Repository of Research and Investigative Information

Repository of Research and Investigative Information

Kurdistan University of Medical Sciences

Electrocatalytic activity of manganese oxide nanosphere immobilized onto deoxyribonucleic acid modified electrode: Application to determine environmental pollutant thiourea at natural pH

(2017) Electrocatalytic activity of manganese oxide nanosphere immobilized onto deoxyribonucleic acid modified electrode: Application to determine environmental pollutant thiourea at natural pH. Journal of Colloid and Interface Science.

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Official URL: https://www.scopus.com/inward/record.uri?eid=2-s2....

Abstract

Based on immobilizing manganese oxide nanospheres (MnOxNsph)/deoxyribonucleic (DNA) on glassy carbon electrode (MnOxNsph/DNA/GCE), a new electrochemical biosensor for the detection of thiourea (TU) was fabricated. In order to prepare DNA template, cyclic voltammetry (CV) method was used. Scanning electron microscopy (SEM) was used for characterization of MnOx/DNA. Electrochemical impedance spectroscopy was utilized to confirm the successful stepwise assembly procedure of the biosensor. The electrocatalytical behaviors of the biosensor were also investigated by cyclic voltammetry and differential pulse voltammetry (DPV). The results showed that MnOxNsph/DNA exhibited a remarkable electrocatalytic activity for the oxidation of TU under optimal conditions. The linear range, detection of limit and sensitivity were calculated for oxidation peaks (OX1 and OX2). This electrode demonstrated many advantages such as high sensitivity, low detection of limit, excellent catalytic activity at natural pH values, remarkable antifouling property toward TU and its oxidation product for the two oxidation peaks. © 2017

Item Type: Article
Keywords: Biosensors; Carbon; Catalyst activity; Catalytic oxidation; Cyclic voltammetry; DNA; Electrocatalysis; Electrochemical electrodes; Electrochemical impedance spectroscopy; Electrodes; Glass membrane electrodes; Manganese; Nanospheres; Nucleic acids; Oxidation; Oxides; Scanning electron microscopy; Thioureas; Voltammetry, Acid-modified electrodes; Amperometry; Antifouling property; Differential pulse voltammetry; Electrocatalytic activity; Electrochemical biosensor; Environmental pollutants; Glassy carbon electrodes, Manganese oxide, DNA; manganese oxide; nanosphere; thiourea, Article; biosensor; catalysis; cyclic potentiometry; differential pulse voltammetry; DNA template; electrochemical analysis; electrochemical impedance spectroscopy; electrode; immobilization; limit of detection; oxidation; pH; pollutant; priority journal; scanning electron microscopy
Page Range: pp. 579-585
Journal or Publication Title: Journal of Colloid and Interface Science
Volume: 504
Publisher: Academic Press Inc.
Identification Number: 10.1016/j.jcis.2017.06.016
ISSN: 00219797
Depositing User: مهندس مهدی شریفی
URI: http://eprints.muk.ac.ir/id/eprint/167

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