Morphology‐controlled preparation and tunable electromagnetic wave absorption performance of manganese dioxide nanostructures

Abstract The development of electromagnetic wave (EMW) absorption materials with lightweight, wide absorption bandwidth, thin thickness, and strong EMW absorption performance has become a hotspot. Herein, the morphology‐controlled preparation of α‐manganese dioxide (α‐MnO 2 ) was successfully obtained via a facile hydrothermal method, and the EMW absorption performance of α‐MnO 2 was investigated in detail. The results indicated the as‐obtained Mn‐1.0‐120 possessed the best EMW absorption performance with minimum reflection loss of −53.43 dB at about 5.2 GHz with a thickness of 4.1 mm originated from the synergistic effects of multiply scattering, dielectric loss, and magnetic loss. This contribution demonstrates that the MnO 2 has promising candidates with a tunable EMW absorption performance for applications in the electromagnetic field in the future.