Abstract
The design and fabrication of biomass derived flower-like Co@Co3O4/carbon (Co@Co3O4/C) composites used for high-performance microwave absorbing materials are described. The porous carbon skeleton provides the electronic pathway and the nucleation locus for Co@Co3O4 nanoparticles. Meanwhile, the porous Co@Co3O4/C composites comprising dielectric and magnetic components could also improve impedance matching and be advantageous to electromagnetic energy conversion. Labeled with good impedance matching and strong attenuation characteristics, Co@Co3O4/C composites show excellent microwave response where the minimum reflection loss (RLmin) of −46.4 dB and the maximum effective absorption bandwidth of 11.0 GHz can be achieved. This work not only explores high-performance microwave absorbing materials but also demonstrates that shrimp shell derived materials can be regarded as unexceptionably sustainable resources.
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