期刊
CHEMPLUSCHEM
卷 79, 期 2, 页码 284-289出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201300359
关键词
adsorption; biomass; carbon fiber; microporous materials; renewable resources
资金
- National Basic Research Program of China [2012CB626806, 2011CB201403]
- International Science & Technology Cooperation Program of China [2011DFA51980]
- National Science Foundation of China [21276266]
- Natural Science Foundation of Shanxi Province [2011011023-1]
- Strategic Priority Research Program-Climate Change: Carbon Budge and Related Issues (Chinese Academy of Sciences) [XDA05010201]
- Foundation of State Key Laboratory of Coal Conversion [J12-13-309]
Porous carbon fiber with hollow structure and hydrophilic groups was successfully prepared from cotton. The structures and surface chemical properties of the porous carbon fiber were characterized by nitrogen adsorption isotherms, thermogravimetry, FTIR spectroscopy, and scanning electron microscopy. The morphologies of porous carbons prepared under different conditions were observed and compared. The resulting porous carbons had a microporous structure with a pore size distribution around 0.7-2.0nm. The pyrolysis and decomposition of cotton to form a condensation cross-linked ring structure took place from 230 to 350 degrees C. Nitrogen-containing groups could be incorporated into the carbon matrix by urea decomposition during the carbonization process. The porous carbon contained more hydrophilic groups and its fiber structure was kept; the carbon yield was improved in the presence of KOH/urea. The porous carbon fiber showed high adsorption capacities of CO2 as a result of its surface hydrophilic groups and developed pore structure.
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