title: Enhanced uptake and selectivity of CO(2) adsorption in a hydrostable metal-organic frameworks via incorporating methylol and methyl groups.
abstract: 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.
authors.affiliation: Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao 266101, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wang
authors.forename: Liangjun
authors.initials: L
authors.lastname: Li
authors.forename: Sifu
authors.initials: S
authors.lastname: Tang
authors.forename: Xuebo
authors.initials: X
authors.lastname: Zhao
keywords: CO2 uptake; functionalization; metal−organic frameworks (MOFs); selectivity