Highly stable Li<sup>+</sup> selective electrode with metal-organic framework as ion-to-electron transducer

Abdollahzadeh, M; Bayatsarmadi, B; Vepsäläinen, M; Razmjou, A; Asadnia, M

Highly stable Li<sup>+</sup> selective electrode with metal-organic framework as ion-to-electron transducer

Abdollahzadeh, M Bayatsarmadi, B Vepsäläinen, M Razmjou, A Asadnia, M

Permalink

Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Sensors and Actuators B: Chemical, 2022, 350, pp. 130799-130799
Issue Date:: 2022-01-01

Closed Access

	Filename	Description	Size
	1-s2.0-S0925400521013678-main.pdf	Published version	4.57 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Abdollahzadeh, M
dc.contributor.author	Bayatsarmadi, B
dc.contributor.author	Vepsäläinen, M
dc.contributor.author	Razmjou, A
dc.contributor.author	Asadnia, M
dc.date.accessioned	2021-10-20T04:08:20Z
dc.date.available	2021-10-20T04:08:20Z
dc.date.issued	2022-01-01
dc.identifier.citation	Sensors and Actuators B: Chemical, 2022, 350, pp. 130799-130799
dc.identifier.issn	0925-4005
dc.identifier.uri	http://hdl.handle.net/10453/151156
dc.description.abstract	Detection of Li+ ions is vital due to their applications as therapeutic drugs in medicine. In addition, finding Li+ in geothermal brines is gaining interest because of its application in energy storage systems. Monitoring Li+ levels in an aqueous environment can be achieved using chemical sensors. Solid-contact sensors (SCS) have attracted significant attention because of their portability, high sensitivity and lack of requirement of calibration. However, most solid-contact sensors suffer from low stability, especially in the long term. As a result, ion-to-electron transducers have been utilized to mitigate this problem. Recently Metal-Organic Frameworks (MOFs) have proven to be excellent candidates for use as ion-to-electron transducers in SCSs. In this study, we have used Ni-HAB MOF to produce a highly stable Li+ selective electrode. Increasing the thickness of the MOF to 3.28 µm enhanced the sensor's capacitance 100-fold leading to the lowest drift in Li+ SCSs reported in the literature, 1.15×10−6 mV/h with a low limit of detection (LOD) of 9.94×10−7M and a 57.6 mV/dec sensitivity. The sensor exhibited a linear output and a fast response time of less than 1 s. In addition, the sensor developed was used in a real brine to detect the concentration of Li+ ions, where the obtained results were in good agreement with the actual concentration of Li+ ions. This paper offers a solution for the persistent issues of solid-contact sensors such as drift, response time, and limit of detection and paves the way for the miniaturization of sensors to be used in real-life applications.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Sensors and Actuators B: Chemical
dc.relation.isbasedon	10.1016/j.snb.2021.130799
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0205 Optical Physics, 0301 Analytical Chemistry, 0912 Materials Engineering
dc.subject.classification	Analytical Chemistry
dc.title	Highly stable Li<sup>+</sup> selective electrode with metal-organic framework as ion-to-electron transducer
dc.type	Journal Article
utslib.citation.volume	350
utslib.for	0205 Optical Physics
utslib.for	0301 Analytical Chemistry
utslib.for	0912 Materials Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2021-10-20T04:08:18Z
pubs.publication-status	Accepted
pubs.volume	350

Abstract:

Detection of Li+ ions is vital due to their applications as therapeutic drugs in medicine. In addition, finding Li+ in geothermal brines is gaining interest because of its application in energy storage systems. Monitoring Li+ levels in an aqueous environment can be achieved using chemical sensors. Solid-contact sensors (SCS) have attracted significant attention because of their portability, high sensitivity and lack of requirement of calibration. However, most solid-contact sensors suffer from low stability, especially in the long term. As a result, ion-to-electron transducers have been utilized to mitigate this problem. Recently Metal-Organic Frameworks (MOFs) have proven to be excellent candidates for use as ion-to-electron transducers in SCSs. In this study, we have used Ni-HAB MOF to produce a highly stable Li+ selective electrode. Increasing the thickness of the MOF to 3.28 µm enhanced the sensor's capacitance 100-fold leading to the lowest drift in Li+ SCSs reported in the literature, 1.15×10−6 mV/h with a low limit of detection (LOD) of 9.94×10−7M and a 57.6 mV/dec sensitivity. The sensor exhibited a linear output and a fast response time of less than 1 s. In addition, the sensor developed was used in a real brine to detect the concentration of Li+ ions, where the obtained results were in good agreement with the actual concentration of Li+ ions. This paper offers a solution for the persistent issues of solid-contact sensors such as drift, response time, and limit of detection and paves the way for the miniaturization of sensors to be used in real-life applications.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/151156