Facile synthesis and enhanced electromagnetic microwave absorption performance for porous core-shell Fe3O4@MnO2 composite microspheres with lightweight feature
Porous core-shell Fe3O4@MnO2 composite microspheres have been synthesized. The BET specific surface area is 167 m2/g. The pore width is mainly distributed in the range of 2.0–12.0 nm. They possess the strongest RL peak of −42.6 dB (5.7 GHz) at loading 10 wt%. The excellent absorbing bandwidth is located in the 10.2–15.0 and 15.5–17.3 GHz.