期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 39, 页码 21183-21188出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm34590k
关键词
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资金
- National Natural Science Foundation of China [51001070, 51202145]
- Shanghai Science and Technology Committee [10JC1407600]
- 973 National Project [2011CB922202]
- Research Fund for the Doctoral Program of Higher Education of China
Using a kind of plant biomass (coconut shell) as template and carbon precursor, we prepare biomorphic porous carbon materials for electromagnetic interference shielding application. The carbon frameworks of the porous carbon materials are modified by in situ formation of graphitic nanostructures in a catalytic graphitization process, leading to well-tailored electrical conductivity of the resultant materials. The modified porous carbon materials exhibit shielding effectiveness of 40 dB over the X-band frequency, and the shielding by absorption is as high as 91%, indicating an absorption-dominant shielding mechanism. The high absorption contribution is attributed to the coupled effects of the biomorphic porous structures and graphitic nanostructures of the porous graphitic carbon.
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