MOF–aminoclay composites for superior CO₂capture, separation and enhanced catalytic activity in chemical fixation of CO₂

Abstract

We delineate the growth and stabilization of ultra-small (2-3 nm) {Cu(BTC)(HO)·xHO} MOF nanoparticles on a 2D layered aminoclay template. The composite shows significant CO uptake (5.35 mmol g at 298 K, 1 bar; 46% higher than pristine bulk MOF), superior CO separation efficiency from CO/N and CO/CH mixtures and higher catalytic proficiency for chemical fixation of CO into cyclic carbonates.

Efficient Solvent‐Free Carbon Dioxide Fixation Reactions with Epoxides Under Mild Conditions by Mixed‐Ligand Zinc(II) Metal–Organic Frameworks

“…The capability of ZnMOF‐1 /TBAB to catalyze the CO 2 ‐PO reaction was compared with that of MOF/TBAB heterogeneous catalysts reported previously under mild reaction conditions (i.e., 1 atm and RT/40 °C) that are relevant to the present investigation, and the details are summarized in Table . Efficient MOF‐based catalysts that can achieve CO 2 cycloaddition conversion under similar mild conditions are scarce in the literature . For example, Ma et al.…”

Strategies to Enhance Carbon Dioxide Capture in Metal‐Organic Frameworks

“…An aminopropyl functionalized magnesium phyllosilicate (aminoclay: AC) [H 2 N(CH 2 ) 3 ] 8 Si 8 Mg 6 O 16 (OH) 4 has been used to stabilize in-situ prepared HKUST-1 MOF nanoparticles. [83] The HKUST-1-nanoparticles@AC composite showed a CO 2 adsorption capacity at 1 bar that was 39 % higher than that of the bulk HKUST-1 MOF, indeed the Q st for the bulk MOF and the composite are 24 and 38 kJ mol À 1 , respectively. Although the AC does not adsorb any relevant amount of CO 2 , the stronger CO 2 affinity of HKUST-1-nanoparticles @AC can be ascribed to the active sites formed at the MOF NPs-AC interface, which enable the interaction between the substrate and the quadrupolar CO 2 , reaching a total capacity comparable to the benchmark MOF-74.…”

“…Recent advancement on MOF composites research has demonstrated that a rational combination of two components within a composite promotes positive synergistic effects and simultaneously moderates the drawbacks of the single materials. [78] Several examples of MOF composites with graphene, [79] graphene oxide, [80] MCM-41, [81] ionic liquids, [82] clays [83] and polymers [84] have been developed and successfully applied to CO 2 adsorption, aiming to synthesize a material for CO 2 capture.…”

“…Several examples of MOF composites with graphene, graphene oxide, MCM‐41, ionic liquids, clays and polymers have been developed and successfully applied to CO 2 adsorption, aiming to synthesize a material for CO 2 capture.…”

“…The in‐situ synthesis of MOF using a solid matrix as template has been proved to be an effective technique for the synthesis of composites. An aminopropyl functionalized magnesium phyllosilicate (aminoclay: AC) [H 2 N(CH 2 ) 3 ] 8 Si 8 Mg 6 O 16 (OH) 4 has been used to stabilize in‐situ prepared HKUST‐1 MOF nanoparticles . The HKUST‐1‐nanoparticles@AC composite showed a CO 2 adsorption capacity at 1 bar that was 39 % higher than that of the bulk HKUST‐1 MOF, indeed the Q st for the bulk MOF and the composite are 24 and 38 kJ mol −1 , respectively.…”