In-situ synthesis of layered coal-based carbon/Co porous magnetic composites with promising microwave absorption performance

2021 ◽  
Author(s):  
Yang Fan ◽  
Ximing Zhang ◽  
Jingyu Wang ◽  
Hengdong Ren ◽  
Yin Liu ◽  
...  
Keyword(s):  
Phase Composition ◽  
Chemical Composition ◽  
Microwave Absorption ◽  
In Situ Synthesis ◽  
Magnetic Composites ◽  
Microwave Absorbing Properties ◽  
In Situ Method ◽  
Absorption Performance ◽  
Microwave Absorption Performance

In this paper, light and ultra-thin coal-based carbon cobalt composites (CBC/Co) with excellent microwave absorbing properties were synthesized by using an in-situ method from anthracite. Phase composition and chemical composition...

Rationally designed hierarchical N-doped carbon nanotubes wrapping waxberry-like Ni@C microspheres for efficient microwave absorption

2021 ◽  
Author(s):  
Dawei Liu ◽  
Yunchen Du ◽  
Ping Xu ◽  
Fengyuan Wang ◽  
Yahui Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Composition ◽  
Microwave Absorption ◽  
Microstructure Design ◽  
Composition Modulation ◽  
Absorption Performance ◽  
Microwave Absorption Performance

The enhanced microwave absorption performance of composites benefits from simultaneous rational microstructure design and chemical composition modulation.

In situ growth of B4C nanowires on activated carbon felt to improve microwave absorption performance

2020 ◽  
Vol 116 (20) ◽  
pp. 203101
Author(s):  
Beibei Wang ◽  
Qiangang Fu ◽  
Qiang Song ◽  
Zhaoju Yu ◽  
Ralf Riedel
Keyword(s):  
Activated Carbon ◽  
Microwave Absorption ◽  
In Situ Growth ◽  
Carbon Felt ◽  
Absorption Performance ◽  
Microwave Absorption Performance

scholarly journals 3D Seed-Germination-Like MXene with In Situ Growing CNTs/Ni Heterojunction for Enhanced Microwave Absorption via Polarization and Magnetization

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiao Li ◽  
Wenbin You ◽  
Chunyang Xu ◽  
Lei Wang ◽  
Liting Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Seed Germination ◽  
Microwave Absorption ◽  
Magnetic Loss ◽  
Impedance Matching ◽  
Matching Condition ◽  
Ni Nanoparticles ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Highlights Benefiting from the possible “seed-germination” effect, the “seeds” Ni2+ grow into “buds” Ni nanoparticles and “stem” carbon nanotubes (CNTs) from the enlarged “soil” of MXene skeleton. Compared with the traditional magnetic agglomeration, the MXene-CNTs/Ni hybrids exhibit the highly spatial dispersed magnetic architecture. 3D MXene-CNTs/Ni composites hold excellent microwave absorption performance (−56.4 dB at only 2.4 mm). Abstract Ti3C2Tx MXene is widely regarded as a potential microwave absorber due to its dielectric multi-layered structure. However, missing magnetic loss capability of pure MXene leads to the unmatched electromagnetic parameters and unsatisfied impedance matching condition. Herein, with the inspiration from dielectric-magnetic synergy, this obstruction is solved by fabricating magnetic CNTs/Ni hetero-structure decorated MXene substrate via a facile in situ induced growth method. Ni2+ ions are successfully attached on the surface and interlamination of each MXene unit by intensive electrostatic adsorption. Benefiting from the possible “seed-germination” effect, the “seeds” Ni2+ grow into “buds” Ni nanoparticles and “stem” carbon nanotubes (CNTs) from the enlarged “soil” of MXene skeleton. Due to the improved impedance matching condition, the MXene-CNTs/Ni hybrid holds a superior microwave absorption performance of − 56.4 dB at only 2.4 mm thickness. Such a distinctive 3D architecture endows the hybrids: (i) a large-scale 3D magnetic coupling network in each dielectric unit that leading to the enhanced magnetic loss capability, (ii) a massive multi-heterojunction interface structure that resulting in the reinforced polarization loss capability, confirmed by the off-axis electron holography. These outstanding results provide novel ideas for developing magnetic MXene-based absorbers.

Air@rGO€Fe3O4 microspheres with spongy shells: self-assembly and microwave absorption performance

2016 ◽  
Vol 4 (44) ◽  
pp. 10518-10528 ◽  
Author(s):  
Qiang Zeng ◽  
Xu-hai Xiong ◽  
Ping Chen ◽  
Qi Yu ◽  
Qi Wang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Microwave Absorption ◽  
Self Assembly ◽  
Calcination Process ◽  
Emulsion Technique ◽  
Microwave Absorbing Properties ◽  
Absorption Performance ◽  
Microwave Absorbing ◽  
Fe3o4 Microspheres ◽  
Microwave Absorption Performance

Novel Air@rGO€Fe3O4 microspheres with excellent microwave absorbing properties and corrosion resistance were synthesized by a W/O emulsion technique followed by a calcination process.

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