Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 61, Issue 4, Pages 1684-1693Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c03585
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Funding
- National Natural Science Foundation of China [51703137]
- Fund Project of Equipment Pre-Research Field [61409220114]
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A porous hybrid carbon aerogel with excellent attenuation performance has been fabricated through a directional freeze-casting process and a carbonization process. The optimized aerogel demonstrates extraordinary microwave absorption performance and is suitable for applications in the microwave absorption field.
Here, a porous hybrid carbon aerogel (CNS/Co@ NCNTs) is fabricated by growing cobalt nanoparticles in N-doped carbon nanotubes on three-dimensional (3D) continuous carbon nanosheets through a directional freeze-casting process and a carbonization process. The resulting hybrid carbon aerogels exhibit excellent attenuation performance owing to a unique 3D porous structure with a large surface, multiple interfaces, abundant defects, and efficient electron conductivity. Consequently, the optimized CNS/Co@NCNT-900 aerogel demonstrates extraordinary micro-wave absorption (MA) performance in terms of minimum reflection loss (-27.5 dB) and effective absorption bandwidth (7.4 GHz). This work proposes a novel approach for designing and fabricating highly effective magnetic porous hybrid carbon aerogels to be applied in MA fields.
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