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ISLAM, M. ATIA, M. MACKA, M. PAULL, B. MAHBUB, P.
Originální název
Electrochemical characterisation of nanoparticulate zirconium dioxide-on-gold electrode for electrochemical detection in flow-based analytical systems
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
The modification of gold (Au) electrode using zirconium dioxide nanoparticles (ZrO2 NPs) has been investigated for enhanced electrochemical (EC) detection in flow-based analytical systems. The average size of ZrO2 NPs deposited in a facile procedure on the Au electrode surface was calculated as 22.5 +/- 7 nm. Redox behaviour of a test solute, ferrocyanide [Fe(CN)(6)](4-), on the bare- and ZrO2-Au electrodes was initially investigated using cyclic voltammetry. From the voltammograms of bare- and ZrO2-Au electrodes, the EC reversibility values and effective surface area were experimentally determined for the first-time in this study. Further, EC reversibility and 100% increase in effective electrode surface area were confirmed in ZrO2-Au electrode through investigating the detection response (current). The EC performance of the ZrO2-Au electrode was then investigated in amperometric detection of selected electroactive solutes separated by reversed-phase HPLC. The limits of detection (LODs), based upon an injection volume of 10 mu L for ascorbic acid, 2,3-dihydroxybenzoic acid and pyrocatechol were 0.09 mu M, 0.04 mu M, and 0.10 mu M, respectively (RSD 2.5%, n = 9, r(2) = 0.99 for concentration range 1-100 mu M). These LODs for the ZrO2-Au electrode were 2-times lower for 2,3-DHBA, and pyrocatechol than the lowest LODs reported in the literature for EC detection in HPLC. The ZrO2-Au electrode demonstrated satisfactory repeatability of preparation, detection reproducibility and high stability (8.5 h) during continuous-flow in FIA and 45 days during intermittent use with HPLC, at flow rate of 0.6 mL min(-1). This work has demonstrated a comprehensive EC characterisation of Au electrode with nanoparticulate ZrO2 for flow-based analytical systems.
Klíčová slova
Electrochemical detection; Flow-based analytical systems; Nanomaterials; Zirconium dioxide
Autoři
ISLAM, M.; ATIA, M.; MACKA, M.; PAULL, B.; MAHBUB, P.
Vydáno
20. 9. 2019
ISSN
0013-4686
Periodikum
Electrochimica Acta
Ročník
318
Číslo
1
Stát
Spojené království Velké Británie a Severního Irska
Strany od
61
Strany do
68
Strany počet
8
URL
https://www.sciencedirect.com/science/article/pii/S0013468619311740?via%3Dihub
BibTex
@article{BUT158408, author="Muhammed Ariful {Islam} and Mostafa A. {Atia} and Miroslav {Macka} and Brett {Paull} and Parvez {Mahbub}", title="Electrochemical characterisation of nanoparticulate zirconium dioxide-on-gold electrode for electrochemical detection in flow-based analytical systems", journal="Electrochimica Acta", year="2019", volume="318", number="1", pages="61--68", doi="10.1016/j.electacta.2019.06.031", issn="0013-4686", url="https://www.sciencedirect.com/science/article/pii/S0013468619311740?via%3Dihub" }