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Hematite nanoparticles-modified electrode based electrochemical sensing platform for dopamine


Citation

Kamali, Khosro Zangeneh and Alagarsamy, Pandikumar and Huang, Nay Ming and Ong, Boon Hoong and Lim, Hong Ngee (2014) Hematite nanoparticles-modified electrode based electrochemical sensing platform for dopamine. The Scientific World Journal, 2014. art. no. 396135. pp. 1-13. ISSN 2356-6140; ESSN: 1537-744X

Abstract

Hematite (α-Fe2O3) nanoparticles were synthesized by the solid transformation of ferrous hydroxide and ferrihydrite in hydrothermal condition. The as-prepared α-Fe2O3 nanoparticles were characterized by UV-vis, PL, XRD, Raman, TEM, AFM, FESEM, and EDX analysis. The experimental results indicated the formation of uniform hematite nanoparticles with an average size of 45 nm and perfect crystallinity. The electrochemical behavior of a GC/α-Fe2O3 electrode was studied using CV and EIS techniques with an electrochemical probe, [Fe(CN)6]3−/4− redox couple. The electrocatalytic activity was investigated toward DA oxidation in a phosphate buffer solution (pH 6.8) by varying different experimental parameters. The chronoamperometric study showed a linear response in the range of 0–2 μM with LoD of 1.6 μM for DA. Square wave voltammetry showed a linear response in the range of 0–35 μM with LoD of 236 nM for DA.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1155/2014/396135
Publisher: Hindawi Publishing Corporation
Keywords: Hematite (α-Fe2O3) nanoparticles; Electrochemical; Dopamine
Depositing User: Nabilah Mustapa
Date Deposited: 21 Apr 2016 09:37
Last Modified: 21 Apr 2016 09:37
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1155/2014/396135
URI: http://psasir.upm.edu.my/id/eprint/37846
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