Highly selective CO2 capture by S-doped microporous carbon materials

被引:238
作者
Seema, Humaira [1 ]
Kemp, K. Christian [1 ]
Le, Nhien H. [1 ]
Park, Sung-Woo [1 ]
Chandra, Vimlesh [1 ]
Lee, Jung Woo [1 ]
Kim, Kwang S. [1 ]
机构
[1] Pohang Univ Sci & Technol, Dept Chem, Ctr Superfunct Mat, Pohang 790784, South Korea
关键词
GRAPHENE OXIDE; ADSORPTION; ACTIVATION; NANOTUBES; DIOXIDE; MECHANISMS; FRAMEWORKS; COVALENT; HYDROGEN; STORAGE;
D O I
10.1016/j.carbon.2013.09.006
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
S-doped microporous carbon materials were synthesized by the chemical activation of a reduced-graphene-oxide/poly-thiophene material. The material displayed a large CO2 adsorption capacity of 4.5 mmol g(-1) at 298 K and 1 atm, as well as an impressive CO2 adsorption selectivity over N-2, CH4 and H-2. The material was shown to exhibit a stable recycling adsorption capacity of 4.0 mmol g(-1). The synthesized material showed a maximum specific surface area of 1567 m(2) g(-1) and an optimal CO2 adsorption pore size of 0.6 nm. The microporosity, surface area and oxidized S content of the material were found to be the determining factors for CO2 adsorption. These properties show that the as synthesized S-doped microporous carbon material can be more effective than similarly prepared N-doped microporous carbons in CO2 capture. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:320 / 326
页数:7
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