期刊
CATALYSIS TODAY
卷 339, 期 -, 页码 337-343出版社
ELSEVIER
DOI: 10.1016/j.cattod.2019.01.050
关键词
CO2; Cycloaddition; Cyclic carbonates; Mixed ligands; Zeolitic imidazolate framework
资金
- National Natural Science Foundation of China [21536008, 21621004]
- National Key Research and Development Program of China [2016YFB0600902]
An efficient dual-ligand zeolitic imidazolate framework ZIF-8-90 was fabricated for the synthesis of five-membered cyclic carbonate from CO2 and epichlorohydrin (ECH) in the absence of co-catalysts and solvents. The effects of various reaction parameters were studied. The dual-ligand ZIF-8-90 showed very high selectivity (up to 99%). ZIF-8-90 exhibited better catalytic ability with lower cost than ZIF-90 and enhanced framework stability with significantly improved selectivity compared to ZIF-8. Moreover, the catalyst has been successfully reused for three cycles with negligible decrease in the catalytic activity. A plausible mechanism for the ZIF-8-90 catalyzed ECH - CO2 cycloaddition under solvent-free and co-catalyst-free has been proposed.
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