TY - JOUR

T1 - Oriented growth of large-area metal-organic framework ZIF-8 membrane for hydrogen separation

AU - Jin, Chunxin

AU - Liu, Shuai

AU - Chen, Xiaofang

AU - Li, Yanhong

AU - Caro, Jürgen

AU - Huang, Aisheng

N1 - Publisher Copyright: © 2024 Elsevier B.V.

PY - 2024/11

Y1 - 2024/11

N2 - Optimal orientation is the key factor to optimize the gas separation performance of metal-organic framework (MOF) membranes. However, it is still greatly challenging to prepare large-area oriented MOF membranes for industrial applications. Herein, we prepared compact and (100) oriented zeolitic-imidazolate framework-8 (ZIF-8) membranes with membrane area up to 500 cm2 on the graphite substrate via support-induced strategy within 2 h. With membrane thickness of only 620 nm, the (100) oriented ZIF-8 membranes exhibit high gas separation performances due to the reduction of inter-crystalline defects and permeation resistance. At 100 °C and 1 bar, the separation factors of H2/CO2, H2/CH4 and H2/C3H8 are 18.5, 58.2 and 101.6, respectively, with H2 permeance of about 160 x 10−9 mol m−2 s−1·Pa−1. The different positions of the 500 cm2 ZIF-8 membrane show complete consistency in orientation and separation performance, recommending this membrane suitable for future industrial applications. Further, also oriented ZIF-67 and MOF-303 membranes can be consistently prepared by this strategy, confirming its versatility for the preparation of large-area MOF membranes.

AB - Optimal orientation is the key factor to optimize the gas separation performance of metal-organic framework (MOF) membranes. However, it is still greatly challenging to prepare large-area oriented MOF membranes for industrial applications. Herein, we prepared compact and (100) oriented zeolitic-imidazolate framework-8 (ZIF-8) membranes with membrane area up to 500 cm2 on the graphite substrate via support-induced strategy within 2 h. With membrane thickness of only 620 nm, the (100) oriented ZIF-8 membranes exhibit high gas separation performances due to the reduction of inter-crystalline defects and permeation resistance. At 100 °C and 1 bar, the separation factors of H2/CO2, H2/CH4 and H2/C3H8 are 18.5, 58.2 and 101.6, respectively, with H2 permeance of about 160 x 10−9 mol m−2 s−1·Pa−1. The different positions of the 500 cm2 ZIF-8 membrane show complete consistency in orientation and separation performance, recommending this membrane suitable for future industrial applications. Further, also oriented ZIF-67 and MOF-303 membranes can be consistently prepared by this strategy, confirming its versatility for the preparation of large-area MOF membranes.

KW - Hydrogen separation

KW - Metal-organic frameworks membranes

KW - Oriented growth

KW - ZIF-8 membrane

UR - http://www.scopus.com/inward/record.url?scp=85201084171&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2024.123163

DO - 10.1016/j.memsci.2024.123163

M3 - Article

AN - SCOPUS:85201084171

VL - 711

JO - Journal of membrane science

JF - Journal of membrane science

SN - 0376-7388

M1 - 123163

ER -