Publication detail

Electrochemical characterisation of nanoparticulate zirconium dioxide-on-gold electrode for electrochemical detection in flow-based analytical systems

ISLAM, M. ATIA, M. MACKA, M. PAULL, B. MAHBUB, P.

Original Title

Electrochemical characterisation of nanoparticulate zirconium dioxide-on-gold electrode for electrochemical detection in flow-based analytical systems

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

Electrochemical detection; Flow-based analytical systems; Nanomaterials; Zirconium dioxide

Authors

ISLAM, M.; ATIA, M.; MACKA, M.; PAULL, B.; MAHBUB, P.

Released

20. 9. 2019

ISBN

0013-4686

Periodical

Electrochimica Acta

Year of study

318

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

61

Pages to

68

Pages count

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"
}