Products Cited in Publications Worldwide Designing 2D Ti3C2Tx MXene@ mixed-linker ZIF-9 composite for catalytic CO₂-epoxide cycloaddition

Designing 2D Ti3C2Tx MXene@ mixed-linker ZIF-9 composite for catalytic CO₂-epoxide cycloaddition

Abraha, Yuel W; Langner, Ernst HG; Motaung, David E

DOI:

Abstract

The synergistic integration of porous three-dimensional Zeolitic Imidazolate Framework (ZIF) and surface-rich two-dimensional MXene materials presents a novel approach to developing hybrid catalysts with enhanced properties. This study presents a composite material comprising Mixed Linker-ZIF 9, constructed with a cobalt metal centre and a combination of 2-nitroimidazole and 2-methylimidazole linkers in conjunction with Ti3C2Tx MXene. A series of Ti3C2Tx @ ML-ZIF 9 composites with varying ratios was synthesied and evaluated for their catalytic performance for Carbon Capture and Utilization (CCU) through CO2-epoxide cycloaddition reactions. ML-ZIF 9 exhibited an impressive CO2 uptake of 99 cm3g−1 and demonstrated thermal stability up to 238 °C. Incorporating 5–15 wt% Ti3C2Tx increased the composite's thermal stability up to 269 °C. The optimized M9-T10 composite, incorporating ∼10 wt% MXene, enhanced the catalytic activity of ML-ZIF-9 by 15 % for the CO2-propylene oxide cycloaddition reaction, achieving a Turnover Frequency (TOF) of 839 h−1 and demonstrating excellent reusability over five cycles with no significant loss in activity.

Keywords

MXene ; MOF ; Ti3C2Tx ; ZIF ; Carbon capture and utilization ; Cycloaddition reaction ; Composite materials

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