Highly selective CO2 capture by S-doped microporous carbon materials |
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| Affiliation: | 1. Department of Chemistry, The City College of New York, 160 Convent Ave, New York, NY 10031, USA;2. Dpto. de Química Inorgánica, Universidad de Málaga, 29071, Spain;1. Department of Chemical Engineering, Widener University, One University Place, Chester, PA 19013, USA;2. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;1. College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China;2. Lab for New Fiber Materials and Modern Textile-Growing Base for State Key Laboratory, College of Chemical and Environmental Engineering, Qingdao University, Qingdao 266071, China |
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| Abstract: | 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 N2, CH4 and H2. 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 m2 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. |
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