Back to Search
Start Over
In situ growth and pyrolysis synthesis of super-hydrophobic graphene aerogels embedded with ultrafine β-Co nanocrystals for microwave absorption
- Source :
- Journal of Materials Chemistry C. 7:3869-3880
- Publication Year :
- 2019
- Publisher :
- Royal Society of Chemistry (RSC), 2019.
-
Abstract
- High-performance, lightweight, and broadband microwave absorption materials have drawn significant research focus. Graphene aerogels may give us inspiration for the design of highly efficient synergistic microwave absorption materials due to their low density and adjustable dielectric properties along with tunable porosity, providing abundant active sites for supporting functional magnetic components. Herein, we report a facile chemical reduction-assembly route, followed by in situ thermal decomposition for the fabrication of super-hydrophobic magnetic graphene aerogels. Owing to the improved attenuation characteristic and the synergistic effect, the fabricated magnetic graphene aerogels exhibited greatly enhanced microwave absorption performance. The hybrids with only 4.25 wt% of functional fillers reached a minimum reflection loss value of −51.6 dB at 14.6 GHz with an absorber thickness of 2.4 mm and a maximum effective absorption bandwidth (EAB, below −10 dB) of 6.5 GHz. Compared with other reported graphene-based absorbers, such high-performance synergistic microwave absorbers that are super-hydrophobic and lightweight with low filler loading may rapidly increase the research interest for future practical applications.
- Subjects :
- Fabrication
Materials science
Graphene
business.industry
Reflection loss
02 engineering and technology
General Chemistry
Dielectric
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
law.invention
Nanocrystal
law
Materials Chemistry
Optoelectronics
0210 nano-technology
Absorption (electromagnetic radiation)
business
Porosity
Microwave
Subjects
Details
- ISSN :
- 20507534 and 20507526
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry C
- Accession number :
- edsair.doi...........43101250305062bd3faf3b3a74639820