Graphene aerogel induced by ethanol-assisted method for excellent electromagnetic wave absorption

Graphene aerogels with three-dimensional network structure exhibit excellent electromagnetic (EM) wave attenuation capacity and are often designed as EM-absorbing materials. However, the fabrication processes of these materials are generally sophisticated and time-consuming. Herein, a series of grap...

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Bibliographic Details
Published in:Journal of materials science 2022, Vol.57 (1), p.453-466
Main Authors: Shi, Shuangqiang, Ren, Sue, Hao, Sijia, Chen, Yubin, Yang, Cheng, Dai, Shenglong
Format: Article
Language:English
Subjects:
Absorption
Acetaldehyde
Aerogels
Alcohol
Alcohol, Denatured
Analysis
Characterization and Evaluation of Materials
Chemical composition
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Electric waves
Electromagnetic radiation
Electromagnetic waves
Electromagnetism
Electronic Materials
Ethanol
Graphene
Graphite
Materials Science
Methods
Microstructure
Polymer Sciences
Solid Mechanics
Wave attenuation
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Summary:Graphene aerogels with three-dimensional network structure exhibit excellent electromagnetic (EM) wave attenuation capacity and are often designed as EM-absorbing materials. However, the fabrication processes of these materials are generally sophisticated and time-consuming. Herein, a series of graphene aerogels are synthesized successfully through a simple modified hydrothermal method using ethanol and water as the solvent. The effects of the volume ratio of ethanol-to-water (EtOH/H 2 O) on the chemical compositions, microstructures, and EM absorption properties of the aerogels are investigated. Results demonstrate that the microstructure and EM-absorbing ability are strongly dependent on the volume ratio of EtOH/H 2 O, and the best performance is obtained with EtOH/H 2 O of 1:1. Owing to the optimized ratio, the aerogel with 4.1 mg/ml exhibits a remarkable minimum reflection loss of − 52.6 dB and a broad efficient absorption bandwidth of 7.65 GHz under an ultralow filler content (3 wt%), showing obvious advantages compared with most graphene-based absorbers. This work reveals that the graphene aerogel prepared through this ethanol-assisted hydrothermal protocol is a promising candidate for lightweight and economical EM absorption material.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-021-06461-5