Sintering-regulated two-dimensional plate@shell basalt@NiO heterostructure for enhanced microwave absorption

Di, Jingru; Duan, Yuping; Pang, Huifang; Ma, Xin; Liu, Jia

doi:10.1016/j.apsusc.2021.151590

Cited by 23 publications

(7 citation statements)

References 42 publications

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“…The above analysis shows that MoS 2 /CoS 2 /VN hybrids have excellent dielectric properties, which contribute to EMW attenuation. In order to verify the relaxation behavior of polarization, on the basis of Debye's theory, the following relationship is drawn with the Cole-Cole curve: [68,69] 𝜀…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Zhou,

Lan,

Zhang

et al. 2023

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Reasonable composition design and controllable structure are effective strategies for harmonic electromagnetic wave (EMW) adsorption of multi‐component composites. On this basis, the hybrid MoS2/CoS2/VN multilayer structure with the triple heterogeneous interface is prepared by simple stirring hydrothermal, which can satisfy the synergistic interaction between different components and obtain excellent EMW absorption performance. Due to the presence of multiple heterogeneous interfaces, MoS2/CoS2/VN composites will produce strong interfacial polarization, while the defects in the sample will become the center of polarization, resulting in dipole polarization. Due to the excellent structural design of MoS2/CoS2/VN composite material, MoS2/CoS2/VN composite material not only has good conductive loss and polarization loss, but also can maintain excellent stability in simulated seawater, and enhance corrosion resistance. The MoS2/CoS2/VN composite with dual functions of corrosion resistant and microwave absorption achieves a minimum reflection loss (RL) of −50.48 dB and an effective absorption bandwidth of up to 5.76 GHz, covering both the X‐band and Ku‐band. Finally, this study provides a strong reference for the development of EMW absorption materials based on transition metal nitrides.

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Section: Resultsmentioning

confidence: 99%

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Zhou,

Lan,

Zhang

et al. 2023

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“…EMW absorbers can dissipate the EMWs incident on the surface by converting them into other forms of energy through mechanisms such as magnetic loss, dielectric loss, and resistance loss. , So far, carbon materials (such as carbon nanotubes, graphene, and porous carbon), magnetic metals (nickel, cobalt, and iron), transition metal oxides (NiO, Co 3 O 4 , MnO 2 , ZnCo 2 O 4 , NiFe 2 O 4 , and NiCo 2 O 4 ), conducting polymers (including polyaniline, polypyrrole, and so on), and semiconductor materials (like SiC and ZnO) have been widely developed as candidate EMW absorbing materials. Obviously, compared with other similar materials, nickel–cobalt oxides (NiCo 2 O 4 ) have designable morphology, strong polarization ability, and conductivity due to the presence of two different metal cations in the bimetallic oxide that can provide more active sites, which is more in line with the actual needs of industry for EMW absorbers. − For example, NiCo 2 O 4 -based absorbents with nanorods, microspheres, and flower-like morphologies can be prepared by effectively adjusting the synthesis conditions.…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole-Coated Composites of Flower-Shaped NiCo₂O₄/Co₃O₄ Nanosheets for Microwave Absorption

Wang,

Zhu,

Ping

et al. 2023

ACS Appl. Nano Mater.

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A 3D flower-like nickel−cobalt oxide/cobalt oxide @ polypyrrole (NiCo 2 O 4 /Co 3 O 4 @PPy) nanocomposite with a core− shell heterostructure was successfully prepared based on the morphology optimization and multicomponent composite strategy. By changing the ratio of PPy, full absorption of multiple bands can be achieved at different thicknesses of the optimized ternary composite. The RL min of NCO/Co 3 O 4 @PPy-2 can achieve −60.27 d B at a thickness of 2.9 mm, which covers the entire X-band with a filler loading of 10%. The maximum effective absorption bandwidth reached 5.25 GHz. The excellent absorption performance is attributed to the electromagnetic synergy effects and impedance matching between NiCo 2 O 4 /Co 3 O 4 and PPy. Therefore, the construction of a 3D core− shell flower heterostructure is an effective strategy for large-scale preparation of NiCo 2 O 4 -based high-performance absorbers, paving an inspirational route for the study of the electromagnetic wave absorption mechanism of hierarchical composite absorbers.

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“…and dielectric materials (BaTiO 3 , NiO, etc.) based on the absorption mechanisms. − However, these traditional materials have various drawbacks such as large density and narrow absorption bandwidth, which cannot meet the requirements of ideal MAMs. Recently, more suitable materials for MA such as transition-metal carbides/sulfides and carbon materials have been developed. − Among these novel candidates, molybdenum carbide (Mo 2 C) has attracted extensive attention owing to its excellent dielectric properties. − For example, Wang and co-authors reported the microwave absorption properties of pomegranate-like Mo 2 C@C nanospheres and investigated their attenuating mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Molybdenum Carbide/Cobalt Composite Nanorods via a “MOFs plus MOFs” Strategy for High-Efficiency Microwave Absorption

Zhao

Yao

et al. 2022

ACS Appl. Nano Mater.

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Herein, we report the synthesis of one-dimensional (1D) molybdenum carbide/cobalt nanorods that consist of multiple components including Mo 2 C, Co, and C (Mo 2 C/Co/C) based on a "MOFs plus MOFs" strategy. The 1D Mo-metal−organic frameworks (MOFs) were first prepared through reflux condensation. Then, a zeolitic-imidazolate framework (ZIF-67) was used as the Co source to decorate 1D Mo-MOFs to form the Mo-MOFs/ZIF-67 precursor. Finally, 1D Mo 2 C/Co/C ternary composite nanorods were obtained through pyrolysis of Mo-MOFs/ZIF-67 under an Ar atmosphere. The combination of multiple components including dielectric Mo 2 C, C, and magnetic Co could not only optimize the impedance matching but also provide multiple channels to attenuate the electromagnetic (EM) waves including conductive loss, dielectric polarization, and magnetic resonance. Besides, the interface polarization formed by abundant heterointerfaces between Mo 2 C and Co/C was confirmed using a high-frequency structure simulator. The adding amount of Mo-MOFs and pyrolysis temperature were found to have a significant influence on the impedance matching and microwave absorption. Consequently, the optimized Mo 2 C/Co/C nanorods displayed the strongest reflection loss (RL) of −54.6 dB at 16.2 GHz corresponding to a thickness of 1.77 mm. The SRL mt (RL/matching thickness) was calculated to be 30.9, exceeding those of reported MOF derivates. What is more, the Mo 2 C/Co/C nanorods exhibited broad and tunable bandwidth covering from the whole X band (8.0−12.08 GHz) to the Ku band (12.56−18.0 GHz) by adjusting the amount of Mo-MOFs and pyrolysis temperature, revealing great potential for fields of microwave absorption.

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Sintering-regulated two-dimensional plate@shell basalt@NiO heterostructure for enhanced microwave absorption

Cited by 23 publications

References 42 publications

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Polypyrrole-Coated Composites of Flower-Shaped NiCo₂O₄/Co₃O₄ Nanosheets for Microwave Absorption

Molybdenum Carbide/Cobalt Composite Nanorods via a “MOFs plus MOFs” Strategy for High-Efficiency Microwave Absorption

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Sintering-regulated two-dimensional plate@shell basalt@NiO heterostructure for enhanced microwave absorption

Cited by 23 publications

References 42 publications

Self‐Assembled MoS2 Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Self‐Assembled MoS2 Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Polypyrrole-Coated Composites of Flower-Shaped NiCo2O4/Co3O4 Nanosheets for Microwave Absorption

Molybdenum Carbide/Cobalt Composite Nanorods via a “MOFs plus MOFs” Strategy for High-Efficiency Microwave Absorption

Contact Info

Product

Resources

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Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Self‐Assembled MoS₂ Cladding for Corrosion Resistant and Frequency‐Modulated Electromagnetic Wave Absorption Materials from X‐Band to Ku‐Band

Polypyrrole-Coated Composites of Flower-Shaped NiCo₂O₄/Co₃O₄ Nanosheets for Microwave Absorption