Issue 38, 2024

MIL-101(Cr)/aminoclay nanocomposites for conversion of CO2 into cyclic carbonates

Abstract

We present the use of an amine functionalized two-dimensional clay i.e., aminoclay (AC), in the chemistry of a three-dimensional metal–organic framework (MOF) i.e., MIL-101(Cr), to prepare MIL-101(Cr)/AC composites, which are exploited as catalysts for efficient conversion of CO2 gas into cyclic carbonates under ambient reaction conditions. Three different MOF nanocomposites, denoted as MIL-101(Cr)/AC-1, MIL-101(Cr)/AC-2, and MIL-101(Cr)/AC-3, were synthesized by an in situ process by adding different amounts of AC to the precursor solutions of the MIL-101(Cr). The composites were characterized by various techniques such as FT-IR, PXRD, FESEM, EDX, TGA, N2 adsorption, as well as CO2 and NH3-TPD measurements. The composites were exploited as heterogeneous catalysts for CO2 cycloaddition reactions with different epoxides and the catalytic activity was investigated at atmospheric pressure under solvent-free conditions. Among all the materials, MIL-101(Cr)/AC-2 shows the best catalytic efficiency under the optimized conditions and exhibits enhanced efficacy compared to various MIL-101(Cr)-based MOF catalysts, which typically need either high temperature and pressure or a longer reaction time or a combination of all the parameters. The present protocol using MIL-101(Cr)/AC-2 as the heterogeneous catalyst gives 99.9% conversion for all the substrates into the products at atmospheric pressure.

Graphical abstract: MIL-101(Cr)/aminoclay nanocomposites for conversion of CO2 into cyclic carbonates

Supplementary files

Article information

Article type
Paper
Submitted
22 Mar 2024
Accepted
13 May 2024
First published
14 May 2024

Dalton Trans., 2024,53, 15815-15825

MIL-101(Cr)/aminoclay nanocomposites for conversion of CO2 into cyclic carbonates

Jyoti, S. Kumari, S. Chakraborty, P. Kanoo, V. Kumar and A. Chakraborty, Dalton Trans., 2024, 53, 15815 DOI: 10.1039/D4DT00849A

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