Synthesis and characterization of α-Fe2O3/polyaniline nanotube composite as electrochemical sensor for uric acid detection

Mahmoudian, Mohammad Reza and Basirun, Wan Jefrey and Sookhakian, Mehran and Woi, Pei Meng and Zalnezhad, Erfan and Hazarkhani, Hassan and Alias, Yatimah (2019) Synthesis and characterization of α-Fe2O3/polyaniline nanotube composite as electrochemical sensor for uric acid detection. Advanced Powder Technology, 30 (2). pp. 384-392. ISSN 0921-8831, DOI https://doi.org/10.1016/j.apt.2018.11.015.

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Official URL: https://doi.org/10.1016/j.apt.2018.11.015

Abstract

We report the synthesis of α-Fe2O3/polyaniline nanotube (PAn NTs) composite as an electrochemical sensor for uric acid (UA) detection. Field emission scanning electron microscopy (FESEM) indicates a hexagonal shape of the α-Fe2O3 while a nanotube morphology of the PAn. Impedance spectroscopy results confirm a significant decrease in the charge transfer resistance of the glassy carbon electrode (GCE) modified with α-Fe2O3/PAn NTs due to the presence of PAn NTs. The results show that the increase in the conductivity of α-Fe2O3 in the presence of PAnNTs could improve the catalytic performance of α-Fe2O3/PAn NTs composite, compared to the pure α-Fe2O3 nanoparticles. From differential pulse voltammetry, a linear working range for the concentration of UA between 0.01 µM and 5 µM, with a LOD of 0.038 µM (S/N = 3) was obtained. The sensitivity of the linear segment is 0.433 μA µM−1. The reliability of the modified electrode towards the detection of UA was investigated in the presence of interfering acids such as ascorbic acid, citric acid and succinic acid.

Item Type: Article
Funders: Ministry of Education Malaysia: High Impact Research MoEGrant UM.C/625/1/HIR/MoE/SC/04, PRGS grant PR002-2014A, FP039 2016
Uncontrolled Keywords: Composite materials; Nanostructure; Electroactive polymer; Uric acid sensor
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Divisions: Faculty of Science > Department of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 17 Jan 2019 03:07
Last Modified: 17 Jan 2019 03:07
URI: http://eprints.um.edu.my/id/eprint/20034

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