Adsorptive behaviour of a novel Ag-4,4-bipyridine metal organic framework thin film tethered to a quartz crystal microbalance

Papageorgiou, A. and Andrieux, F. (2021) Adsorptive behaviour of a novel Ag-4,4-bipyridine metal organic framework thin film tethered to a quartz crystal microbalance. Journal of The Electrochemical Society, 168 (11). ISSN 0013-4651

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Abstract

We report on the development of a Quartz Crystal Microbalance-based sensor targeting the monitoring of the pertechnetate ion (TcO4-) in groundwater exploiting the anion-specific adsorptive behaviour of a novel Ag-4,4-bipyridine metal-organic framework (MOF) thin film. This MOF was first reported by Zhu et al. [Environ. Sci. Technol. Lett., 4, 316, (2017)] to selectively and irreversibly adsorb ReO4-, a non-radioactive chemical surrogate for TcO4−, in the form of bulk crystals. The structure of our film was characterised by XRD and SEM and its response and selectivity were evaluated by monitoring the changes in the resonant frequency of the QCM as a function of the concentration of ReO4- and other interferents. Finally, the interaction of all the analytes with the film was modelled with adsorption isotherms including Langmuir, Freundlich and Sips. We show that the behaviour of the thin film is substantially different from that of the bulk crystals.

Item Type:
Journal Article
Journal or Publication Title:
Journal of The Electrochemical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2100/2105
Subjects:
ID Code:
162914
Deposited By:
Deposited On:
06 Dec 2021 16:15
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Jan 2022 05:53