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Confined Tuning Hierarchical Core–Shell Architectures of Multi-Walled Carbon Nanotubes Wrapped by MnO~2~ Sheets with High-Performance Microwave Absorption by Ran Shi; Honglong Xing; Ye Liu; Xiaoli Ji is a Materials Science article available to read on EtoBox.

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Hierarchical core–shell architectures with multi-walled carbon nanotubes as core and MnO~2~ sheets shaped in an array mode as shell (MWCNTs@MnO~2~) were successfully synthesized via a simple wet chemical method. X-ray diffraction patterns and X-ray photoelectron spectroscopy analysis revealed that the composites were successfully prepared. Morphological characterizations were made by scanning electron microscopy and transmission electron microscopy. Vector network analyzer was employed to investigate the electromagnetic parameters of the composites. A possible attenuation mechanism was discussed, and the high-performance microwave absorption properties were attributed to the porous microstructure, polarization effect, dielectric loss and the synergistic action between MWCNTs and [Formula: see text]-MnO~2~. A minimum reflection loss (RL) of [Formula: see text]50.6[Formula: see text]dB was achieved at a thickness of 1.4[Formula: see text]mm, and an effective absorption bandwidth ([Formula: see text][Formula: see text]dB) covered 4.2[Formula: see text]GHz (from 13.8[Formula: see text]GHz to 18[Formula: see text]GHz) at a thickness of 1.3[Formula: see text]mm. Therefore, these results

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Author

Ran Shi; Honglong Xing; Ye Liu; Xiaoli Ji

Publisher

World Scientific Publishing Company; World Scientific ; World Scientific Publishing Co.; World Scientific Pub Co Pte Lt (ISSN 1793-2920)

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)