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

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 alpha-manganese dioxide (alpha-MnO2) was successfully obtained via a facile hydrothermal method, and the EMW absorption performance of alpha-MnO2 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 MnO2 has promising candidates with a tunable EMW absorption performance for applications in the electromagnetic field in the future.

Automated summary

The morphology-controlled preparation of alpha-manganese dioxide (alpha-MnO2) was successfully achieved, and its electromagnetic wave absorption performance was investigated. The results showed that the Mn-1.0-120 sample exhibited the best electromagnetic wave absorption performance, indicating its potential applications.