S, N co-doped porous carbons were synthesized from polybenzoxazine through solidification, carbonization and KOH activation using 4-cyanophenol, thiourea and formaldehyde as the monomers and a triblock copolymer (Pluronic F127) as a soft template. The samples were characterized by FT-IR, SEM, N₂ adsorption, elemental analysis and XPS. Results indicate that the activated samples had high surface areas of 1511.6-2385.1 m² g⁻¹ with a large number of micropores and abundant sulfur and nitrogen functionalities. The templated samples had apparently lower contents of sulfur, nitrogen and oxygen than the un-templated ones due to the easy escape of volatile sulfur, nitrogen and oxygen compounds during carbonization and KOH activation. CO₂ uptake had contributions from both physical and chemical adsorption and depended on the volume of narrow micropores less than 0.8 nm and the numbers of basic sulfur and nitrogen functional groups. The un-templated sample activated at 600 °C had the highest CO₂ uptakes of 6.96 and 4.55 mmol g⁻¹ under 1 bar at 0 and 25 °C, respectively, and was highly selective for CO₂/N₂ separation and had a high recyclable stability for CO₂ capture.

以4-氰基苯酚，硫脲和甲醛为单体，以三嵌段共聚物（Pluronic F127）为软模板，通过固化，碳化和KOH活化，由聚苯并恶嗪合成出S，N共掺杂的多孔碳。通过FT-IR，SEM，N ₂吸附，元素分析和XPS对样品进行表征。结果表明，活化的样品具有1511.6-2385.1m ² g ^-1的高表面积，具有大量的微孔和丰富的硫和氮官能度。模板化的样品中的硫，氮和氧含量明显低于未模板化的样品，这是因为在碳化和KOH活化过程中易挥发的硫，氮和氧化合物容易逸出。一氧化碳₂吸收来自物理和化学吸附，并且取决于小于0.8 nm的狭窄微孔的体积以及碱性硫和氮官能团的数量。在600°C下活化的非模板样品在1 bar下分别在0和25°C下具有最高的CO ₂吸收量，分别为6.96和4.55 mmol g ^-1，并且对CO ₂ / N ₂分离具有高度选择性，并且具有具有很高的可回收稳定性，可捕获CO ₂。