Ultralight pyrolytic carbon foam reinforced with amorphous carbon nanotubes for broadband electromagnetic absorption

Kong, Luo; Luo, Sihan; Zhang, Shuyu; Zhang, Guiqin; Liang, Yi

doi:10.1007/s12613-022-2476-6

Cited by 29 publications

(4 citation statements)

References 60 publications

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“…Meanwhile, it is discovered that the lamellar structure of graphite is irregular, and the degree of graphitization of the sample is not high. 20 The detailed information is shown in the supplemental material. Figure 2 below shows the TEM microstructure image of the Ni sample.…”

Section: Resultsmentioning

confidence: 99%

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Bi,

Dai,

et al. 2024

ECS J. Solid State Sci. Technol.

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High-performance and cost-effective microwave absorbing materials are of vital importance in not only military but also civil fields. Here, an in-situ generation-carbonization one-step method is proposed to synthesize excellent absorbents based on a common solid waste, willow catkins. The results demonstrate that the microwave absorption performance has been successfully improved owing to the magnetic particles, the core-shell nanoparticles, and the hierarchical porous structure, which results in strong conductivity loss, dielectric loss, magnetic loss, interface polarization, and multiple scattering. The maximum reflection loss (RLmax) reaches up to -50.66 dB and -49.09 dB, respectively, at 16.6 and 17.1 GHz with the thickness of 1.65 mm, resulting in double-peak absorption. What’s more, the effective absorption bandwidth (EAB, RL<−10 dB) can get up to 5.7 GHz (from 12.4 to 18 GHz) with the thickness of 1.84 mm. Great absorption performance can be obtained simply through impregnation and carbonization, which constructs a fruitful and cost-effective paradigm for resource utilization of solid waste such as willow catkins.

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Section: Resultsmentioning

confidence: 99%

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Bi,

Dai,

et al. 2024

ECS J. Solid State Sci. Technol.

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show abstract

“…Similarly, the nanohybrid of aCNT-CdSe quantum dots shows great potential as an electromagnetic wave and microwave absorber and has good optical properties [9,86]. Combined with Fe 3 O 4 or a 3D porous pyrolytic carbon (PyC) foam, aCNTs also exhibit potential for use as absorbers of electromagnetic waves [125,126]. In addition to the wide interlamellar space, the coiled structure has the advantage of a high reflection frequency inside the material, which makes CaCNTs promising as microwave adsorption materials.…”

Section: Absorptionmentioning

confidence: 99%

State-of-the-Art Review on Amorphous Carbon Nanotubes: Synthesis, Structure, and Application

Ren,

Hussain,

Chang

et al. 2023

IJMS

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Carbon nanotubes (CNTs) have rapidly received increasing attention and great interest as potential materials for energy storage and catalyst fields, which is due to their unique physicochemical and electrical properties. With continuous improvements in fabrication routes, CNTs have been modified with various types of materials, opening up new perspectives for research and state-of-the-art technologies. Amorphous CNTs (aCNTs) are carbon nanostructures that are distinctively different from their well-ordered counterparts, such as single-walled and multi-walled carbon nanotubes (SWCNTs and MWCNTs, respectively), while the atoms in aCNTs are grouped in a disordered, crystalline/non-crystalline manner. Owing to their unique structure and properties, aCNTs are attractive for energy storage, catalysis, and aerospace applications. In this review, we provide an overview of the synthetic routes of aCNTs, which include chemical vapor deposition, catalytic pyrolysis, and arc discharge. Detailed morphologies of aCNTs and the systematic elucidation of tunable properties are also summarized. Finally, we discuss the future perspectives as well as associated challenges of aCNTs. With this review, we aim to encourage further research for the widespread use of aCNTs in industry.

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“…One-dimensional (1D) carbon materials have been considered one of the most promising EM wave absorbers, such as carbon nanofibers and carbon nanotubes (CNT), due to their tunable electrical conductivity and low density. − Benefiting from the high aspect ratio, the attenuation ability of 1D carbon structures can be improved by the formation of a carrier transport path under EM fields. − The electrical conductivity of 1D carbon structures can be enhanced by increasing their graphitization degree, which can further increase their attenuation ability . This makes them a promising option for efficient absorption in the lower-frequency region.…”

Section: Introductionmentioning

confidence: 99%

Construction of Hollow Carbon Nanofibers with Graphene Nanorods as Nano-Antennas for Lower-Frequency Microwave Absorption

Song

Xue

et al. 2023

ACS Appl. Mater. Interfaces

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Electromagnetic (EM) wave absorbers at a lower-frequency region (2−8 GHz) require higher attenuation ability to achieve efficient absorption. However, the impedance match condition and attenuation ability are usually inversely related. Herein, one-dimensional hollow carbon nanofibers with graphene nanorods are prepared based on coaxial electrospinning technology. The morphology of graphene nanorods can be controlled by the annealing process. As the annealing time increased from 2 to 8 h, graphene nanospheres grew into graphene nanorods, which were catalyzed by Co catalysts derived from ZIF-67 nanoparticles. These nanorods can play the role of nano-antennas, which can guide EM waves into materials to enhance impedance match conditions. As a result, the carbon nanofibers with graphene nanorods possess a larger impedance match area with higher attenuation ability. The minimum reflection loss reaches −57.1 dB at a thickness of 4.6 mm, and the effective absorption bandwidth can cover almost both the S and C bands (2.4−8 GHz). This work contributes a meaningful perspective into the modulation of microwave absorption performance in the lower-frequency range.

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Ultralight pyrolytic carbon foam reinforced with amorphous carbon nanotubes for broadband electromagnetic absorption

Cited by 29 publications

References 60 publications

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

Biomass-Derived Integrated Hierarchical Porous Carbon Embedded with Ni@C Nanoparticles for High-Performance and Cost-Effective Microwave Absorbent Design

State-of-the-Art Review on Amorphous Carbon Nanotubes: Synthesis, Structure, and Application

Construction of Hollow Carbon Nanofibers with Graphene Nanorods as Nano-Antennas for Lower-Frequency Microwave Absorption

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