Abstract This work provides a simple and cost-effective way to synthesize carbonaceous sorbents with superior CO2 capture performance under ambient conditions. Using a carbonized commercial phenolic resin as carbon precursor and NaNH2 as both activation agent and nitridation reagent, nitrogen-doped porous carbons were synthesized by a single-step reaction at 400-500 °C. The resulting carbons were highly microporous with large amounts of nitrogen content and CO2 uptake capacities up to 4.64 and 7.13 mmol/g, at atmospheric pressure and, respectively, 25 °C and 0 °C. A systematic study showed that the synergetic effect of narrow microporosity and nitrogen content determines the sorbents' CO2 capture capability. In addition, these phenolic-resin-derived porous carbons demonstrate excellent recyclability, stability, and dynamic CO2 capture capacity, as well as reasonable heat of adsorption and CO2/N2 selectivity. The multiple merits of these cost-effective phenolic-resin-based carbons combined with a single-step and low-temperature preparation procedure reveal that they are excellent candidates for CO2 capture.

中文翻译：

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低温氨化钠活化合成的氮掺杂多孔碳高效吸附CO 2

摘要 这项工作提供了一种简单且经济高效的方法来合成在环境条件下具有优异 CO2 捕获性能的碳质吸附剂。使用碳化的商业酚醛树脂作为碳前体，NaNH2 作为活化剂和氮化试剂，在 400-500 °C 下通过一步反应合成了掺氮多孔碳。所得碳具有高度微孔性，在大气压和 25°C 和 0°C 下，具有大量的氮含量和高达 4.64 和 7.13 mmol/g 的 CO2 吸收能力。一项系统研究表明，窄微孔率和氮含量的协同效应决定了吸附剂的 CO2 捕获能力。此外，这些酚醛树脂衍生的多孔碳表现出优异的可回收性、稳定性和动态 CO2 捕获能力，以及合理的吸附热和 CO2/N2 选择性。这些具有成本效益的酚醛树脂基碳的多重优点与单步和低温制备程序相结合，表明它们是捕获 CO2 的绝佳候选者。