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Insights into surface interactions between metal organic frameworks and gases during transient adsorption and diffusion by in-situ small angle x-ray scattering

Dumée, Ludovic F., He, Li, Hodgson, Peter and Kong, Lingxue 2016, Insights into surface interactions between metal organic frameworks and gases during transient adsorption and diffusion by in-situ small angle x-ray scattering, Membranes, vol. 6, no. 3, pp. 1-10, doi: 10.3390/membranes6030041.

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Title Insights into surface interactions between metal organic frameworks and gases during transient adsorption and diffusion by in-situ small angle x-ray scattering
Author(s) Dumée, Ludovic F.ORCID iD for Dumée, Ludovic F. orcid.org/0000-0002-0264-4024
He, Li
Hodgson, Peter
Kong, LingxueORCID iD for Kong, Lingxue orcid.org/0000-0001-6219-3897
Journal name Membranes
Volume number 6
Issue number 3
Article ID 41
Start page 1
End page 10
Total pages 10
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2016-09-03
Keyword(s) carbon nanotube bucky-papers
gas adsorption and permeation
in-situ SAXS
lattice flexibility
metal organic frameworks membranes
molecular sieving
Summary The fabrication of molecular gas sieving materials with specific affinities for a single gas species and able to store large quantities of materials at a low or atmospheric pressure is desperately required to reduce the adverse effects of coal and oil usage in carbon capture. Fundamental understanding of the dynamic adsorption of gas, the diffusion mechanisms across thin film membranes, and the impact of interfaces play a vital role in developing these materials. In this work, single gas permeation tests across micro-porous membrane materials, based on metal organic framework crystals grown on the surface of carbon nanotubes (ZiF-8@CNT), were performed for the first time in-situ at the Australian Synchrotron on the small angle X-ray scattering beamline in order to reveal molecular sieving mechanisms and gas adsorption within the material. The results show that specific chemi-sorption of CO₂ across the ZiF-8 crystal lattices affected the morphology and unit cell parameters, while the sieving of other noble or noble like gases across the ZiF-8@CNT membranes was found to largely follow Knudsen diffusion. This work demonstrates for the first time a novel and effective technique to assess molecular diffusion at the nano-scale across sub-nano-porous materials by probing molecular flexibility across crystal lattice and single cell units.
Language eng
DOI 10.3390/membranes6030041
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086276

Document type: Journal Article
Collections: Institute for Frontier Materials
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.