Hierarchical magnetic-dielectric synergistic Co/CoO/RGO microspheres with excellent microwave absorption performance covering the whole X band

Li, Qingqing; Tan, Jun; Wu, Zhihua; Wang, Lei; You, Wenbin; Wu, Limin; Che, Renchao

doi:10.1016/j.carbon.2022.08.090

Cited by 50 publications

(13 citation statements)

References 54 publications

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“…Figure c,d shows the comparison of the fabricated CFCNT0.35 nanocomposite with filler wt %, R L , and EAB for other available investigations. − Further, the comparison of CFCNT0.35 is made with the recently available nanocomposite in Supporting Information Table S3. The CFCNT0.35 nanocomposite structure has the ability to function in the presence of outside pressures in extreme environmental conditions despite degrading R L performance.…”

Section: Results and Discussionmentioning

confidence: 99%

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Tahalyani

Akhtar

Kar

2023

ACS Appl. Nano Mater.

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Highly flexible, bendable, stretchable, and ultralightweight microwave absorbers (MA) that can handle harsh environments are essential for conformal surface coating in aerospace and defence industries. Hence, crystalline carbon nanotubes (CNTs) are grown on carbon fibers (CFs) using the chemical vapour deposition technique (CVD) and embedded in polyurethane (PU) to obtain MA. The fabricated MA is flexible, highly stretchable (>400%), has a low percolation threshold (0.1 wt %), ultralightweight (0.35 wt %), and thin nanocomposite for enhanced microwave absorber performance. The thickness of MA is optimized to achieve the impedance matching condition by utilizing the CST microwave studio simulation and verified experimentally. The minimum reflection loss (R L) of −52.53 dB with effective absorber bandwidth (EAB) covering the complete X band at a 2.4 mm thickness is obtained for just 0.35 wt % CFCNT. The negligible change in R L and EAB after 1000 bending cycles and 2 h of water-bath sonication confirms the operating efficiency of MA in harsh environmental conditions. The mechanism of microwave absorption in the case of CF and CFCNT-based MA is elucidated concerning microwave properties, electrical conductivity, and morphology. The CST microwave studio simulation is also extended from the X band to the Ku band (12.4–18 GHz) for broadband microwave absorber application.

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Section: Results and Discussionmentioning

confidence: 99%

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Tahalyani

Akhtar

Kar

2023

ACS Appl. Nano Mater.

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“…Generally, EMW absorption materials include dielectric loss materials and magnetic loss materials. − Dielectric loss materials have been of widespread concern in the past decades, − such as graphene and its derivatives and MXenes. − These kinds of materials have the merits of superior conduction property, high specific surface area, and multilayered structure. However, they have some shortages too.…”

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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“…1–12 A large number of theoretical and experimental research has focused on the architecture of novel and promising microwave absorbing materials with strong absorption, broad EB, low density, and proper physicochemical stability toward developing the state-of-the-art in this fabulous field. 13–25…”

Section: Introductionmentioning

confidence: 99%

Microwave absorbing characteristics of porphyrin derivates: a loop of conjugated structure

Dogari

Peymanfar²,

Ghafuri

2023

RSC Adv.

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Hierarchical magnetic-dielectric synergistic Co/CoO/RGO microspheres with excellent microwave absorption performance covering the whole X band

Cited by 50 publications

References 54 publications

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for 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

Microwave absorbing characteristics of porphyrin derivates: a loop of conjugated structure

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