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Ferric ion diffusion for MOF-polymer composite with internal boundary sinks

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dc.contributor.authorLouw, K.I.
dc.contributor.authorBradshaw Hajek, B.H.
dc.contributor.authorHill, J.M.
dc.date.issued2022
dc.description.abstractSimple and economical ferric ion detection is necessary in many industries. An europium-based metal organic framework has selective sensing properties for solutions containing ferric ions and shows promise as a key component in a new sensor. We study an idealised sensor that consists of metal organic framework (MOF) crystals placed on a polymer surface. A two-dimensional diffusion model is used to predict the movement of ferric ions through the solution and polymer, and the ferric ion association to a MOF crystal at the boundary between the different media. A simplified one-dimensional model identifies the choice of appropriate values for the dimensionless parameters required to optimise the time for a MOF crystal to reach steady state. The model predicts that a large non-dimensional diffusion coefficient and an effective association with a small effective flux will reduce the time to steady-state. The effective dissociation is the most significant parameter to aid the estimation of the ferric ion concentration. This paper provides some theoretical insight for material scientists to optimise the design of a new ferric ion sensor.
dc.identifier.citationNanomaterials, 2022; 12(5, article no. 887):1-19
dc.identifier.doi10.3390/nano12050887
dc.identifier.issn2079-4991
dc.identifier.issn2079-4991
dc.identifier.urihttps://hdl.handle.net/11541.2/30626
dc.language.isoen
dc.publisherMDPIAG
dc.relation.fundingSA Government, PRIF RCP Mining Consortium “Unlocking Complex Resources through Lean Processing”
dc.relation.fundingUniversity of South Australia International Research Tuition Scholarship
dc.rightsCopyright 2022 the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)
dc.source.urihttps://doi.org/10.3390/nano12050887
dc.subjectdiffusion
dc.subjectferric ion sensor
dc.subjectMOF
dc.subjectfinite difference
dc.subjectcomposite materials
dc.titleFerric ion diffusion for MOF-polymer composite with internal boundary sinks
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12250707790001831 13250718040001831 Open Access Published Version
ror.mmsid9916619243501831

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