwidth range SC−MOF, resulting in excellent EMW performance (effective bandwidth: 6.16 GHz, minimum reflection loss: −61 dB). Based on this, printable inks further constructed by encapsulating SC−MOF polydimethylsiloxane 3D‐printed multi−layered based woodpile porous architecture. absorber demonstrates near‐perfect spectrum (with 11.33 GHz), closely matching theoretical simulations. approach, combining precise MOF materials construction topological structure design, offers new insights absorbers.

Language: Английский

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Synthesis of polymer-derived N,O-doped bowl-like hollow carbon microspheres for improved electromagnetic wave absorption using controlled template pyrolysis

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 463, P. 142398 - 142398

Published: March 13, 2023

Language: Английский

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