Simultaneous neutron powder diffraction and microwave dielectric studies of ammonia absorption in metal-organic framework systems

Barter, M., Hartley, J., Yazigi, F.-J., Marshall, R. J., Forgan, R. S. , Porch, A. and Jones, M. O. (2018) Simultaneous neutron powder diffraction and microwave dielectric studies of ammonia absorption in metal-organic framework systems. Physical Chemistry Chemical Physics, 20(15), pp. 10460-10469. (doi:10.1039/C8CP00259B) (PMID:29617020)

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Abstract

Ammonia absorption has been investigated in metal-organic frameworks (UiO-67, HKUST-1 and CPO-27-Co) using custom-built apparatus that allows simultaneous neutron powder diffraction (NPD), microwave dielectric characterisation and out-gas mass spectroscopy of solid-state materials during ammonia adsorption. Deuterated ammonia was flowed through the sample and absorption monitored using mass flow meters and mass spectroscopy. Argon gas was then flowed through the ammoniated sample to cause ammonia desorption. Changes in structure found from NPD measurements were compared to changes in dielectric characteristics to differentiate physisorbed and metal-coordinated ammonia, as well as determine decomposition of sample materials. The results of these studies allow the identification of materials with useful ammonia storage properties and provides a new metric for the measurement of gas absorption within mesoporous solids.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Forgan, Dr Ross and Yazigi, Francois-joseph and Marshall, Mr Ross James
Authors: Barter, M., Hartley, J., Yazigi, F.-J., Marshall, R. J., Forgan, R. S., Porch, A., and Jones, M. O.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Physical Chemistry Chemical Physics
Publisher:Royal Society of Chemistry
ISSN:1463-9076
ISSN (Online):1463-9084
Published Online:04 April 2018
Copyright Holders:Copyright © 2018 Owner Societies
First Published:First published in Physical Chemistry Chemical Physics 20(15): 10460-10469
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.17035/d.2018.0046822874

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