Enhanced uptake and selectivity of CO2 adsorption in a hydrostable metal-organic frameworks via incorporating methylol and methyl groups
作者：Chao Wang??, Liangjun Li§, Sifu Tang?, and Xuebo Zhao
關鍵字：CO2 adsorption
論文來源：期刊
具體來源：ACS Appl. Mater. Interfaces, 2014, 6 (19), pp 16932–16940
發表時間：2014年
A new methylol and methyl functionalized metal–organic frameworks (MOFs) QI-Cu has been designed and synthesized. As a variant of NOTT-101, this material exhibits excellent CO2 uptake capacities at ambient temperature and pressure, as well as high CH4 uptake capacities. The CO2 uptake for QI-Cu is high, up to 4.56 mmol g–1 at 1 bar and 293 K, which is top-ranked among MOFs for CO2 adsorption and significantly larger than the nonfunctionalized NOTT-101 of 3.93 mmol g–1. The enhanced isosteric heat values of CO2 and CH4 adsorption were also obtained for this linker functionalized MOFs. From the single-component adsorption isotherms, multicomponent adsorption was predicted using the ideal adsorbed solution theory (IAST). QI-Cu shows an improvement in adsorptive selectivity of CO2 over CH4 and N2 below 1 bar. The incorporation of methylol and methyl groups also greatly improves the hydrostability of the whole framework.