Journal
CARBON
Volume 152, Issue -, Pages 827-836Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.06.080
Keywords
Carbon foam; Microwave absorption; Biomass; Porous structure
Funding
- National Natural Science Foundation of China [51407134, 51801001]
- Natural Science Foundation of Shandong Province [ZR2019YQ24]
- China Postdoctoral Science Foundation [2016M590619, 2016M601878]
- Provincial Key Research and Development Program of Shaanxi [2019GY-197]
- Key Project of Baoji University of Arts and Sciences [ZK2018051]
- Thousand Talents Plan
- World-Class University and Discipline
- Taishan Scholar's Advantageous and Distinctive Discipline Program of Shandong Province
- World-Class Discipline Program of Shandong Province
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The novel three-dimensional (3D) co-doped carbon foam was fabricated via a facile hydrothermal and subsequent pyrolysis process using fish skin as carbon precursor. The fish-derived carbon foam (CFs) obtained at 650 degrees C (CFs-650) possesses large specific surface area of 1369.3 m(2)/g with natural inherited micropore-dominate porosity. Moreover, the heteroatoms O and N in the fish skin are uniformly planted into the carbon frameworks, which is highly advantageous for the attenuation of microwave energy. The unique architecture endows the 3D carbon foam with impressive microwave absorbing property. Especially, the broadest bandwidth (RL < -10 dB) of CFs-650 can be up to 8.6 GHz (9.4-18 GHz) at 3 mm with the minimum reflection loss (RL) of -33.5 dB. The optimal RL of CFs-650 is -52.6 dB at 15.8 GHz with the matching thickness of 2.6 mm. The mechanism of the microwave absorption of the carbon foam is attributed to electric conductive loss, interfacial polarization relaxation, multiple reflections and scattering. The low-cost and eco-friendly carbon foam has great potential for application of microwave absorption. (C) 2019 Elsevier Ltd. All rights reserved.
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