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)

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: Yazigi, Francois-joseph and Forgan, Professor Ross 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