CoFe2O4 nanoparticles decorated MoS2-reduced graphene oxide nanocomposite for improved microwave absorption and shielding performance

Prasad, Jagdees; Singh, Ashwani Kumar; Haldar, Krishna Kamal; Tomar, Monika; Gupta, Vinay; Singh, Kedar

doi:10.1039/c9ra03465j

Cited by 45 publications

(23 citation statements)

References 46 publications

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“…Sample 5 with the highest graphene content has the best attenuation ability for the electromagnetic wave, and its loss tangent value reaches 304.85. With the increase of graphene content, the number of electrons, ions, and intrinsic dipoles, and the attenuation ability of the electromagnetic waves became enhanced [37,38]. The attenuation ability of sample 3 to electromagnetic waves was better than that of sample 4, which was similar to Figure 3b.…”

Section: The Loss Tangent Valuesupporting

confidence: 66%

A Flexible Sandwich Structure Carbon Fiber Cloth with Resin Coating Composite Improves Electromagnetic Wave Absorption Performance at Low Frequency

Liu

Jing

et al. 2022

Polymers

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In order to improve the electromagnetic wave absorbing performance of carbon fiber cloth at low frequency and reduce the secondary pollution caused by the shielding mechanism, a flexible sandwich composite was designed by a physical mixing coating process. This was composed of a graphene layer that absorbed waves, a carbon fiber cloth layer that reflected waves, and a graphite layer that absorbed transmitted waves. The influence of the content of graphene was studied by a control variable method on the electromatic and mechanical properties. The structures of defect polarization relaxation and dipole polarization relaxation of graphene, the interfacial polarization and electron polarization of graphite, the conductive network formed in the carbon fiber cloth, and the interfacial polarization of each part, combined together to improve the impedance matching and wave multiple reflections of the material. The study found that the sample with 40% graphene had the most outstanding absorbing performance. The minimum reflection loss value was −18.62 dB, while the frequency was 2.15 GHz and the minimum reflection loss value compared to the sample with no graphene increased 76%. The composites can be mainly applied in the field of flexible electromagnetic protection, such as the preparation of stealth tent, protective covers of electronic boxes, helmet materials for high-speed train drivers, etc.

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Section: The Loss Tangent Valuesupporting

confidence: 66%

A Flexible Sandwich Structure Carbon Fiber Cloth with Resin Coating Composite Improves Electromagnetic Wave Absorption Performance at Low Frequency

Liu

Jing

et al. 2022

Polymers

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“…This could be ascribed to the mismatch in complex permittivity and complex permeability of the shielding materials . In view of this, introducing hybrid nanostructures comprising carbonaceous materials, for example, RGO, CNT, CNF, and activated carbon, could overcome such problems. − Specifically, RGO could be an excellent choice due to its lightweight, good mechanical properties, high surface area, high dielectric constant, and superior electrical conductivity. ,, However, very limited work is reported on microwave absorption properties of MnCo 2 O 4 incorporated RGO nanocomposites …”

Section: Introductionmentioning

confidence: 99%

Fabrication of N-Doped Reduced Graphite Oxide/MnCo₂O₄ Nanocomposites for Enhanced Microwave Absorption Performance

Ghosh

Srivastava

2021

Langmuir

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The present work reports on the fabrication of a lightweight microwave absorber comprising MnCo2O4 prepared from the urea complex of manganese (Mn)/cobalt (Co) and nitrogen-doped reduced graphite oxide (NRGO) by facile hydrothermal method followed by annealing process and characterized. The phase analysis, compositional, morphological, magnetic, and conductivity measurements indicated dispersion of paramagnetic MnCo2O4 spherical particles on the surface of NRGO. Our findings also showed that Mn, Co–urea complex, and GO in the weight ratio of 1:4 (NGMC3) exhibited maximum shielding efficiency in the range of 55–38 dB with absorption as an overall dominant shielding mechanism. The reflection loss of NGMC3 was found to be in the range of −90 to −77 dB with minima at −103 dB (at 2.9 GHz). Such outstanding electromagnetic wave absorption performance of NRGO/MnCo2O4 nanocomposite compared to several other metal cobaltates could be attributed to the formation of percolated network assisted electronic polarization, interfacial polarization and associated relaxation losses, conductance loss, dipole polarization and corresponding relaxation loss, impedance matching, and magnetic resonance to some extent.

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“…• Nanoparticles formation is slow Hydrothermal method [41,[48][49][50][51][52][53][54][55][56] It involves substance crystallization at high temperature and pressure.…”

Section: Discussion Of Articlesmentioning

confidence: 99%

Preparation methods for Graphene, Metal and Polymer-based Composites for EMI Shielding Materials: State of the Art of Conventional and Machine Learning Methods

Ayub¹,

Guan²,

Ahmad³

et al. 2021

Preprint

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The electromagnetic inference is an issue from decades, where working for a better shielding material is still on-going. The purpose of this study is to review the existing methods in the formation of graphene, metal and polymer-based composites. Study indicates that in graphene and metal-based composites, the utilization of alternating deposition method showed the highest shielding effectiveness, whereas, in polymer-based composite, the utilization of chemical vapor deposition method showed highest shielding effectiveness. However, this review reveals that still there is a gap in the literature in terms of the selection of the method. Although there are various available methods which researchers adopt as per their convenience, none of the studies makes a comparison of the methods to form a similar composite. Therefore, as a future gap researcher needs to adopt various methods to form a single composite and then make a comparison of shielding effectiveness. This act will be useful for future researchers to select the appropriate method.

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CoFe₂O₄ nanoparticles decorated MoS₂-reduced graphene oxide nanocomposite for improved microwave absorption and shielding performance

Abstract: Magnetic CoFe2O4 nanoparticles decorated onto the surface of a MoS2-reduced graphene oxide (MoS2-rGO/CoFe2O4) nanocomposite were synthesized by a simple two-step hydrothermal method.

Cited by 45 publications

References 46 publications

A Flexible Sandwich Structure Carbon Fiber Cloth with Resin Coating Composite Improves Electromagnetic Wave Absorption Performance at Low Frequency

A Flexible Sandwich Structure Carbon Fiber Cloth with Resin Coating Composite Improves Electromagnetic Wave Absorption Performance at Low Frequency

Fabrication of N-Doped Reduced Graphite Oxide/MnCo₂O₄ Nanocomposites for Enhanced Microwave Absorption Performance

Preparation methods for Graphene, Metal and Polymer-based Composites for EMI Shielding Materials: State of the Art of Conventional and Machine Learning Methods

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CoFe2O4 nanoparticles decorated MoS2-reduced graphene oxide nanocomposite for improved microwave absorption and shielding performance

Abstract: Magnetic CoFe2O4 nanoparticles decorated onto the surface of a MoS2-reduced graphene oxide (MoS2-rGO/CoFe2O4) nanocomposite were synthesized by a simple two-step hydrothermal method.

Cited by 45 publications

References 46 publications

A Flexible Sandwich Structure Carbon Fiber Cloth with Resin Coating Composite Improves Electromagnetic Wave Absorption Performance at Low Frequency

A Flexible Sandwich Structure Carbon Fiber Cloth with Resin Coating Composite Improves Electromagnetic Wave Absorption Performance at Low Frequency

Fabrication of N-Doped Reduced Graphite Oxide/MnCo2O4 Nanocomposites for Enhanced Microwave Absorption Performance

Preparation methods for Graphene, Metal and Polymer-based Composites for EMI Shielding Materials: State of the Art of Conventional and Machine Learning Methods

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Product

Resources

About

CoFe₂O₄ nanoparticles decorated MoS₂-reduced graphene oxide nanocomposite for improved microwave absorption and shielding performance

Fabrication of N-Doped Reduced Graphite Oxide/MnCo₂O₄ Nanocomposites for Enhanced Microwave Absorption Performance