Sprayable, Large-Area Metal–Organic Framework Films and Membranes of Varying Thickness
Hurrle, S. / Friebe, S. / Wohlgemuth, J. / Wöll, C. / Caro, J. / Heinke, L. (2017)
Chem. Eur. J., 23, 10, 2017, 2294–2298
- Datum: Februar 2017
Despite their huge potential for efficient molecular separation, the fabrication of membranes from metal–organic frameworks (MOFs) remains a major challenge. The powders obtained by the conventional solvothermal MOF syntheses are difficult to process, and as a result the fabrication of well-performing, large-area MOF-based membranes is still awaiting success.
The deposition of MOF thin films suited for membrane applications is demonstrated by employing a step-by-step spray method. This method can be scaled up to obtain industrially relevant membrane areas and a continuous process is also possible. The performance of sprayed HKUST-1-based membranes by the separation of a binary H2/CO2 mixture is also demonstrated. Furthermore, this approach enables the control of the MOF film thickness, and thus controlling the permeance and the selectivity of the membrane.