期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 1, 页码 1228-1238出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b04907
关键词
Biomass; Lightweight; Activated carbon material; Hierarchical porous structure; Microwave absorption; Stealth
资金
- National Natural Science Foundation of China [51772063]
- Yuan Guang Scholar Plan of Hebei University of Technology
Lightweight, low-cost, and effective micro-wave -absorbing materials are important in electronics, communication, and military defense. Recently, microwave-absorbing materials stemming from biomass have drawn increasing attention for their sustainable properties, low cost, and high performances. In this work, loofah-sponge-derived carbon/CoFe2O4 composites have been prepared by functionalization and subsequent pyrolysis treatment. The porous composites prepared from the loofah sponge exhibit a typical lotus-root-like structure with low density. The composites exhibit an efficient absorption value of -43.8 dB at 8.3 GHz (X band) with a thickness of 3 mm. The high-performance absorption is ascribed to the synergistic attenuation effect of magnetic nanoparticles and dielectric lotus-root-like carbon substrate. The obtained results demonstrated that the loofah-sponge-derived carbon/CoFe2O4 composites with lotus-root-like microstructure have great potential to be lightweight and low-cost microwave-absorbing materials at elevated temperature.
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