Affiliation:
1. State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P.R. China
2. University of Chinese Academy of Sciences Beijing 100049 P.R. China
Abstract
AbstractExcessive CO2 in the air can not only lead to serious climate problems but also cause serious damage to humans in confined spaces. Here, a novel metal–organic framework (FJI‐H38) with adaptive ultramicropores and multiple active sites is prepared. It can sieve CO2 from air with the very high adsorption capacity/selectivity but the lowest adsorption enthalpy among the reported physical adsorbents. Such excellent adsorption performances can be retained even at high humidity. Mechanistic studies show that the polar ultramicropore is very suitable for molecular sieving of CO2 from N2, and the distinguishable adsorption sites for H2O and CO2 enable them to be co‐adsorbed. Notably, the adsorbed‐CO2‐driven pore shrinkage can further promote CO2 capture while the adsorbed‐H2O‐induced phase transitions in turn inhibit H2O adsorption. Moreover, FJI‐H38 has excellent stability and recyclability and can be synthesized on a large scale, making it a practical trace CO2 adsorbent. This will provide a new strategy for developing practical adsorbents for CO2 capture from the air.
Funder
National Key Research and Development Program of China
Natural Science Foundation of Fujian Province
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
2 articles.
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