文献类型：期刊文献

英文题名：Highly Selective CO2 Uptake in Novel Fishnet-like Polybenzoxazine-Based Porous Carbon

作者：Hong, Lin[1];Ju, Shunlong[2];Liu, Xiaoyun[1];Zhuang, Qixin[1];Zhan, Guozhu[3];Yu, Xuebin[2]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China;[2]Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China;[3]806th Inst Eighth Acad CASC, Huzhou 313000, Peoples R China

年份：2019

卷号：33

期号：11

起止页码：11454

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20194307589671);WOS:【SCI-EXPANDED(收录号:WOS:000499741900104)】；

基金：This work was financially supported by the National Natural Science Foundation of China (51573045, 51625102, and 51773060), Shanghai Natural Science Foundation (16ZR1407700), Shanghai Rising-Star Program (17QB1401200), and the Fundamental Research Funds for the Central Universities (50321041917001).

语种：英文

外文关键词：Specific surface area - Binding energy - Chemical stability - Porous materials - Activated carbon - Carbonization - Hydrogen bonds - Molecules

摘要：Porous activated carbons are considered to be promising CO2 adsorbents due to their high specific surface area, high chemical stability, and tailorable surface properties. However, their low CO2 capture capacity and inferior CO2/N-2 selectivity have hindered their application. Here, we describe novel fishnet-like, polybenzoxazine-based porous carbons (PBZCs) prepared by a single-step monomer thermal curing, carbonization, and activation process. The PBZCs exhibit an ultrahigh CO2 uptake capacity of 8.44 mmol g(-1) and a superior CO2/N-2 IAST selectivity of 56 (at 273 K, 1 bar). Such excellent CO2 adsorption performance may to some extent be ascribed to a high specific surface area and a large ultramicropore volume. However, the results reveal that the CO2 capture capacity is not solely associated with porosity. It may also be attributable to the abundant hydroxyl groups of the PBZCs, which may form hydrogen bonds with CO2 molecules. The role of the oxygen functionalities of porous carbon for CO2 capture was further demonstrated through theoretical calculation combined with experimental analysis. Hydrogen bonding lowers the binding energy between the carbon framework and CO2 molecules, which greatly facilitates CO2 adsorption. Furthermore, the novel fishnet-like structure can anchor CO2 molecules effectively and selectively. These PBZC carbons are potentially promising CO2 adsorbents.