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

作者：Qian, Junjie; Du, Bin^*; He, Chao; Cai, Mei; Zhong, Xinrong; Ren, Sizhu; Lou, Jiayi; Shui, Anze^*

来源：Journal of the American Ceramic Society, 2022, 105(5): 3339-3352.

DOI：10.1111/jace.18296

• electromagnetic wave absorption performance
• hydrothermal reaction
• MnO2

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.