Texture Regulation of Metal–Organic Frameworks, Microwave Absorption Mechanism‐Oriented Structural Optimization and Design Perspectives

Gao, Zhenguo; Iqbal, Aamir; Hassan, Tufail; Zhang, Limin; Wu, Hongjing; Koo, Chong Min

doi:10.1002/advs.202204151

Cited by 99 publications

(25 citation statements)

References 163 publications

(230 reference statements)

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“…To improve the effective complex permittivity and enhance dielectric loss and magnetic loss abilities, the MOF precursors are often converted into metal-carbon composite by the pyrolysis process. Based-on previous reports, [47,[51][52] the pyrolysis of MOFs gives abundant disorder/graphite carbon and metal oxides/metal alloys from organic ligands and metal centres, respectively. The obtained carbon component can supply rich defects and free electrons, which lead to interfacial polarization loss and resistance loss.…”

Section: Microwave Absorption Theoretical Calculationsmentioning

confidence: 93%

Review and Perspective of Tailorable Metal‐Organic Framework for Enhancing Microwave Absorption

Miao

Chen

et al. 2023

Chin. J. Chem.

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Comprehensive Summary Metal‐organic frameworks (MOFs) and their pyrolytic derivates, displaying diverse chemical compositions and microstructures, provide the infinite potential for preparing high‐performance microwave absorption materials (MAMs) and have attracted extensive attention. In this review, we systematically reviewed the recent progress of MOF‐based MAMs, including three types of MOF‐based MAMs (MOF‐derived metal/carbon nanocomposites, MOF‐based hybridization materials and conductive MOF). Besides that, the microwave absorption properties and their related physical and chemical appearance were also analyzed. On behalf of synergistic effects between microstructures, dielectric components and magnetic response, the MOF‐based MAMs show excellent microwave absorption performance, which is superior to that of traditional single metal, metal alloy and pure carbon‐based MAMs. Furthermore, the novel conductive MOF with tunable electrical conductivity shows great potential in MAMs due to the fact that it can dramatically simplify the synthesis process.

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Section: Microwave Absorption Theoretical Calculationsmentioning

confidence: 93%

Review and Perspective of Tailorable Metal‐Organic Framework for Enhancing Microwave Absorption

Miao

Chen

et al. 2023

Chin. J. Chem.

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“…Cui et al designed a composite made of rGO, Nb 2 CT x , and Fe 3 O 4 that exhibited excellent electromagnetic wave absorption with an RL min of −59.17 dB at a thickness of 2.5 mm and simultaneously attained a wide EAB of 6.8 GHz . Notably, the flexible crystal pore size, changeable element types, and regular morphology of metal–organic frameworks (MOFs) provide inherent advantages that make them a viable option as precursors for the production of magnetic metals. − The MOFs containing magnetic metal ion-derived metal/carbon nanocomposites show both magnetic loss and electric dielectric loss, which provide multiple ways for the dissipation of electromagnetic waves. − However, there are few works on the fabrication of EMA materials using MXene, rGO, and MOF-derived materials.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide/MXene/FeCoC Nanocomposite Aerogels Derived from Metal–Organic Frameworks toward Efficient Microwave Absorption

Lei,

Liu,

Dong

et al. 2024

ACS Appl. Nano Mater.

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Efficient electromagnetic wave absorption (EMA) materials are urgently needed to solve the increasingly serious electromagnetic pollution problems in both the modern military and civil fields. Multidimensional and multielement electromagnetic absorbing materials exhibit enormous potential in EMA applications owing to the combination of material and structure advantages. Herein, a three-dimensional (3D) reduced graphene oxide/Ti 3 C 2 T x MXene/iron−cobalt alloy carbon (rGO/MXene/FeCoC) nanocomposite aerogel derived from FeCo-ZIF metal−organic frameworks (MOFs) was successfully fabricated by combining freezedrying and pyrolysis methods. The minimum reflection loss (RL min ) of the optimized rGO/MXene/FeCoC-30% is −61.4 dB and the effective absorption band (EAB, <−10 dB) reaches up to 4.95 GHz with a matching thickness of 1.55 mm. The outstanding EMA performance benefits the excellent impedance matching, the rich multiple reflections and scattering in three-dimensional porous structures, and the favorable dielectric-magnetic synergistic losses endowed by graphene, MXene, and FeCoC nanoparticles. The successful construction of the multicomponent rGO/MXene/FeCoC nanocomposite aerogel provides a prospective direction for the development of high-efficient electromagnetic absorbing materials.

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“…Moreover, the single homogeneity material can not cause polarization loss, and the lack of a magnetic component results in no magnetic loss. As for magnetic loss materials, such as metal–organic frameworks (MOFs), − they have captured vast attention of researchers in recent years because of their merits like large specific surface area and porous microstructure. Nevertheless, they have some disadvantages like narrow absorption bandwidth and high density, which greatly limit their application in microwave absorption.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

Cao

Yang

Zhao

et al. 2023

ACS Appl. Mater. Interfaces

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An ultralight Ni-MOF-rGO aerogel which possess the merits of not only broad bandwidth and strong absorption but also lightweight and thin matching thickness is fabricated through a hydrothermal treatment, freeze-drying, and annealing procedure. The Ni@C microspheres are dispersed randomly and evenly on the graphene oxide (GO) nanosheets, which can be proved through SEM and TEM results. The electromagnetic parameters of the composite can be adjusted by changing the mass ratio of the MOF and GO to endow the material with both good impedance matching and superior electromagnetic wave absorption performances. Consequently, the resulting composite shows outstanding microwave absorption performance, which achieves strong absorption (−51.19 dB) and broad effective absorption bandwidth (6.32 GHz) with a thickness of 1.9 mm while the filling content is only 2 wt %. In addition, the multiple loss mechanisms of the Ni-MOF-rGO aerogel are illustrated, including conduction loss, dipolar polarization, interfacial polarization, magnetic resonance, and eddy current loss. In a word, the extraordinary microwave absorption performance is ascribed to the synergistic effects of the unique multiple layered structure of GO and the hollow core−shell structure of the Ni@C microsphere. This work demonstrates that the ultralight aerogel with excellent electromagnetic wave absorption performance is a promising strategy for microwave absorption application.

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Texture Regulation of Metal–Organic Frameworks, Microwave Absorption Mechanism‐Oriented Structural Optimization and Design Perspectives

Cited by 99 publications

References 163 publications

Review and Perspective of Tailorable Metal‐Organic Framework for Enhancing Microwave Absorption

Review and Perspective of Tailorable Metal‐Organic Framework for Enhancing Microwave Absorption

Reduced Graphene Oxide/MXene/FeCoC Nanocomposite Aerogels Derived from Metal–Organic Frameworks toward Efficient Microwave Absorption

Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

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