Enhanced Microwave Absorption Performance of Coated Carbon Nanotubes by Optimizing the Fe3O4 Nanocoating Structure

2017 ◽  
Vol 9 (3) ◽  
pp. 2973-2983 ◽  
Author(s):  
Na Li ◽  
Gui-Wen Huang ◽  
Yuan-Qing Li ◽  
Hong-Mei Xiao ◽  
Qing-Ping Feng ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Absorption Performance ◽  
Coated Carbon ◽  
Microwave Absorption Performance

scholarly journals Correction to “Enhanced Microwave Absorption Performance of Coated Carbon Nanotubes by Optimizing the Fe3O4 Nanocoating Structure”

2018 ◽  
Vol 10 (22) ◽  
pp. 19278-19278 ◽  
Author(s):  
Na Li ◽  
Gui-Wen Huang ◽  
Yuan-Qing Li ◽  
Hong-Mei Xiao ◽  
Qing-Ping Feng ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Absorption Performance ◽  
Coated Carbon ◽  
Microwave Absorption Performance

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.

Investigations on structure-dependent microwave absorption performance of nano-Fe3O4 coated carbon-based absorbers

Carbon ◽  
2019 ◽  
Vol 144 ◽  
pp. 216-227 ◽  
Author(s):  
Na Li ◽  
Guiwen Huang ◽  
Hongmei Xiao ◽  
Qingping Feng ◽  
Shaoyun Fu
Keyword(s):  
Microwave Absorption ◽  
Absorption Performance ◽  
Nano Fe3o4 ◽  
Coated Carbon ◽  
Microwave Absorption Performance ◽  
Carbon Based

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.

Microwave Absorption and Magnetic Properties of Cobalt Ferrites/Carbon Nanotubes Nanocomposites

NANO ◽  
2015 ◽  
Vol 10 (05) ◽  
pp. 1550070 ◽  
Author(s):  
B. B. Zhang ◽  
P. F. Wang ◽  
J. C. Xu ◽  
Y. B. Han ◽  
H. X. Jin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Properties ◽  
Microwave Absorption ◽  
Network Analyzer ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Cobalt Ferrites ◽  
Structure Morphology ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Owing to the unique microstructure and the excellent dielectric properties, carbon nanotubes (CNTs) were decorated with CoFe 2 O 4 nanoparticles to synthesize the CoFe 2 O 4/CNTs nanocomposites by the solvothermal method. The phase structure, morphology, magnetic properties and microwave absorption performance of the as-prepared CoFe 2 O 4/CNTs were characterized and discussed by X-ray diffraction (XRD), thermal gravity analysis (TGA), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and vector network analyzer (VNA). All results indicated that the diameter of CoFe 2 O 4 nanoparticles decorating on the surface of CNTs increased with the solvothermal temperature. CoFe 2 O 4/CNTs prepared at 180°C, 200°C and 220°C exhibited superparamagnetism, while the other samples presented ferromagnetism at room temperature. And with the increasing solvothermal temperature, the saturation magnetization and coercivity increased up to 72 emu/g and 2000 Oe for the sample prepared at 260°C (S-26). And the reflection loss of CoFe 2 O 4/CNTs nanocomposites increased with the solvothermal temperature up to -15.7 dB for S-26 with the bandwidth of 2.5 GHz.

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