Products Cited in Publications Worldwide Scalable synthesis of mixed-linker (Zn) ZIFs and their application in CO2 adsorption and fixation

Scalable synthesis of mixed-linker (Zn) ZIFs and their application in CO2 adsorption and fixation

Abraha, Yuel W.; Tsai, Chih-Wei; Langner, Ernst H. G.

DOI:

Abstract

Several ZIFs and their functionalised derivatives have been reported as efficient catalytic materials for the fixation of CO2 in the bid to reduce global warming, caused by the persistent use of fossil fuels. However, the major challenge of using these ZIFs at large scales requires the scalability of their synthesis. Herein, a series of Zn-based zeolite imidazolate frameworks (ML-ZIFs) with mixed linkers (2-methylimidazole and 2-nitroimidazole) were synthesized via an easily scalable procedure. The products were characterised by PXRD, TGA, TEM, N2 isotherms, digestive 1H NMR and evaluated as catalysts for CO2 fixation. All ML-ZIFs are thermally stable, highly porous with SOD or frl topologies and particle sizes of 44-360 nm. ML-ZIF 3 with [Zn(mIm)0.87(nIm)1.13] composition resulted in the highest CO2 uptake of 91 cm3g-1. ML-ZIF 4 (Zn(mIm)1.44(nIm)0.56) led to the highest catalytic activity (684 h-1) by a ZIF derivative in the cycloaddition of CO2 to epichlorohydrin substrate.

Keywords

Scalable ; ZIFs ; Catalysts ; CO2 fixation

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