期刊
SCIENTIFIC REPORTS
卷 4, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/srep05711
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资金
- NSF of China [21271172]
- One Hundred Talent Project'' from Chinese Academy of Sciences
- NSF of Fujian Province [2012J01058]
Four nanoporous carbons prepared by direct carbonization of non-permanent highly porous MOF [Zn-3(BTC)(2)center dot(H2O)(3)](n) without any additional carbon precursors. The carbonization temperature plays an important role in the pore structures of the resultant carbons. The Brunauer-Emmett-Teller (BET) surface areas of four carbon materials vary from 464 to 1671 m(2) g(-1) for different carbonization temperature. All the four carbon materials showed a mesoporous structure centered at ca. 3 nm, high surface area and good physicochemical stability. Hydrogen, methane and carbon dioxide sorption measurements indicated that the C1000 has good gas uptake capabilities. The excess H-2 uptake at 77 K and 17.9 bar can reach 32.9 mg g(-1) and the total uptake is high to 45 mg g(-1). Meanwhile, at 95 bar, the total CH4 uptake can reach as high as 208 mg g(-1). Moreover the ideal adsorbed solution theory (IAST) prediction exhibited exceptionally high adsorption selectivity for CO2/CH4 in an equimolar mixture at 298 K and 1 bar (S-ads = 27) which is significantly higher than that of some porous materials in the similar condition.
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