Synthesis of super-hydrophobic and self-cleaning magnetic graphene aerogel with excellent microwave absorption properties

The well-established structure and ultra-fine nanoparticles are vital for high-performance microwave absorption materials . Herein, three-dimensional hydrophobic graphene aerogels decorated with ultra-fine Fe 3 O 4 nanocrystals composites (HGAFX, X stands for pyrolysis temperature) were successfully constructed via chemically self-assembly and in situ pyrolysis. Remarkably, the hybrids with only 5% filling contents exhibited excellent microwave absorption performance (MAP) in terms of both minimum reflection loss ( RL min ) and effective absorption bandwidth ( EAB ), outperforming the most reported microwave absorbers. Moreover, the magnetic graphene aerogels composites possess strong hydrophobicity , endowing them attractive functions of self-cleaning, waterproof, anti-icing, and corrosion resistance . Importantly, experimental results and theoretical calculations indicate that superior MAP can be carried out by reasonably regulating the electromagnetic parameters . Considering the excellent absorption capacities , our strategy opened a novel way for anchoring ultra-small nanoparticles on graphene sheets as highly effective synergistic microwave absorbers at low filling contents.