Affiliation:
1. State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart Materials School of Chemical Engineering Dalian University of Technology 116024 Dalian China
2. School of Materials Science and Chemical Engineering Ningbo University 315211 Ningbo China
3. Dalian Key Laboratory of Membrane Materials and Membrane Processes Dalian University of Technology 116024 Dalian China
Abstract
AbstractConcurrent regulation of crystallographic orientation and thickness of zirconium metal–organic framework (Zr‐MOF) membranes is challenging but promising for their performance enhancement. In this study, we pioneered the fabrication of uniform triangular‐shaped, 40 nm thick UiO‐66 nanosheet (NS) seeds by employing an anisotropic etching strategy. Through innovating confined counter‐diffusion‐assisted epitaxial growth, highly (111)‐oriented 165 nm‐thick UiO‐66 membrane was prepared. The significant reduction in thickness and diffusion barrier in the framework endowed the membrane with unprecedented CO2permeance (2070 GPU) as well as high CO2/N2selectivity (35.4), which surpassed the performance limits of state‐of‐the‐art polycrystalline MOF membranes. In addition, highly (111)‐oriented 180 nm‐thick NH2‐UiO‐66 membrane showing superb H2/CO2separation performance with H2permeance of 1230 GPU and H2/CO2selectivity of 41.3, was prepared with the above synthetic procedure.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Cited by
2 articles.
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