Adsorption of CO2 and H-2 on Nitrogen-doped Porous Carbon from Ionic Liquid Precursor

作者：Zhang Lingna; Cai Kun; Zhang Feng; Yue Qunfeng^*

来源：Chemical Research in Chinese Universities, 2015, 31(1): 130-137.

DOI：10.1007/s40242-015-4224-1

• Nitrogen-doped mesoporous carbon
• Ionic liquid
• Gas adsorption

Nitrogen-doped mesoporous carbon material was prepared via a simple one-step thermolysis method via the carbonization of ionic liquid, 1-cyanomethy1-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([MCNIm](+)[Nf(2)T](-)). The nanostructure of the resultant carbon material was characterized by X-ray diffraction(XRD) and transmission electron microscopy(TEM) and the types of N-containing groups of the carbonimaterial were investigated by X-ray photoelectron spectroscopy(XPS). The N-content of the carbon material is 18.6%(mass fraction) based on the elemental analysis. The produced mesoporous carbon material was further used as the solid sorbent for H-2 and CO2. The hydrogen uptake capacity and H-2 isosteric heat of the carbon material were discussed. Furthermore, the nitrogen-containing carbon material as good sorbent shows relatively high adsorption and separation ability for CO2 from CH4, for which the heat of CO2 adsorption(Q(st)) is 31.8 kJ/mol. The mesoporous structure and nitrogen functionality make the carbon material with high adsorption capacity and selectivity for CO2 and ability to store H2, indicating that this kind of nitrogen-doped carbon material originated from ionic liquids is a promising sorbent material for high-performance separation and adsorption.

• 出版日期2015-2
• 单位哈尔滨师范大学