Construction of the SiC nanowires network structure decorated by MoS2 nanoflowers in porous Si3N4 ceramics for electromagnetic wave absorption

Bai, Jialin; Huang, Zhenhua; Yao, Xiumin; Liu, Xuejian; Huang, Zhengren

doi:10.1016/j.cej.2023.143809

Cited by 15 publications

(7 citation statements)

References 73 publications

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“…Furthermore, the normalized impedance matching jZ r j (jZ r j = Z in /Z 0 ) and α can be calculated as follows 47 : Normally, the higher attenuation constant is caused by the unique microstructure and surface morphology of the absorbers 51,52 The high α is in connection with the strong polarization loss from the heterogeneous interface and the extremely strong dielectric loss of PANI. 46,53 However, it is found that the CMP-3 has the largest α value, representing attenuation capacity, while it still fails to produce the best MA performance among CMPs. It is because the MA performance is highly related to another important parameter, impedance matching (Figure 9B).…”

Section: Resultsmentioning

confidence: 97%

“…The result shows that CMP‐3 displays the largest α values, indicating the ideal attenuation effect for the incident microwave. Normally, the higher attenuation constant is caused by the unique microstructure and surface morphology of the absorbers 51,52 The high α is in connection with the strong polarization loss from the heterogeneous interface and the extremely strong dielectric loss of PANI 46,53 . However, it is found that the CMP‐3 has the largest α value, representing attenuation capacity, while it still fails to produce the best MA performance among CMPs.…”

Section: Resultsmentioning

confidence: 99%

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Impedance matching optimization of hierarchical carbon fiber@MoS₂@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

Hu,

Zhou,

2023

Polymers for Advanced Techs

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Carbon fiber (CF) has been extensively used in the research of microwave absorption owning to its excellent performance, but it also faces a series of problems such as impedance mismatch and low absorption intensity. The core‐sheath microstructure with CF as the inner core is constructed to solve the above issues by the introduction of other sheath layers. In this work, the MoS2 sheath and polyaniline (PANI) sheath are successively introduced into the CF matrix to obtain a hierarchical CF@MoS2@PANI nanocomposite with core‐sheath structure through a straightforward hydrothermal method and in‐situ polymerization. The obtained CF@MoS2@PANI nanocomposite exhibit the minimum reflection loss value of −42.23 dB at 10.11 GHz while the thickness is 2.5 mm, much higher than those of pure CF (below −10 dB) and CF@MoS2 nanocomposite (−25.60 dB). Moreover, the distinctive hierarchical core‐sheath structure contributes to providing more active sites, prolonging the transmission path of electromagnetic waves, and forming heterogeneous interfaces. Consequently, the electromagnetic wave attenuation mechanism of CF@MoS2@PANI nanocomposite is attributed to a synergistic effect of conductive loss, multiple reflection/scattering, dipole polarization, and interface polarization. This work offers an effective and promising strategy to design a three‐dimensional hierarchical core‐sheath microstructure for the development of composite absorbers.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Impedance matching optimization of hierarchical carbon fiber@MoS₂@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

Hu,

Zhou,

2023

Polymers for Advanced Techs

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Section: Introductionmentioning

confidence: 99%

“…If the microstructure of MoS 2 could be modified or constructed in the actual application environment of two-dimensional materials, and the structure–activity relationship of defects or interfaces could be introduced through qualitative characterization and analysis, the dielectric microwave absorption mechanism of MoS 2 could be effectively explored, and the application prospect of low-dimensional transition metal sulfides in the field of microwave absorption could finally be expanded. In addition, the microwave absorption of single MoS 2 is poor, so researchers are devoted to studying composite materials of MoS 2 . − Whether it is composited with dielectric materials or magnetic materials, the microwave absorption performance could be improved. − The schematic illustrations of some representative MoS 2 -based microwave absorption composites are shown in Figures b and c.…”

Section: Introductionmentioning

confidence: 99%

MoS₂-Based Nanocomposites for Microwave Absorption: A Review

Li,

et al. 2024

ACS Appl. Nano Mater.

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Molybdenum disulfide (MoS2), as a two-dimensional material, has a potential application prospect in microwave absorption, electromagnetic shielding, energy storage, electrochemistry, and other fields due to its unique structure, excellent electrical conductivity, abundant surface area, and good mechanical strength. In this paper, the microwave absorbing properties of MoS2-based composites are reviewed objectively, and the recent research achievements and progress in dielectric loss type and magnetic loss type composites are summarized. Then, the microwave absorption mechanism of MoS2-based composites is systematically analyzed in terms of dielectric loss and magnetic loss. At the same time, the application of MoS2-based microwave absorbing materials in current social needs is summarized including military radar stealth and civil electronic communication. In addition, the challenges and bottlenecks in the future development of microwave absorber materials are also presented.

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“…SiC nanowires decorated by MoS 2 nanoflowers were synthesized in porous Si 3 N 4 ceramics to create flower-branched MoS 2 /SiC/ Si 3 N 4 microarchitecture. The porous MoS 2 /SiC/Si 3 N 4 nanocomposites achieved an EAB of 3.5 GHz and a maximum RL of −70.4 dB at 2.1 mm 137. SiO 2 @MoS 2 core−shell architecture nanospheres were constructed, in which MoS 2 nanosheets were irregularly growing on SiO 2 .…”

mentioning

confidence: 99%

Recent Progress and Outlook on the Emerging Low-Dimensional MoS₂ Nanostructures for Microwave Absorption

Li,

Liang,

Wang

et al. 2023

ACS Appl. Electron. Mater.

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To tackle the deteriorating electromagnetic interference and pollution problems, enhanced microwave absorption materials are urgently being developed. Lowdimensional molybdenum disulfide (MoS 2 ) nanostructures have been comprehensively researched and employed as microwave absorption materials in virtue of their tailorable valence bands, ample active polarization sites, appropriate electronic band configuration, ample morphologies, distinctive dielectric, and electric behaviors. The excellent merits are expected to satisfy the extensive and unique application requirements. Low-dimensional MoS 2 nanostructure microwave absorption materials excel in ultrathin thickness, lightweight, broad effective absorption bandwidth, and strong attenuation capability. The advantages are due to well-matched impedance matching, multiple polarization relaxations, and multiple reflections and scatterings effect. This review sketches up the theories on microwave propagation, attenuation, and performance evaluation. Simultaneously, the preparation methods of lowdimensional MoS 2 nanostructures are elaborately categorized. More importantly, the cuttingedge research progresses on low-dimensional MoS 2 nanostructures for microwave absorption are thoroughly combed. Finally, some perspectives and challenges for the future orientation of low-dimensional MoS 2 nanostructures are highlighted. Without doubt, lowdimensional MoS 2 nanostructures have illuminated boundless roadmaps for further advancement as high-performance microwave absorption materials.

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Construction of the SiC nanowires network structure decorated by MoS2 nanoflowers in porous Si3N4 ceramics for electromagnetic wave absorption

Cited by 15 publications

References 73 publications

Impedance matching optimization of hierarchical carbon fiber@MoS₂@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

Impedance matching optimization of hierarchical carbon fiber@MoS₂@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

MoS₂-Based Nanocomposites for Microwave Absorption: A Review

Recent Progress and Outlook on the Emerging Low-Dimensional MoS₂ Nanostructures for Microwave Absorption

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Construction of the SiC nanowires network structure decorated by MoS2 nanoflowers in porous Si3N4 ceramics for electromagnetic wave absorption

Cited by 15 publications

References 73 publications

Impedance matching optimization of hierarchical carbon fiber@MoS2@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

Impedance matching optimization of hierarchical carbon fiber@MoS2@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

MoS2-Based Nanocomposites for Microwave Absorption: A Review

Recent Progress and Outlook on the Emerging Low-Dimensional MoS2 Nanostructures for Microwave Absorption

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Impedance matching optimization of hierarchical carbon fiber@MoS₂@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

Impedance matching optimization of hierarchical carbon fiber@MoS₂@PANI nanocomposite with core‐sheath structure for achieving excellent microwave absorption

MoS₂-Based Nanocomposites for Microwave Absorption: A Review

Recent Progress and Outlook on the Emerging Low-Dimensional MoS₂ Nanostructures for Microwave Absorption