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Facile Preparation of Cu2O Nanoparticles and Reduced Graphene Oxide Nanocomposite for Electrochemical Sensing of Rhodamine B

1
School of Life Science and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
2
Key Laboratory of Functional Metal‒Organic Compounds of Hunan Province; Key Laboratory of Functional Organometallic Materials of Hunan Provincial Universities; Department of Chemistry and Material Science, Hengyang Normal University, Hengyang 421008, China
3
School of Life Sciences and Bioengineering, Nelson Mandela African Institution of Science and Technology, Arusha P.O.BOX 447, Tanzania
*
Authors to whom correspondence should be addressed.
These authors contribute equally to this work.
Nanomaterials 2019, 9(7), 958; https://doi.org/10.3390/nano9070958
Received: 15 May 2019 / Revised: 10 June 2019 / Accepted: 24 June 2019 / Published: 30 June 2019
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Abstract

In this paper, the preparation, characterization, and electrochemical application of Cu2O nanoparticles and an electrochemical reduced graphene oxide nanohybrid modified glassy carbon electrode (denoted as Cu2O NPs‒ERGO/GCE) are described. This modified electrode was used as an electrochemical sensor for the catalytic oxidation of rhodamine B (RhB), and it exhibited an excellent electrochemical performance for RhB. The oxidation potential of RhB was decreased greatly, and the sensitivity to detect RhB was improved significantly. Under optimum conditions, a linear dynamic range of 0.01–20.0 μM and a low detection limit of 0.006 μM were obtained with the Cu2O NPs‒ERGO/GCE by using second‒order derivative linear sweep voltammetry. In addition, the selectivity of the prepared modified electrode was analyzed for the determination of RhB. The practical application of this sensor was investigated for the determination of RhB in food samples, and satisfactory results were obtained. View Full-Text
Keywords: electroanalysis; Cu2O nanoparticles; rhodamine B; reduced graphene oxide electroanalysis; Cu2O nanoparticles; rhodamine B; reduced graphene oxide
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He, Q.; Liu, J.; Tian, Y.; Wu, Y.; Magesa, F.; Deng, P.; Li, G. Facile Preparation of Cu2O Nanoparticles and Reduced Graphene Oxide Nanocomposite for Electrochemical Sensing of Rhodamine B. Nanomaterials 2019, 9, 958.

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