Prussian blue derived N-doped porous carbon/Fe4N/rGO for broadband electromagnetic wave absorption

Prussian blue (PB) as a type of metal-organic framework has attracted widespread attention in the field of electromagnetic wave (EMW) absorption due to its adjustable composition and structure. N-doped porous carbon/rGO/Fe 4 N composite is prepared by carbonizing and nitriding PB precursor. Fe 4 N/rGO/NPC exhibits the minimum reflection loss (RL min ) is −53.09 dB at 16.16 GHz of 2.2 mm, with an effective absorption bandwidth (EAB) value of 7.84 GHz (10.16–18 GHz) at 2.6 mm. The EMW absorption mechanisms analysis displayed that excellent impedance matching and various attenuation pathways including magnetic loss, conduction loss, interfacial and dipole polarization synergistically contributed to the high EMW absorption performances. The results indicate that the Fe 4 N/rGO/NPC composite derived from PB precursor presents great potential in the field of EMW absorption.