Amine-Grafted MIL-101(Cr) via Double-Solvent Incorporation for Synergistic Enhancement of CO2 Uptake and Selectivity
作者： Ruiqin Zhong , Xiaofeng Yu , Wei Meng , Jia Liu , Chenxu Zhi
DOI: 10.1021/ACSSUSCHEMENG.8B03597
关键词:
摘要: Recent research on the amine-grafted metal–organic frameworks has obviously spurred intriguing application prospects in field of CO2 capture; however, few them focused synthetic approach, which directly determines their structural stabilities for application. This work explores a double-solvent incorporation strategy to rapidly squeeze molecule-level amines into cavites of MIL-101(Cr) without any framework destruction MOFs. Tris(2-aminoethyl) amine (TAEA), ethylenediamine (ED) and triethylene diamine (TEDA) were employed obtain TAEA@MIL-101(Cr), ED@MIL-101(Cr) TEDA@MIL-101(Cr), respectively. Notedly, uptake TAEA@MIL-101(Cr) could be 1.5 times as high that pure at 273 K with superhigh adsorption heat. Most importantly, CO2/CO selectivity was drastically increased, 103 higher than MIL-101(Cr). The experimental theoretical simulation results indicated different mechanism CO...
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