Facile synthesis of ordered mesoporous carbons with high thermal stability by self-assembly of resorcinol-formaldehyde and block copolymers under highly acidic conditions

被引:304
作者
Wang, Xiqing [1 ]
Liang, Chengdu [1 ]
Dai, Sheng [1 ]
机构
[1] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA
关键词
D O I
10.1021/la800529v
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The effect of phenols reactivity with formaldehyde on the formation of ordered mesoporous carbons has been investigated. A strategy to accelerate the polymerization of phenolic resins by using strongly acidic conditions is proposed. The self-assembly of resorcinol-formaldehyde and block copolymers (e.g., F127) under highly acidic concentrations (e.g., 1.5 M HCl) is probably driven by the I+X-S+ mechanism and hydrogen bonding and affords a highly reproducible approach for synthesis of ordered mesoporous carbons. The synthesis can be readily scaled up with no change in sample quality. The carbon material obtained (denoted as C-ORNL-1) exhibits highly ordered hexagonal mesostructure, with a typical BET surface area of similar to 600 m(2)/g, pore size of 6.3 nm, and pore volume of similar to 0.60 cm(3)/g. One of the unique structural features of C-ORNL-1 is its high thermal stability; it can be graphitized at 2600 degrees C while considerable mesoporosity is maintained.
引用
收藏
页码:7500 / 7505
页数:6
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