Issue 8, 2022

Accessing accelerated molecular diffusion by nanopore alignment in a MOF thin film

Abstract

Molecular diffusion through a porous membrane can be accelerated by adjusting the nanopore windows and channels along the diffusion path, i.e., across the membrane thickness. We evaluated this process in a zeolitic imidazolate framework (ZIF-8) thin film. For the pore windows that were orthogonal to the plane of the thin film (membrane), we could realize a higher methanol vapour diffusivity (∼2×) with a lower energy of activation (∼3×), compared to a mixed-oriented ZIF-8 thin film. The variation in the diffusivities enhanced the structural isomer (1 and 2-propanol) selectivities (>7×), as indicated by vapour-phase and mass uptake studies using quartz crystal microbalance.

Graphical abstract: Accessing accelerated molecular diffusion by nanopore alignment in a MOF thin film

Supplementary files

Article information

Article type
Communication
Submitted
16 5月 2022
Accepted
01 7月 2022
First published
04 7月 2022

Mol. Syst. Des. Eng., 2022,7, 873-877

Accessing accelerated molecular diffusion by nanopore alignment in a MOF thin film

P. Malik and R. Haldar, Mol. Syst. Des. Eng., 2022, 7, 873 DOI: 10.1039/D2ME00091A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements