Electromagnetic Wave Absorption Property of Graphene with Fe3O4 Nanoparticles

2016 ◽  
Vol 16 (2) ◽  
pp. 1483-1490 ◽  
Author(s):  
Cheng Yang ◽  
Shenglong Dai ◽  
Xiaoyan Zhang ◽  
Tianyu Zhao ◽  
Shaojiu Yan ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Fe3o4 Nanoparticles ◽  
Absorption Property ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption

scholarly journals Enhanced electromagnetic wave absorption property of binary ZnO/NiCo2O4 composites

2021 ◽  
Author(s):  
Bin Du ◽  
Mei Cai ◽  
Xuan Wang ◽  
Junjie Qian ◽  
Chao He ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Dielectric Properties ◽  
Hydrothermal Reaction ◽  
Absorption Property ◽  
Absorption Properties ◽  
Promising Candidate ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Absorbing Materials ◽  
Minimum Reflection Loss

AbstractNowadays, metal oxide-based electromagnetic wave absorbing materials have aroused widely attentions in the application of telecommunication and electronics due to their selectable mechanical and outstanding dielectric properties. Herein, the binary ZnO/NiCo2O4 nanoparticles were successfully synthesized via hydrothermal reaction and the electromagnetic wave absorption properties of the composites were investigated in detail. As a result, benefiting from the dielectric loss, the as-obtained ZnO/NiCo2O4-7 samples possessed a minimum reflection loss value of −33.49 dB at 18.0 GHz with the thickness of 4.99 mm. This work indicates that ZnO/NiCo2O4 composites have the promising candidate applications in electromagnetic wave absorption materials in the future.

scholarly journals Reduced Graphene Oxide-Wrapped Super Dense Fe3O4 Nanoparticles with Enhanced Electromagnetic Wave Absorption Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 845
Author(s):  
Qi Yu ◽  
Yiyi Wang ◽  
Ping Chen ◽  
Weicheng Nie ◽  
Hanlin Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electromagnetic Wave ◽  
Electron Microscope ◽  
Reduced Graphene Oxide ◽  
Fe3o4 Nanoparticles ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
X Ray ◽  
Wave Absorption ◽  
Reduced Graphene

The efficient preparation of electromagnetic wave absorbing materials with low density and excellent electromagnetic wave absorption remains a considerable challenge. In this study, reduced graphene oxide (RGO) wrapped Fe3O4 nanoparticles (NPs) were synthesized based on one-step reaction by the reduction of graphene oxide (GO), and the generation of super-fine Fe3O4 NPs was achieved. The phase structure, chemical composition, micromorphology, and magnetism were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscope (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), and vibrating sample magnetometer (VSM), respectively. The electromagnetic characteristics were evaluated on a vector network analyzer by the coaxial line method. The results showed that super-fine Fe3O4 NPs with an average size of 6.18 nm are densely distributed on the surface of graphenes. The RGO/Fe3O4 nanocomposites exhibited excellent microwave absorption properties with a minimum reflection loss (RL) of up to −55.71 dB at 6.78 GHz at 3.5 mm thickness and the highest effective absorption bandwidth with RL values exceeding −10 dB is 4.76 GHz between 13.24 and 18 GHz at 1.7 mm thickness. This work provides a concise method for the development of RGO supported super dense Fe3O4 nanocomposites for high performance electromagnetic absorption applications.

Enhanced electromagnetic wave absorption induced by void spaces in hollow nanoparticles

Nanoscale ◽  
2018 ◽  
Vol 10 (39) ◽  
pp. 18742-18748 ◽  
Author(s):  
Feng Yan ◽  
Jianyu Kang ◽  
Shen Zhang ◽  
Chunyan Li ◽  
Chunling Zhu ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Wall Thickness ◽  
Absorption Property ◽  
Hollow Nanoparticles ◽  
Graphene Surface ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption

The NiCo2O4 hollow nanoparticles, with diameter and wall thickness of merely 10 and 2.5 nm, respectively, were anchored on the graphene surface, showing excellent electromagnetic wave absorption property.

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