Facile fabrication of Fe/Fe3C@starch-derived hierarchical porous carbon for microwave absorption

The three-dimensional (3D) porous carbon materials are helpful for forming thin, light-weight, wide effective absorption bandwidth and strong absorption intensity absorbers. However, previous methods were not environmentally friendly enough. Thus, in this work, the Fe/Fe 3 C@porous carbon was synthe...

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Veröffentlicht in:Journal of materials science. Materials in electronics 2024, Vol.35 (2), p.131, Article 131
Hauptverfasser: Hua, Wanlu, Hu, Chunyan, Xie, Xiaoli, Gou, Guangjun
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Sprache:eng
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Zusammenfassung:The three-dimensional (3D) porous carbon materials are helpful for forming thin, light-weight, wide effective absorption bandwidth and strong absorption intensity absorbers. However, previous methods were not environmentally friendly enough. Thus, in this work, the Fe/Fe 3 C@porous carbon was synthesized from soluble starch and Fe(NO 3 ) 3 ·9H 2 O via chemical bowling and subsequent carbonization at 700 °C with different ratios. When the ratio of starch to Fe(NO 3 ) 3 ·9H 2 O is 1:1.5, the porous carbon exhibits a strong absorption ability with minimum reflection loss ( RL min ) value of −16.64 dB at 16.78 GHz, when the thickness is 1.75 mm and the proportion of paraffin wax is 30 wt%. The synergy of well impedance matching, sufficient loss performance, and interface polarization makes 3D porous carbon materials an excellent wave absorber. This work provides a good inspiration for studying outstanding performance microwave absorption materials.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-023-11830-8