Enhanced electromagnetic wave absorption of Fe3O4@C derived from spindle-like MOF

Magnetic carbon materials derived from metal organic frameworks (MOFs) have aroused extensive concern for electromagnetic wave absorbing application. In this study, we synthesized spindle-like Fe-MOF to acquire different compositions and microstructures by adjusting the pyrolysis temperature. The hierarchical spindle-like Fe3O4@C composite prepared at 600 degrees C (H600) possesses intriguing electromagnetic wave (EMW) absorption performance due to subtle synergy of carbon framework and Fe3O4 microspheres, as well as uniquely hierarchical porous structure. The maximum reflection loss of -54.9 dB is achieved and effective absorbing bandwidth (EAB) can attain 6.5 GHz (11.1-17.6 GHz) at 2.61 mm.

Automated summary

Magnetic carbon materials derived from metal organic frameworks (MOFs) have attracted extensive attention for their potential use in electromagnetic wave absorption. In this study, spindle-like Fe-MOFs with different compositions and microstructures were synthesized by adjusting the pyrolysis temperature. The hierarchical spindle-like Fe3O4@C composite prepared at 600 degrees C (H600) exhibits intriguing electromagnetic wave absorption performance due to the synergy of carbon framework, Fe3O4 microspheres, and the unique hierarchical porous structure. The maximum reflection loss achieved is -54.9 dB and the effective absorbing bandwidth extends from 11.1 to 17.6 GHz at a thickness of 2.61 mm.