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Development of a Nonenzymatic Electrochemical Sensor for Organophosphate Pesticide Detection Using Copper (II) Oxide Nanorod Electrodes
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Document Title
Development of a Nonenzymatic Electrochemical Sensor for Organophosphate Pesticide Detection Using Copper (II) Oxide Nanorod Electrodes
Author
Sakdarat P., Chongsuebsirikul J., Thanachayanont C., Prichanont S., Pungetmongkol P.
Name from Authors Collection
Affiliations
International School of Engineering (ISE), Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Pathumthani, 12120, Thailand; Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
Type
Article
Source Title
Journal of Nanomaterials
ISSN
16874110
Year
2021
Volume
2021
Open Access
All Open Access, Gold
Publisher
Hindawi Limited
DOI
10.1155/2021/6623668
Format
Abstract
Inorganic electrode materials of low cost, lower complexity, and high stability have become the more preferred choice over enzyme usage in electrochemical sensors. In this work, copper oxide (CuO) nanorods (NRs) were synthesized on copper foil as electrodes through anodization and annealing processes. The synthesized electrodes were used to analyse the organophosphate pesticides (OPPs) and interference molecules by cyclic voltammetry. The CuO NR sensor was able to identify and quantify different kinds of OPPs with an elevated sensitivity of 1.269, 1.425, 1.657, and 2.833 μA/ng mL-1 for chlorpyrifos, parathion, paraoxon, and pirimiphos and explicitly separate them from interference molecules (i.e., carbaryl, paraquat, sodium nitrate, sodium sulphate, and toluene). Moreover, this electrochemical pesticide sensor achieved a very low limit of detection (LOD) in the 10-7 molar level with a high selectivity among all tested analytes. The LOD for each pesticide ranged from 0.29 to 0.61 μM, revealing the ability to define the maximum residue limit in food. In short, our enzyme-free CuO NR sensor is a promising platform to deliver a fast, low-cost, and reliable pesticide detection unit. © 2021 Phichamon Sakdarat et al.
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Rights
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Publication Source
Scopus
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