Fe Single-Atoms Combined with Chitosan for Enhanced Electromagnetic Wave Absorption

Abstract On account of that the single carbon material possess exceeding electrical conductivity, which will cause impedance mismatch and thus seriously affects the electromagnetic wave (EMW) absorption performance of the material. Therefore, it is an effective method to combine carbon material with magnetic material to make the material have dielectric loss and magnetic loss at the same time. In this paper, magnetic Fe nanospheres were loaded onto the conductive network of chitosan and the composite 800Fe-Chitosan was obtained through freeze drying and calcination treatment. As a result, the composite shows superior EMW absorption performance with a reflection loss (RL) of -40.22 dB and a broad effective absorption bandwidth (EAB) of 4.24 GHz.