Hierarchical Metal-Organic Framework Films with Controllable Meso/Macroporosity

Renheng Bo; Mahdiar Taheri; Borui Liu; Raffaele Ricco; Hongjun Chen; Heinz Amenitsch; Zelio Fusco; Takuya Tsuzuki; Guihua Yu; Rob Ameloot; Paolo Falcaro; Antonio Tricoli

doi:10.1002/advs.202002368

Hierarchical Metal-Organic Framework Films with Controllable Meso/Macroporosity

Adv Sci (Weinh). 2020 Nov 13;7(24):2002368. doi: 10.1002/advs.202002368. eCollection 2020 Dec.

Authors

Affiliations

¹ Nanotechnology Research Laboratory Research School of Electrical, Energy, and Materials Engineering Australian National University Canberra 2601 Australia.
² Laboratory of Advanced Nanomaterials for Sustainability Research School of Electrical, Energy, and Materials Engineering Australian National University Canberra 2601 Australia.
³ Institute of Physical and Theoretical Chemistry Graz University of Technology Stremayrgasse 9/Z2 Graz 2010 Austria.
⁴ Institute of Inorganic Chemistry Graz University of Technology Stremayrgasse 9/Z2 Graz 2010 Austria.
⁵ Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin Austin Texas 78712 USA.
⁶ Centre for Membrane Separations Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions Leuven 3001 Belgium.

Abstract

The structuring of the metal-organic framework material ZIF-8 as films and membranes through the vapor-phase conversion of ZnO fractal nanoparticle networks is reported. The extrinsic porosity of the resulting materials can be tuned from 4% to 66%, and the film thickness can be controlled from 80 nm to 0.23 mm, for areas >100 cm². Freestanding and pure metal-organic frameworks (MOF) membranes prepared this way are showcased as separators that minimize capacity fading in model Li-S batteries.

Keywords: 3D structuring; extrinsic porosity; metal‐organic frameworks; molecular sieving.