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Highly sensitive and disposable screen-printed ionic liquid/graphene based electrochemical sensors
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Document Title
Highly sensitive and disposable screen-printed ionic liquid/graphene based electrochemical sensors
Author
Kamsong W, Primpray V, Pasakon P, Sriprachuabwong C, Pakapongpan S, Mensing JP, Wisitsoraat A, Tuantranont A, Karuwan C
Name from Authors Collection
Scopus Author ID
8532633300
Affiliations
National Science & Technology Development Agency - Thailand
Type
Article
Source Title
ELECTROCHEMISTRY COMMUNICATIONS
ISSN
1388-2481
Year
2022
Volume
135
Open Access
gold
Publisher
ELSEVIER SCIENCE INC
DOI
10.1016/j.elecom.2022.107209
Format
Abstract
In this work, a highly sensitive and disposable screen-printed ionic liquid-graphene electrode (SPIL-GE) was developed for electrochemical sensing. The paste for screen printing was facilely prepared by mixing IL with electrolytically exfoliated graphene in poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (GP/PEDOT/ PSS) and carbon paste (CP) via ball milling. The IL-GP paste was then screen printed to form working and counter electrodes (WE & CE) followed by screen printing of Ag/AgCl reference electrode and insulator layer on a polyethylene substrate. Electrode geometries were optimized for electrochemical sensing, arriving at an optimal design with an overall electrode length of 25 mm, and CE and WE active areas of 15.70 and 12.57 mm(2), respectively. SPIL-GEs employing six ILs with imidazolium and pyridinium cations were assessed for electrochemical sensing of K3Fe(CN)(6). The pyridinium-type IL, namely 3-methyl-1-propylpyridinium bis(trifluoromethyl sulfonyl)imide (PMPlm), was found to exhibit the highest CV peak currents compared with other ILs at an optimal PMPlm content of 1.0% (w/w). Characterization with scanning electron microscopy and Fourier-transform infrared spectroscopy confirmed the presence of PMPlm, GP/PEDOT/PSS and CP in SPIL-GEs. The electrochemical performance of the optimal SPIL-GE towards the three common analytes including ferri/ ferro cyanide (Fe(CN)6)(3-/4)-redox couple, dopamine and hydroquinone were compared with the screen-printed carbon and graphene electrodes (SPCE & SPGE). From the results, the SPIL-GE demonstrated larger anodic currents with lower oxidation potentials for the three analytes than SPGE and SPCE, respectively. Therefore, the SPIL-GE could be a potential candidate for advanced electrochemical sensing applications.
Funding Sponsor
NSRF via Program Management Unit for Human Resources & Institutional Development, Research and Innovation [B05F640091]; National Research Council of Thailand (NRCT) [N41A640181]
License
CC-BY-NC-ND
Rights
Authors
Publication Source
WOS
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Highly sensitive and disposable screen-printed ionic liquid_graphene based electrochemical sensorsDownload