Ultra-small Co/CNTs nanohybrid from metal organic framework with highly efficient microwave absorption

Xiao, Xiangyun; Zhu, Wenjun; Tan, Zhen; Tian, Wei; Guo, Yang; Wang, Hong; Fu, Jianan; Jian, Xian

doi:10.1016/j.compositesb.2018.08.109

Cited by 141 publications

(24 citation statements)

References 41 publications

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“…The nanocomposite pyrolyzed at 650 °C displayed a minimum RL value of − 47.6 dB and an EAB of 5.11 GHz at the thickness of 2.0 mm [ 114 ]. Ulteriorly, Xiao et al prepared the Co/CNTs nanohybrid by carbonizing ZIF-67 at the gas flow of C 2 H 2 and Ar [ 115 ]. The RL value of nanocomposites could achieve − 49.16 dB at a thickness of 2.5 mm, corresponding to an EAB of 4.2 GHz.…”

Section: Carbon-based Mof Derivatives For Emw Absorption Applicationsmentioning

confidence: 99%

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

et al. 2021

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To tackle the aggravating electromagnetic wave (EMW) pollution issues, high-efficiency EMW absorption materials are urgently explored. Metal–organic framework (MOF) derivatives have been intensively investigated for EMW absorption due to the distinctive components and structures, which is expected to satisfy diverse application requirements. The extensive developments on MOF derivatives demonstrate its significantly important role in this research area. Particularly, MOF derivatives deliver huge performance superiorities in light weight, broad bandwidth, and robust loss capacity, which are attributed to the outstanding impedance matching, multiple attenuation mechanisms, and destructive interference effect. Herein, we summarized the relevant theories and evaluation methods, and categorized the state-of-the-art research progresses on MOF derivatives in EMW absorption field. In spite of lots of challenges to face, MOF derivatives have illuminated infinite potentials for further development as EMW absorption materials.

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Section: Carbon-based Mof Derivatives For Emw Absorption Applicationsmentioning

confidence: 99%

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

et al. 2021

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“…Very recently, metal–organic frameworks (MOFs) containing magnetic elements derived from hierarchical magnetic metal nanoparticles/carbon@CNT structures − have drawn more attention as microwave absorbers because of their simple synthesis process and easy microstructure control. Jiang et al .…”

Section: Introductionmentioning

confidence: 99%

NiCo Alloy/Carbon Nanorods Decorated with Carbon Nanotubes for Microwave Absorption

Wang

Wen

Bai

et al. 2019

ACS Appl. Nano Mater.

164

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Fabricating high-performance electromagnetic absorbents with strong absorbing intensity and wide effective absorbing bandwidth at low filler loading is still a challenge. Herein, hierarchical NiCo alloy/carbon nanorod@carbon nanotube (NiCo alloy/carbon nanorod@CNT) structures were prepared by a carbonization process using NiCo-MOF-74 nanorods as precursors in Ar flow, in which the aspect ratio of the NiCo alloy/carbon nanorod and the coating density of the CNTs could be easily controlled by the ratio of Ni/Co in the precursor. When the Ni/Co molar ratio was 1:1, a dual electric network was easily formed among the NiCo alloy/carbon nanorods as well as between the intertwined coating CNTs due to the higher aspect ratio and larger coating density, which induced significant enhancement of the comprehensive microwave absorbing properties of the NiCo alloy/carbon nanorod@CNT composites. By adding only 5 wt % to paraffin, the resulting composite displayed a maximum reflection loss of −58.8 dB and a covered an effective bandwidth as wide as 6.5 GHz (11.5–18 GHz) with a matching thickness of 2.6 mm. These outstanding microwave absorption properties can be ascribed to the stronger microwave attenuation capacity caused by the dual electric network for extra conduction loss and better impedance matching. This work provides a new direction for the design of carbon-based absorber with high performance at low filler loading.

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“…There is a mainstream trend in constructing two or multiple components with synergistic effects of dielectric loss and magnetic loss to effectively regulate EM parameters. , The heterogeneous structure introduces abundant junction interfaces and defects, which can act as the interfacial polarization and scattering centers . Various composites composed of double dielectric loss materials or dielectric/magnetic loss composite materials as MAMs have been designed in recent works, such as Co/CNTs, RGO/ZnO, Co/CNTs, etc., which exhibited good microwave absorption properties, indicating that the multiple component absorbers are favorable to enhance the microwave absorption.…”

Section: Introductionmentioning

confidence: 99%

Fe/Fe₃O₄@N-Doped Carbon Hexagonal Plates Decorated with Ag Nanoparticles for Microwave Absorption

Luo

Cheng

et al. 2019

ACS Appl. Nano Mater.

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Electromagnetic (EM) interference and radiation affecting human health and the operation of precision electronic devices have drawn considerable attention in recent years. Herein, a promising microwave-absorbing material, Ag nanoparticles (AgNPs)-decorated Fe/Fe 3 O 4 @N-doped carbon (NC) composite, was designed and fabricated with the Fe 2 O 3 @polydopamine@Ag hexagonal plates as the precursor. Crystalline structure, phase conversion, micromorphology, static magnetic properties, and EM characteristics of the samples were studied by various analytical techniques. The EM parameters of the obtained samples could be manipulated by increasing the pyrolysis temperature, exhibiting gradually enhanced dielectric and magnetic loss. Optimizing the coating thickness turns out to be a critical factor for regulating microwave absorption. The product obtained at 600 °C performs a maximum reflection loss (RL) value of −37.5 dB (10.64 GHz, 1.6 mm) and an effective absorption bandwidth (RL < −10 dB) up to 7.36 GHz (10.64−18 GHz) with a thickness of only 1.4 mm. In addition, the possible EM wave absorption mechanisms were further investigated in detail. In sum, it has been confirmed that the as-obtained AgNPs-decorated Fe/Fe 3 O 4 @NC composite with ultrabroad absorption bandwidths and strong absorption capacity would be an attractive candidate material for effective EM absorption materials in the future.

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Ultra-small Co/CNTs nanohybrid from metal organic framework with highly efficient microwave absorption

Cited by 141 publications

References 41 publications

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

NiCo Alloy/Carbon Nanorods Decorated with Carbon Nanotubes for Microwave Absorption

Fe/Fe₃O₄@N-Doped Carbon Hexagonal Plates Decorated with Ag Nanoparticles for Microwave Absorption

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Ultra-small Co/CNTs nanohybrid from metal organic framework with highly efficient microwave absorption

Cited by 141 publications

References 41 publications

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

Carbon-Based MOF Derivatives: Emerging Efficient Electromagnetic Wave Absorption Agents

NiCo Alloy/Carbon Nanorods Decorated with Carbon Nanotubes for Microwave Absorption

Fe/Fe3O4@N-Doped Carbon Hexagonal Plates Decorated with Ag Nanoparticles for Microwave Absorption

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Product

Resources

About

Fe/Fe₃O₄@N-Doped Carbon Hexagonal Plates Decorated with Ag Nanoparticles for Microwave Absorption