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Microwave-based preparation and characterization of Fe-cored carbon nanocapsules with novel stability and super electromagnetic wave absorption performance

Wang, Yican; Wang, Wenlong; Sun, Jing; Sun, Chenggong; Feng, Yukun; Li, Zhe

Microwave-based preparation and characterization of Fe-cored carbon nanocapsules with novel stability and super electromagnetic wave absorption performance Thumbnail


Authors

Yican Wang

Wenlong Wang

Jing Sun

Chenggong Sun

Yukun Feng

Zhe Li



Abstract

Microwave-metal discharge was proposed as a facile methodology to prepare unique Fe-cored carbon nanocapsules (Fe@CNCs) with high purity, novel stability and extraordinary electromagnetic wave (EMW) absorption performance. The effect of microwave power, irradiation time and cyclohexane/ferrocene ratio on the production of Fe@CNCs was examined and the properties of the nanocapsules, such as their Fe content, phase, yield, degree of graphitization and associated microstructures were investigated in detail. It was found that the prepared Fe@CNCs, which can easily be separated from the reaction system, displayed exceedingly high electromagnetic wave (EMW) absorption performance over the 2–18 GHz range. At the minimal reflection loss (RL) values over −10 dB, the EMW absorption bandwidth can reach up to 13.8 GHz with an absorber thickness of 1.5–5 mm. In addition, novel thermo-oxidative stability and super anti-corrosion property were also obtained for the Fe@CNCs as no signs of any corrosion or oxidative degradation loss were observed from the accelerated degradation tests in air and acid at temperatures up to 420 °C. The exceedingly high EMW absorption performance coupled with the superior anti-degradation and anti-corrosion properties of the prepared nanocomposite microcapsules highlights the novel capability of microwave-metal discharge in synthesizing advanced metal-cored nanocarbon microcapsules with promising application potentials in diverse fields, such as but not limited to microwave absorption, EM shielding and advanced separations etc.

Journal Article Type Article
Acceptance Date Apr 11, 2018
Online Publication Date Apr 13, 2018
Publication Date Aug 31, 2018
Deposit Date May 16, 2018
Publicly Available Date Apr 14, 2019
Journal Carbon
Print ISSN 0008-6223
Electronic ISSN 0008-6223
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 135
DOI https://doi.org/10.1016/j.carbon.2018.04.026
Keywords Fe-cored carbon nanocapsules; Microwave-metal discharge; Preparation; Stability; Electromagnetic wave absorption
Public URL https://nottingham-repository.worktribe.com/output/949777
Publisher URL https://www.sciencedirect.com/science/article/pii/S0008622318303853

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