Abstract
N-doped raspberry-like MWCNT/Fe2O3 composites were synthesized by a simple two-step method. The Prussian blue (PB) precursor generated a uniform cube structure with a diameter of 1 µm under hydrothermal conditions, which was partly interspersed by multi-walled carbon nanotubes (MWCNTs), and 3D porous composites were obtained after heat treatment. The influence of oxygen participation in calcination on the morphology, composition, and bandwidth of the composite was studied. The raspberry-like MWCNT/Fe2O3 was highly porous and had a large surface area of 123.53 m2·g–1. As an absorber, the composite exhibited a reflection loss (RLmin) of − 52.26 dB and an effective absorption bandwidth of 5.12 GHz (covering 85% of the Ku band) at a thickness of 1.5 mm. The results showed that the 3D N-doped raspberry-like MWCNT/Fe2O3 composite demonstrates high potential for use as a Ku-band microwave-absorbing materials (MAMs).
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant 51477002) and the University Synergy Innovation Program of Anhui Province (GXXT-2019-028).
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Xing, H., You, X., Liu, H. et al. Microwave absorption properties of N-doped raspberry-like MWCNT/Fe2O3 composites based on Prussian blue. J Mater Sci: Mater Electron 34, 1427 (2023). https://doi.org/10.1007/s10854-023-10822-y
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DOI: https://doi.org/10.1007/s10854-023-10822-y