Multi-dimensional C@NiCo-LDHs@Ni aerogel: Structural and componential engineering towards efficient microwave absorption, anti-corrosion and thermal-insulation

Wang, Yan; Di, Xiaochuang; Chen, Jian; She, Liaona; Pan, Hongge; Zhao, Biao; Che, Renchao

doi:10.1016/j.carbon.2022.02.016

Cited by 111 publications

(32 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure S4 shows the two-dimensional RL diagram of the samples, reflecting the change of absorption performance with thickness. The absorption peak moved to the low frequency with increased thickness, which indicated that it accorded with the quarter wavelength matching model. − …”

Section: Resultssupporting

confidence: 55%

Hollow ZnO/Fe₃O₄@C Nanofibers for Efficient Electromagnetic Wave Absorption

Zeng

Qiao

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

A type of hollow core–shell ZnO/Fe3O4@C fibers were fabricated by a facile combination of electrospinning, calcination, and pyrolytic pyrrole-derived carbon coating. The combination of ZnO/Fe3O4 fibers and carbon nanolayer improved the dielectric loss capability of the nanocomposites and obtained good impedance matching, leading to excellent electromagnetic wave (EMW) absorption performance. The minimum reflection loss of the ZnO/Fe3O4@C nanocomposites reached −74.2 dB at a thickness of merely 2.2 mm, and the effective absorption bandwidth reached 5.5 GHz at a matching thickness of 2.1 mm. Compared with the ZnO- or Fe3O4-based composites ever reported, our ZnO/Fe3O4@C nanocomposites exhibited superior EMW absorption characteristics due to the efficient design of multiple synergistical components and hollow fibrous structures. Combined with the facile, scalable preparation approach, the hollow core–shell ZnO/Fe3O4@C nanocomposite fibers with high EMW absorption performance show great potential for EMW absorption applications.

show abstract

Section: Resultssupporting

confidence: 55%

Hollow ZnO/Fe₃O₄@C Nanofibers for Efficient Electromagnetic Wave Absorption

Zeng

Qiao

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The attenuation constant (α) is also an important parameter that indicates the performance of a microwave absorber and can be calculated using eq . High dielectric loss and magnetic loss provide a high value of α and signify the capability of the absorber to dissipate microwave. − Figure S17 displays the attenuation constant curve for PA, CF, 60PA-40CF, and (60PA-40CF) 90 -Gr 10 . The higher values of α for the (60PA-40CF) 90 -Gr 10 nanocomposite than the PA, CF, and 60PA-40CF reveal that this nanocomposite possesses stronger capability.…”

Section: Resultsmentioning

confidence: 99%

CoFe₂O₄ Nanoparticles Grown within Porous Al₂O₃ and Immobilized on Graphene Nanosheets: A Hierarchical Nanocomposite for Broadband Microwave Absorption

et al. 2022

View full text Add to dashboard Cite

Demands to develop efficient microwave-absorbing materials are increasing with the advancement of information technology and the exponential rise in the usage of electromagnetic devices. To reduce electromagnetic interference and to overcome the adverse effects caused by microwave exposure resulting from the excessive usage of electromagnetic devices, microwave absorbers are very necessary. In addition, radar-absorbing materials are essential for stealth technology in military applications. Herein, we report a nanocomposite in which CoFe 2 O 4 (CF) nanoparticles were grown within the porous structure of Al 2 O 3 (PA), and this CoFe 2 O 4 -loaded Al 2 O 3 (PA–CF) nanocomposite was immobilized on the surface of nanometer-thin graphene sheets (Gr). Owing to the hierarchical structure created by the constituents, the (60PA-40CF) 90 -Gr 10 nanocomposite exhibited excellent microwave-absorption properties in the X-band region with a reflection loss (RL) value of ∼−30.68 dB (∼99.9% absorption) at 10.71 and 9.04 GHz when thicknesses were 2.0 and 2.3 mm, respectively. This nanocomposite demonstrated its competence as a lightweight, high-performance microwave absorber in the X-band region, which can be utilized in the applications of pioneering stealth technology.

show abstract

“…In general, the dielectric loss tangent (tan δ ε = ε″/ε′) and magnetic loss tangent (tan δ μ = μ″/μ′) represent the dissipation of electrical and magnetic energy, respectively. The EMW attenuation can be evaluated from the combination of dielectric and magnetic losses, and an attenuation constant (α) defined according to eq : α = 2 π f c × ( μ ″ ε ″ − μ ′ ε ′ ) + false( μ ″ ε ″ − μ true′ ε true′ false) 2 + false( μ ″ ε true′ + μ true′ ε ″ false) 2 …”

Section: Results and Discussionmentioning

confidence: 99%

Facile Preparation of Ti₃C₂T_x MXene@Zn–Mn Ferrite Composites with Enhanced Microwave Absorption Performance

Peng

Guo

et al. 2022

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

With the development of the fifth-generation (5G) communication technology, electromagnetic wave pollution in the military and civilian fields is becoming increasingly severe. To achieve highly efficient electromagnetic wave absorption (EMA), electromagnetic wave absorbing materials must be studied, including composites with both electric and magnetic loss mechanisms. Here, Ti3C2T x MXene@Zn–Mn ferrite (MXene@ZMF) composites were prepared by using a facile coprecipitation method incorporating magnetic ZMF nanoparticles coated onto the surface or inserted into the multilayers of MXene. The dielectric and magnetic losses and good impedance matching of these MXene@ZMF composites enhanced microwave absorption. The microwave absorption mechanism was established. The composite with 80 wt % MXene (denoted as MXene@ZMF-80%) exhibits enhanced EMA performance with a minimum reflection loss (RL min) of −69.86 dB at a frequency of 16.93 GHz and a maximum effective absorption bandwidth of 2.32 GHz. Therefore, this work provides a simple method for the design and fabrication of hybrid microwave absorbers employing dielectric and magnetic losses, beneficial for solving electromagnetic pollution problems.

show abstract

Multi-dimensional C@NiCo-LDHs@Ni aerogel: Structural and componential engineering towards efficient microwave absorption, anti-corrosion and thermal-insulation

Cited by 111 publications

References 54 publications

Hollow ZnO/Fe₃O₄@C Nanofibers for Efficient Electromagnetic Wave Absorption

Hollow ZnO/Fe₃O₄@C Nanofibers for Efficient Electromagnetic Wave Absorption

CoFe₂O₄ Nanoparticles Grown within Porous Al₂O₃ and Immobilized on Graphene Nanosheets: A Hierarchical Nanocomposite for Broadband Microwave Absorption

Facile Preparation of Ti₃C₂T_x MXene@Zn–Mn Ferrite Composites with Enhanced Microwave Absorption Performance

Contact Info

Product

Resources

About

Multi-dimensional C@NiCo-LDHs@Ni aerogel: Structural and componential engineering towards efficient microwave absorption, anti-corrosion and thermal-insulation

Cited by 111 publications

References 54 publications

Hollow ZnO/Fe3O4@C Nanofibers for Efficient Electromagnetic Wave Absorption

Hollow ZnO/Fe3O4@C Nanofibers for Efficient Electromagnetic Wave Absorption

CoFe2O4 Nanoparticles Grown within Porous Al2O3 and Immobilized on Graphene Nanosheets: A Hierarchical Nanocomposite for Broadband Microwave Absorption

Facile Preparation of Ti3C2Tx MXene@Zn–Mn Ferrite Composites with Enhanced Microwave Absorption Performance

Contact Info

Product

Resources

About

Hollow ZnO/Fe₃O₄@C Nanofibers for Efficient Electromagnetic Wave Absorption

Hollow ZnO/Fe₃O₄@C Nanofibers for Efficient Electromagnetic Wave Absorption

CoFe₂O₄ Nanoparticles Grown within Porous Al₂O₃ and Immobilized on Graphene Nanosheets: A Hierarchical Nanocomposite for Broadband Microwave Absorption

Facile Preparation of Ti₃C₂T_x MXene@Zn–Mn Ferrite Composites with Enhanced Microwave Absorption Performance