MIL-101(Cr) for CO2 Conversion into Cyclic Carbonates, Under Solvent and Co-Catalyst Free Mild Reaction Conditions

Abstract

Mild reaction conditions (nearly room temperature and atmospheric CO2 pressure) for the cycloaddition of CO2 with epoxides to produce cyclic carbonates were investigated applying MIL-101(Cr) as a catalyst. The MIL-101 catalyst contains strong acid sites, which promote the ring-opening of the epoxide substrate. Moreover, the high surface area, enabling the adsorption of more CO2 (substrate), combined with a large pore size of the catalyst is essential for the catalytic performance. Additionally, epoxide substrates bearing electron-withdrawing substituents or having a low boiling point demonstrated an excellent conversion towards the cyclic carbonates. MIL-101(Cr) for the cycloaddition of carbon dioxide with epoxides is demonstrated to be a robust and stable catalyst able to be re-used at least five times without loss in activity.

TFN Membrane Fabricated by a Gyroid-like PE Support, a Basil Seed Mucilage–Fe(III) Interlayer, and a Polyamide Active Layer Incorporated with MIL-101(Cr)–NH2 Nanoparticles

“…According to the literature, the sharp and intense diffraction peaks emerged at 7.4 and 18°are related to the (822) lattice plane, and the peak appeared at 8.2°corresponds to the (753) lattice plane of MIL-101(Cr)−NH 2 , demonstrating the successful fabrication of the nanoparticles. 55 Furthermore, the high intensity of the diffraction peaks of MIL-101(Cr)−NH 2 proves the high crystallinity of the fabricated MIL-101(Cr)−NH 2 nanoparticles. 56 The abovementioned peaks are also obvious in the TFN pattern, demonstrating successful loading of nanoparticles into the active PA layer.…”

Metal–organic frameworks as catalysts for fructose conversion into 5‐hydroxymethylfurfural: Catalyst screening and parametric study

“…The non-functionalized MIL-101(Cr) has the highest BET surface area of 3038 m 2 /g, which fairly corresponds to the reported values of 2800 and 3000 m 2 /g. [57,58] The BET surface area of the MIL-101(Cr)-X (X = ÀNH 2 , ÀSO 3 H) all have a certain degree of decline due to the usage of the functionalized linker, which infiltrates the mesoporous cage of MIL-101 (Cr) and binds to its inner surface. For all the tested MOFs, the window diameters of pores are between 15 and 29.5 Å, and it can accommodate the 9.8 Å fructose F I G U R E 2 Catalytic reaction system to convert fructose into 5-HMF via CEM microwave.…”

Hypercrosslinked Ionic Polymers with High Ionic Content for Efficient Conversion of Carbon Dioxide into Cyclic Carbonates

“…To date, a large number of homogeneous and heterogeneous catalysts have been used for the CO 2 cycloaddition reaction, including ionic liquids (ILs) [8][9][10][11], metal complexes [12][13][14][15], metal-organic frameworks (MOFs) [16][17][18][19][20][21], and porous organic polymers (POPs) [1- 3,6,[22][23][24][25][26]. Some strategies have been reported for homogeneous catalysts that catalyze the CO 2 cycloaddition reaction, but these materials still face the issues of effective adsorption and catalyst recycling [27].…”