Nitrogen-enriched carbonaceous materials with hierarchical micro-mesopore structures for efficient CO2 capture
Nitrogen-enriched carbonaceous materials with hierarchical micro-mesopore structures for efficient CO2 capture
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DOI：
10.1016/j.cej.2012.01.083
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发表时间：
2012-03
影响因子：
15.1
通讯作者：
Hongwei Yang;Youzhu Yuan;S. Tsang
中科院分区：
文献类型：
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作者：
Hongwei Yang;Youzhu Yuan;S. Tsang
以葡萄糖为原料，以丙烯酸和非离子表面活性剂Brij 72为结构导向剂，采用水热法制备了富羧基多孔炭。然后将四亚乙基五胺分子通过酰化-酰胺化途径接枝到CPC表面，得到富氮多孔炭（NPC）。材料表征表明，CPC显示高的表面积与微孔和介孔结构。尽管通过酰化-酰胺化途径对CPC进行了表面官能化，但NPC的多孔结构得以保持。结果表明，在298 K和1bar下，NPC表现出优异的CO2捕获能力（3.2mmolg−1），CO2对N2的选择性高（>46）。此外，在不同温度下，CO2吸附具有良好的可逆性。
Carboxyl-rich porous carbons (CPCs) derived from glucose are prepared by a hydrothermal method in the presence of acrylic acid and non-ionic surfactant Brij 72 as structure-directing agents. Tetraethylenepentamine molecules are then grafted onto the surfaces of CPCs via acylation–amidation route, yielding nitrogen-enriched porous carbons (NPCs). Material characterizations reveal that the CPCs display high surface areas with micro and mesoporous structures. Despite the surface functionalization of CPCs via acylation–amidation route the porous structures of NPCs are maintained. As a result, the NPCs exhibit excellent CO2capture capacity (3.2mmolg−1) with high selectivity of CO2over N2(>46) at 298K and 1bar. In addition, good reversibility of CO2adsorption can be achieved at different temperatures.