Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, PR China.
College of Engineering, Zhejiang Normal University, 688 Yingbin Ave. Jinhua 321004, PR China.
J Environ Sci (China). 2020 Jul;93:109-116. doi: 10.1016/j.jes.2020.04.006. Epub 2020 Apr 16.
In this study, N-doped porous carbons were produced with commercial phenolic resin as the raw material, urea as the nitrogen source and KOH as the activation agent. Different from conventional carbonization-nitriding-activation three-step method, a facile two-step process was explored to produce N-incorporated porous carbons. The as-obtained adsorbents hold superior CO uptake, i.e. 5.01 and 7.47 mmol/g at 25 °C and 0 °C under 1 bar, respectively. The synergistic effects of N species on the surface and narrow micropores of the adsorbents decide their CO uptake under 25 °C and atmospheric pressure. These phenolic resin-derived adsorbents also possess many extremely promising CO adsorption features like good recyclability, quick adsorption kinetics, modest heat of adsorption, great selectivity of CO over N and outstanding dynamic adsorption capacity. Cheap precursor, easy preparation strategy and excellent CO adsorption properties make these phenolic resin-derived N-doped carbonaceous adsorbents highly promising in CO capture.
在这项研究中，以商业酚醛树脂为原料，尿素为氮源，KOH 为活化剂，制备了 N 掺杂多孔碳。与传统的碳化-氮化-活化三步法不同，我们探索了一种简便的两步法来制备 N 掺杂多孔碳。所得到的吸附剂具有优异的 CO 吸附能力，即在 25°C 和 0°C 下，1 巴时的 CO 吸附量分别为 5.01mmol/g 和 7.47mmol/g。N 物种在吸附剂表面和窄微孔中的协同作用决定了它们在 25°C 和大气压下的 CO 吸附能力。这些酚醛树脂衍生的吸附剂还具有许多非常有前途的 CO 吸附特性，如良好的可回收性、快速的吸附动力学、适中的吸附热、对 CO 具有高选择性以及出色的动态吸附容量。廉价的前驱体、简单的制备策略以及优异的 CO 吸附性能，使得这些酚醛树脂衍生的 N 掺杂碳质吸附剂在 CO 捕集方面具有很高的应用前景。
