Highly porous nitrogen-doped polyimine-based carbons with adjustable microstructures for CO2 capture
Highly porous nitrogen-doped polyimine-based carbons with adjustable microstructures for CO2 capture
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DOI：
10.1039/c3ta11995e
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Kaskel, Stefan
中科院分区：
文献类型：
--
作者：
Wang, Jiacheng;Senkovska, Irena;Kaskel, Stefan
以一种新型的多孔聚亚胺为前驱体，成功地制备了一系列高孔隙度的氮掺杂多孔碳材料。所得的NPC具有高达3195 m2/g的高比表面积、高孔体积和微孔体积（分别高达1.58和1.38 cm 3/g）、窄的微孔尺寸分布和取决于活化温度（600-750 ℃）可调节的氮（1.52-5.05重量%）。在较高温度（700-750摄氏度）下制备的NPC的CO2吸收量低于在较温和条件（600-650摄氏度）下制备的NPC。在1巴下，NPC-650表现出最佳的CO2捕获性能，并且可以在25和0 ℃下分别有效地吸附3.10 mmol g（-1）（136 mg g（-1））和5.26 mmol g（-1）（231.3 mg g（-1））的CO2分子。NPC还显示出良好的初始CO2/N-2吸附选择性高达23.4，并且在1巴下的CO2/N-2吸附比为6.6。同时，这些NPC表现出高稳定性和容易的再生/再循环性，而没有明显的CO2捕获能力的损失。
A series of highly porous nitrogen doped porous carbons (NPCs) have been successfully prepared using a novel porous polyimine as the precursor. The resulting NPCs have a high specific surface area of up to 3195 m(2) g(-1), high pore volume and micropore volume (up to 1.58 and 1.38 cm(3) g(-1), respectively), narrow micropore size distributions, and adjustable nitrogen (1.52-5.05 wt%) depending on the activation temperatures (600-750 degrees C). The CO2 uptakes of the NPCs prepared at higher temperatures (700-750 degrees C) are lower than those prepared at milder conditions (600-650 degrees C). At 1 bar, NPC-650 demonstrates the best CO2 capture performance and could efficiently adsorb CO2 molecules of 3.10 mmol g(-1) (136 mg g(-1)) and 5.26 mmol g(-1) (231.3 mg g(-1)), at 25 and 0 degrees C, respectively. The NPCs also show good a initial CO2/N-2 adsorption selectivity of up to 23.4 and an adsorption ratio of CO2/N-2 (6.6) at 1 bar. Meanwhile, these NPCs exhibit a high stability and facile regeneration/recyclability without evident loss of the CO2 capture capacities.