Nitrogen-doped microporous carbon materials (N-MCs) with uniform pore diameters have promising applications in gas absorption, however their fabrication is challenging. Herein, we report a new approach to prepare N-MCs with uniform pore size using azo-linked organic polymers (AOPs) as the N-containing precursors. The AOPs were synthesized via the reactions of 1,3,5-tris(4-nitrophenyl)benzene (TNPB) and melamine (MA), and their N contents were tuned by changing the molar ratios of MA to TNPB. Followed by calcination of the resultant precursors at 800 °C, porous N-MCs were produced, which were characterized by means of different techniques including FT-IR analysis, N₂ sorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and elemental analysis. It was demonstrated that the pore diameters of N-MCs could be tuned by changing the MA: TNPB ratio for preparing azo-polymer precursors, and N-MCs with pore size centered at 0.72 and 1.06 nm were obtained. The resultant N-MCs showed excellent CO₂ uptake capacity up to 191 mg g⁻¹ at 1 bar and 273 K, with a CO₂/N₂ selectivity of 58 at 298 K and good H₂ adsorption capacity of 14.7 mg g⁻¹ at 77 K.

具有均匀孔径的氮掺杂微孔碳材料（N-MCs）在气体吸收方面具有广阔的应用前景，但是其制造具有挑战性。在本文中，我们报告了一种新方法，该方法使用偶氮连接的有机聚合物（AOP）作为含N的前体来制备具有均匀孔径的N-MC。通过1,3,5-三（4-硝基苯基）苯（TNPB）和三聚氰胺（MA）的反应合成AOP，并通过改变MA与TNPB的摩尔比来调节其N含量。随后在800°C下煅烧所得的前体，制得了多孔N-MC，并通过包括FT-IR分析，N ₂在内的不同技术对其进行了表征。吸附，X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM）和元素分析。结果表明，可以通过改变制备偶氮聚合物前体的MA：TNPB比例来调节N-MC的孔径，从而制得孔径为0.72和1.06 nm的N-MC。所得的N-MC在1 bar和273 K下表现出优异的CO ₂吸收能力，最高可达191 mg g ^-1，在298 K下的CO ₂ / N ₂选择性为58，良好的H ₂吸附能力为14.7 mg g ^-1在77 K.