In:
Science Advances, American Association for the Advancement of Science (AAAS), Vol. 4, No. 10 ( 2018-10-05)
Abstract:
Metal-organic framework (MOF) membranes show great promise for propene/propane separation, yet a sharp molecular sieving has not been achieved due to their inherent linker mobility. Here, zeolitic imidazolate framework ZIF-8–type membranes with suppressed linker mobility are prepared by a fast current–driven synthesis (FCDS) strategy within 20 min, showing sharpened molecular sieving for propene/propane separation with a separation factor above 300. During membrane synthesis, the direct current promotes the metal ions and ligands to assemble into inborn-distorted and stiffer frameworks with ZIF-8_Cm (a newly discovered polymorph of ZIF-8) accounting for 60 to 70% of the membrane composition. Molecular dynamics simulations further verify that ZIF-8_Cm is superior to ZIF-8_I 4 ¯ 3 m (the common cubic phase) for propene/propane separation. FCDS holds great potential to produce high-quality, ultrathin MOF membranes on a large scale.
Type of Medium:
Online Resource
ISSN:
2375-2548
DOI:
10.1126/sciadv.aau1393
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2018
detail.hit.zdb_id:
2810933-8
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