Oriented Zeolitic Imidazolate Framework (ZIF) Nanocrystal Films for Molecular Separation Membranes
Type
ArticleAuthors
Wang, Shaofei
Liu, Jiangtao
Pulido Ponce de Leon, Bruno Antonio

Li, Yifan
Mahalingam, Dinesh

Nunes, Suzana Pereira

KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Science and Engineering Program
Nanostructured Polymeric Membrane Lab
Date
2020-04-02Online Publication Date
2020-04-02Print Publication Date
2020-04-24Permanent link to this record
http://hdl.handle.net/10754/662471
Metadata
Show full item recordAbstract
The direct synthesis of oriented, defect-free nanocrystal metal–organic framework (MOF) films is a challenging step toward their applications in advanced technologies, such as optics, sensing, and membrane-based separations. Here, we propose a one-step, in-situ growth approach to synthesize oriented zeolitic imidazolate framework-L (ZIF-L) membranes by using an isoporous film as the support. The high metal-binding efficiency, as well as the ordered pore structure, given by the polymeric isoporous support, promote the preferred nucleation and rapid growth of vertically aligned ZIF-L nanocrystals to construct dense membranes. Vertically aligned nanochannels between the inter-lattice of ZIF-L are therefore formed through the polycrystalline membrane. The membrane exhibited a high H2 permeance, 1635 GPU (1 GPU= 1 × 10−6 cm3 (STP)/cm2 s cmHg), and H2/C3H8 selectivity of 516, when targeting hydrogen separation from hydrocarbon in a steam reforming process. The membrane can be further used in organic solvents nanofiltrations, with a methanol permeance of 38.7 L m−2 h−1 bar−1, and >90% rejection of organic dye molecules. Furthermore, by taking advantage of the anisotropic pore structure, the ZIF-L membrane could be further hydrolyzed to produce ultrathin ZIF-L nanosheets with a thickness ~5 nm, which provides a facile platform to synthesize two-dimensional MOFs nanosheetsCitation
Wang, S., Liu, J., Pulido, B., Li, Y., Mahalingam, D., & Nunes, S. P. (2020). Oriented Zeolitic Imidazolate Framework (ZIF) Nanocrystal Films for Molecular Separation Membranes. ACS Applied Nano Materials. doi:10.1021/acsanm.0c00570Sponsors
The authors thank King Abdullah University of Science and Technology for the financial support, in particular the CRG6 grant URF/1/3441-01-01. We also thank Professor Zachary P. Smith from Massachusetts Institute of Technology (MIT) for helpful discussion.Publisher
American Chemical Society (ACS)Journal
ACS Applied Nano MaterialsAdditional Links
https://pubs.acs.org/doi/10.1021/acsanm.0c00570ae974a485f413a2113503eed53cd6c53
10.1021/acsanm.0c00570