Construction of shell-like carbon superstructures through anisotropically oriented self-assembly for distinct electromagnetic wave absorption

Li, Xiao; Zhou, Haowei; Zhang, Jinlin; Zhang, Xinyue; Li, Man; Zhang, Jieyan; Darwish, Moustafa Adel; Zhou, Tao; Sun, Shi-Kuan; Xie, Lei; Zhou, Di

doi:10.1039/d3ta06822f

Cited by 12 publications

(1 citation statement)

References 45 publications

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“…Electromagnetic wave (EMW) absorbing materials have been highly expected to resolve these problems, 1–3 since these kinds of materials could effectively absorb EMW and convert theme into heat energy and/or other forms of energy. 4–6 Based on the loss mechanism, the EMW absorbing materials can be classified as magnetic materials and dielectric materials, in which the absorption capability of magnetic materials (Fe, Co, Ni, their alloys, etc. ) will decrease and even disappear at a temperature higher than the Curie temperature.…”

Section: Introductionmentioning

confidence: 99%

A competitive reaction strategy toward dielectric phases for enhancing electromagnetic wave absorption of polymer-derived ceramics

Hu,

Chen,

et al. 2024

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

A competitive reaction strategy toward dielectric phases for enhancing electromagnetic wave absorption of polymer-derived ceramics

Hu,

Chen,

et al. 2024

J. Mater. Chem. A

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Enhancing Defect-Induced Dipole Polarization Strategy of SiC@MoO3 Nanocomposite Towards Electromagnetic Wave Absorption

Wang,

Zhao,

Miao

et al. 2024

Nano-Micro Lett.

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Defect engineering in transition metal oxides semiconductors (TMOs) is attracting considerable interest due to its potential to enhance conductivity by intentionally introducing defects that modulate the electronic structures of the materials. However, achieving a comprehensive understanding of the relationship between micro-structures and electromagnetic wave absorption capabilities remains elusive, posing a substantial challenge to the advancement of TMOs absorbers. The current research describes a process for the deposition of a MoO3 layer onto SiC nanowires, achieved via electro-deposition followed by high-temperature calcination. Subsequently, intentional creation of oxygen vacancies within the MoO3 layer was carried out, facilitating the precise adjustment of electromagnetic properties to enhance the microwave absorption performance of the material. Remarkably, the SiC@MO-t4 sample exhibited an excellent minimum reflection loss of − 50.49 dB at a matching thickness of 1.27 mm. Furthermore, the SiC@MO-t6 sample exhibited an effective absorption bandwidth of 8.72 GHz with a thickness of 2.81 mm, comprehensively covering the entire Ku band. These results not only highlight the pivotal role of defect engineering in the nuanced adjustment of electromagnetic properties but also provide valuable insight for the application of defect engineering methods in broadening the spectrum of electromagnetic wave absor ption effectiveness. SiC@MO-t samples with varying concentrations of oxygen vacancies were prepared through in-situ etching of the SiC@MoO3 nanocomposite. The presence of oxygen vacancies plays a crucial role in adjusting the band gap and local electron distribution, which in turn enhances conductivity loss and induced polarization loss capacity. This finding reveals a novel strategy for improving the absorption properties of electromagnetic waves through defect engineering.

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The tune of shell numbers of multi-shell hollow mesoporous carbon microspheres for enhanced microwave absorption

Ma,

Cheng,

Dang

et al. 2024

Carbon

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Construction of shell-like carbon superstructures through anisotropically oriented self-assembly for distinct electromagnetic wave absorption

Abstract: Owing to their unique semi-hollow cavity structure, shell-like carbon superstructures hold excellent microwave absorption capability, in which the reflection loss can reach −49.14 dB and the effective absorption bandwidth can reach 8.24 GHz.

Cited by 12 publications

References 45 publications

A competitive reaction strategy toward dielectric phases for enhancing electromagnetic wave absorption of polymer-derived ceramics

A competitive reaction strategy toward dielectric phases for enhancing electromagnetic wave absorption of polymer-derived ceramics

Enhancing Defect-Induced Dipole Polarization Strategy of SiC@MoO3 Nanocomposite Towards Electromagnetic Wave Absorption

The tune of shell numbers of multi-shell hollow mesoporous carbon microspheres for enhanced microwave absorption

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