The preparation of nitrogen-doped activated carbon (NACs) has received significant attention because of their applications in CO2 capture and sequestration (CCS) owing to abundant nitrogen atoms on their surface and controllable pore structures by carefully controlled carbonization. We report high-surface-area porous N-doped activated carbons (NAC) by using soft-template-assisted self-assembly followed by thermal decomposition and KOH activation. The activation process was carried out under different temperature conditions (600–800 °C) using polyimine as precursor. The NAC-800 was found to have a high specific surface area (1900 m2 g−1), a desirable micropore size below 1 nm and, more importantly, a large micropore volume (0.98 cm3 g−1). NAC-800 also exhibits a significant capacity of CO2 capture i.e., over 6. 25 and 4.87 mmol g−1 at 273 K and 298 K respectively at 1.13 bar, which is one of among the highest values reported for porous carbons so far. Moreover, NAC also shows an excellent separation selectivity for CO2 over N2.
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机译：氮掺杂活性炭（NAC）的制备由于在表面捕获大量氮原子和通过小心控制碳化可控制的孔结构而在CO2捕集和封存（CCS）中的应用受到了广泛关注。我们通过使用软模板辅助的自组装，然后进行热分解和KOH活化，报告了高表面积多孔N掺杂的活性炭（NAC）。活化过程是在不同温度条件下（600–800 C）以聚亚胺为前体进行的。发现NAC-800具有较高的比表面积（1900 m 2 g -1 ），理想的微孔尺寸小于1 nm，更重要的是，较大微孔体积（0.98 cm 3 g -1 ）。 NAC-800还具有显着的CO2捕集能力，即在1.13 bar时分别在273 K和298 K时分别超过6. 25和4.87 mmol g -1 。这是报道的最高值之一到目前为止，对于多孔碳。此外，NAC对N2的CO2分离选择性也极好。
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