Fe-based material@N-doped carbon composites as environment-friendly microwave absorbers

Abstract Environment-friendly Fe-based material@N-doped carbon nanoparticles imbedded in polylactic acid (PLA) matrix are prepared and applied microwave absorption field. In the synthesis process, polydopamine (PDA) precursor could rationally regulate phases of iron-based particles contents. It turns out that optimizing chemical composition plays a vital role modulating performance. For instance, maximum reflection loss (RLmax) for Fe@N-doped (S-120) reaches ?61.6 dB (12.56 GHz, 2.1 mm), effective bandwidth is 4.48 GHz (from 13.52 GHz to 18 GHz) with thickness only 1.7 mm. The excellent performance be attributed perfect impedance matching brought by synergies multiple components. Moreover, absorbers display not high but also environment-friendly characteristics can avoid leaving stubborn waste after failure. preparation process composite pollution-free PLA almost naturally degraded within one month under simulated marine environment. This work may provide new perspective on preparing high-efficient functional materials which harmless