Development of advanced materials with high CO_(2)capture capacity and,inter alia,superior regenerability with low energy consumption(low-temperature CO_(2)release)remains highly desired yet challenging.Herein,we firs...Development of advanced materials with high CO_(2)capture capacity and,inter alia,superior regenerability with low energy consumption(low-temperature CO_(2)release)remains highly desired yet challenging.Herein,we firstly report the precipitation-involved CO_(2)capture from ultradilute sources(e.g.,exhaled gas and indoor air)and the reversible room-temperature CO_(2)release accelerated by mechanical power using a covalent organic superphane cage.This superphane-based operating system enables CO_(2)in ultradilute gas(<6%)to be concentrated up to 83%.As inferred from the control experiments and theoretical calculations,this proof-of-concept CO_(2)capture and concentration system with mechanical power-triggered CO_(2)release by the discrete organic cage could be rationalized by the formation of a sixmembered ring transition state with relatively low energy barrier during the process of the adsorption and desorption of CO_(2)on the cage surface,along with the precipitation-involved phase change.展开更多
基金funded by the National Natural Science Foundation of China(grant no.22071050 to Q.H.)Fundamental Research Funds for the Central Universities(Startup Funds to Q.H.).
文摘Development of advanced materials with high CO_(2)capture capacity and,inter alia,superior regenerability with low energy consumption(low-temperature CO_(2)release)remains highly desired yet challenging.Herein,we firstly report the precipitation-involved CO_(2)capture from ultradilute sources(e.g.,exhaled gas and indoor air)and the reversible room-temperature CO_(2)release accelerated by mechanical power using a covalent organic superphane cage.This superphane-based operating system enables CO_(2)in ultradilute gas(<6%)to be concentrated up to 83%.As inferred from the control experiments and theoretical calculations,this proof-of-concept CO_(2)capture and concentration system with mechanical power-triggered CO_(2)release by the discrete organic cage could be rationalized by the formation of a sixmembered ring transition state with relatively low energy barrier during the process of the adsorption and desorption of CO_(2)on the cage surface,along with the precipitation-involved phase change.
