Cathodic Deposition-Assisted Synthesis of Thin Glass MOF Films for High-Performance Gas Separations.
Angew Chem Int Ed Engl
; 63(27): e202401817, 2024 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-38652758
ABSTRACT
Glass metal-organic framework (MOF) films can be fabricated from their crystalline counterparts through a melt-quenching process and are prospective candidates for gas separation because of the elimination of the grain boundaries in crystalline MOF films. However, current techniques are limited to producing glass MOF films with a thickness of tens of micrometers, which leads to ultralow gas permeances. Here, we report a novel cathodic deposition-assisted synthesis of glass ZIF-62 films with a thickness as low as ~1â
µm. Electrochemical analyses and deposition experiments suggest that the cathodic deposition can lead to pure crystalline ZIF-62 films with a controllable thickness of ~2â
µm to ~15â
µm. Accordingly, glass ZIF-62 films with a thickness of ~1â
µm to ~10â
µm can be obtained after a thermal treatment. The fabricated defect-free glass ZIF-62 film measuring 2â
µm in thickness shows a remarkable CO2/N2 and CO2/CH4 selectivity of 31.4 and 33.4, respectively, with a CO2 permeance which is over 30 times higher than the best-performing glass ZIF-62 films in literature.
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MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article