Assembling ionic liquids in MOF “Monomer” based membranes to trigger CO₂/CH₄ separation

Abstract

The advantage of ionic liquids (ILs) in the selective adsorption of CO2 can improve the CO2-selective separation of IL-modified membranes. Herein, a facile post-modification strategy using ILs has been developed...

Challenges and recent advances in MOF-based gas separation membranes

“…45 The dip-coating method enhanced the binding ability of MOF with IL and reduced the surface loss of IL. 46 The membranes constructed by the interfacial polymerization of MOF ''porous monomers'' filled with TMC had nanoscale gaps, and achieved a high separation performance for CO 2 /CH 4 . Moreover, the IL forms hydrogen bonds with the membrane increasing the stability of the membrane.…”

“…Cui et al proposed the preparation of composite membranes by interfacial polymerization and filled the interspaces between the MOF and tricarbonyl chloride (TMC) monomers with an IL with a high CO 2 affinity. 46 The membranes constructed by the interfacial polymerization of MOF “porous monomers” filled with TMC had nanoscale gaps, and achieved a high separation performance for CO 2 /CH 4 . Moreover, the IL forms hydrogen bonds with the membrane increasing the stability of the membrane.…”

Ionic Liquids Functionalized MOFs for Adsorption

“…Sun et al 344 fabricated IL-functionalized MOF membranes by an easy postmodification approach for CO 2 /CH 4 separation. In contrast to the nonselectivity of the pristine membrane, the functionalized MOF membranes exhibited a high CO 2 /CH 4 selectivity of 35, attributing to the added ILs with strong CO 2 affinity that filled the voids between the MOF and trimesoyl chloride monomers.…”

Metal–organic frameworks for the photocatalytic oxygen reduction reaction to hydrogen peroxide

“…74,75 Additionally, the coordination configurations between transition metals and organic linkers create the porosity of MOFs, while the uniform pores at the nanoscale can facilitate the adsorption of gas and liquid molecules such as CO 2 , O 2 , N 2 , CH 4 , C 3 H 6 , and benzene. 21,30,76–78…”

“…74,75 Additionally, the coordination configurations between transition metals and organic linkers create the porosity of MOFs, while the uniform pores at the nanoscale can facilitate the adsorption of gas and liquid molecules such as CO 2 , O 2 , N 2 , CH 4 , C 3 H 6 , and benzene. 21,30,[76][77][78] Kitagawa and co-workers introduced chemical modulators into the solvothermal reaction to adjust the nucleation and the growth process of MOF nanocrystals via the competitive coordination between chemical modulators and ligands to optimize the geometry of MOFs. 79 The high concentration of chemical modulators promote the equilibrium reaction and the formation of defects, which can result in the structural defects of a missing linker or a cluster on the basis of the original structure (Fig.…”