Dual-pathway optimization on microwave absorption characteristics of core–shell Fe3O4@C microcapsules: Composition regulation on magnetic core and MoS2 nanosheets growth on carbon shell

Liu, Yonglei; Tian, Chunhua; Wang, Fengyuan; Hu, Bo; Xu, Ping; Han, Xijiang; Du, Yunchen

doi:10.1016/j.cej.2023.141867

Cited by 82 publications

(29 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Two prominent peaks at 161.1 and 162.5 eV are present, corresponding to S 2p 3/2 and S 2p 1/2 , respectively, further indicating the presence of MoS 2 . Additionally, two broad and weak peaks appear at 168.2 and 163.6 eV, which are attributed to the high oxide state sulfate and unsaturated sulfur elements, respectively . The C 1s spectra of Fe 3 O 4 @C@MoS 2 composites, as shown in Figure g, are consistent with those of Fe 3 O 4 @C nanoplates.…”

Section: Resultssupporting

confidence: 58%

“…Additionally, two broad and weak peaks appear at 168.2 and 163.6 eV, which are attributed to the high oxide state sulfate and unsaturated sulfur elements, respectively. 47 The C 1s spectra of Fe 3 O 4 @C@MoS 2 composites, as shown in Figure 1g, are consistent with those of Fe 3 O 4 @C nanoplates. The XRD and XPS results show that Fe 3 O 4 @C and Fe 3 O 4 @C@MoS 2 composites were successfully prepared, and the coexistence of 1T/2H mixed phases could be detected in the Fe 3 O 4 @C@MoS 2 composites.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe₃O₄@C@MoS₂ Composites with Shape Magnetic Anisotropy

Chen,

Xiao,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Ternary hierarchical Fe 3 O 4 @C@MoS 2 composites and binary hierarchical Fe 3 O 4 @C composites were successfully fabricated by a modified mixed solvothermal method, a self-oxidation polymerization method, and a hydrothermal process. Their magnetic properties and microwave absorption performance were investigated. Dual resonance behavior was observed in the Fe 3 O 4 @C@MoS 2 composites. One of the resonances was attributed to natural resonance with a resonance frequency of 2.58 GHz, which was much higher than that for Fe 3 O 4 bulk (1.5 GHz). The other originated from the superparamagnetic/ferromagnetic relaxation with a resonance frequency of 12.45 GHz. The minimum reflection loss (RL min ) reached −64.30 dB with a matched thickness of 2.24 mm at 11.64 GHz, and the maximum effective absorption bandwidth (EAB max ) covered 6.39 GHz with a matched thickness of 1.89 mm. In addition, the maximum Radar cross section (RCS) reduction value reached 31.90 dB m 2 at a scattering angle of 0°. Electron holography analysis confirmed a dense magnetic absorption network in the Fe 3 O 4 @C@MoS 2 composites. The boost in microwave absorption performance was caused by the synergistic effects of magnetic and dielectric properties owing to the ternary hierarchical structure, shape magnetic anisotropy, and incorporation of 1T/2H MoS 2 . Besides, the binary hierarchical Fe 3 O 4 @C composites also exhibited good absorbing performance caused by natural resonance, with an RL min of −52.90 dB at 5.80 mm, an EAB max of 5.98 GHz at 3.38 mm, and a relatively high RCS reduction value of 13.04 dB m 2 at θ = 20°. This work paves the way for designing multicomponent hierarchical absorbers with broadband and intensive microwave absorption.

show abstract

Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe₃O₄@C@MoS₂ Composites with Shape Magnetic Anisotropy

Chen,

Xiao,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…4j, comparing the absorption performance of MPC-S3 with that of previously reported molybdenum-based and carbon-based absorbers, the honeycomb-like porous material rich in heterointerfaces prepared in this work has excellent absorption performance, regardless of the RL min value or EAB value. 20,[40][41][42][43][44][45][46][47][48] In addition, the inuence of the degree of graphitization on EMW absorption performance was studied. The temperature determines the degree of graphitization, and the MPC-S3 precursor sample was carbonized at 700 °C, 800 °C, and 900 °C, respectively.…”

Section: Resultsmentioning

confidence: 99%

Constructing interfacial polarization sites within a honeycomb-like porous structureviaa spatially confined-etching strategy for boosting electromagnetic wave absorption

Hou,

Wang,

et al. 2023

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…Figure 4f and Table S1 (Supporting Information) were EMA properties comparison with other literature absorbents. Comparison with Mn-base composites and other metal composites, [36][37][38][39][40] the peanut-like MnO@C composite in this work exhibited great EMA performance, a wide EAB (reached 6.6 GHz), and a low thickness. [41][42][43] Figure 5 shows the dielectric parameters for MnO@C. Figure 5a,b records the real and imaginary parts of the dielectric parameters (𝜖', 𝜖") of four different curvatures MnO@C composites at 2-18 GHz, respectively.…”

Section: Electromagnetic Wave-adsorption Performance Of Mno@cmentioning

confidence: 89%

Controllable Synthesis of Highly Symmetrical Streamlined Structure for Wideband Microwave Absorption

Qian,

Lv,

et al. 2023

Small

View full text Add to dashboard Cite

Highly symmetrical and streamlined nanostructures possessing unique electron scattering, electron‐phonon coupling, and electron confinement characteristics have attracted a lot of attention. However, the controllable synthesis of such a nanostructure with regulated shapes and sizes remains a huge challenge. In this work, a peanut‐like MnO@C structure, assembled by two core–shell nanosphere is developed via a facile hydrogen ion concentration regulation strategy. Off‐axis electron holography technique, charge reconstruction, and COMSOL Multiphysics simulation jointly reveal the unique electronic distribution and confirm its higher dielectric sensitive ability, which can be used as microwave absorption to deal with currently electromagnetic pollution. The results reveal that the peanut‐like core–shell MnO@C exhibits great wideband properties with effective absorption bandwidth of 6.6 GHz, covering 10.8–17.2 GHz band. Inspired by this structure‐induced sensitively dielectric behavior, promoting the development of symmetrical and streamlined nanostructure would be attractive for many other promising applications in the future, such as piezoelectric material and supercapacitor and electromagnetic shielding.

show abstract

Dual-pathway optimization on microwave absorption characteristics of core–shell Fe3O4@C microcapsules: Composition regulation on magnetic core and MoS2 nanosheets growth on carbon shell

Cited by 82 publications

References 59 publications

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe₃O₄@C@MoS₂ Composites with Shape Magnetic Anisotropy

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe₃O₄@C@MoS₂ Composites with Shape Magnetic Anisotropy

Constructing interfacial polarization sites within a honeycomb-like porous structureviaa spatially confined-etching strategy for boosting electromagnetic wave absorption

Controllable Synthesis of Highly Symmetrical Streamlined Structure for Wideband Microwave Absorption

Contact Info

Product

Resources

About

Dual-pathway optimization on microwave absorption characteristics of core–shell Fe3O4@C microcapsules: Composition regulation on magnetic core and MoS2 nanosheets growth on carbon shell

Cited by 82 publications

References 59 publications

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe3O4@C@MoS2 Composites with Shape Magnetic Anisotropy

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe3O4@C@MoS2 Composites with Shape Magnetic Anisotropy

Constructing interfacial polarization sites within a honeycomb-like porous structureviaa spatially confined-etching strategy for boosting electromagnetic wave absorption

Controllable Synthesis of Highly Symmetrical Streamlined Structure for Wideband Microwave Absorption

Contact Info

Product

Resources

About

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe₃O₄@C@MoS₂ Composites with Shape Magnetic Anisotropy

Dual Resonance Behavior and Enhanced Microwave Absorption Performance of Fe₃O₄@C@MoS₂ Composites with Shape Magnetic Anisotropy