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Synthesis of manganese dioxide nanorods-anchored graphene oxide composite for highly sensitive electrochemical sensing of dopamine

Abstract

In this research, a novel manganese dioxide nanorods-anckored graphene oxide (MnO2 NRs/GO) composite was synthesized by a simple hydrothermal method for the electrochemical sening application. A highly sensitive electrochemical sensor for dopamine (DA) was constructed by MnO2 NRs/GO modified glassy carbon electrode (GCE). The morphology and performance of composite material and modified GCEs were investigated by scanning electron microscopy (SEM), X-ray diffraciton (XRD) and cyclic voltammetry (CV), respectively. The resultant MnO2 NRs/GO) composite has large electroactive area and shows excellent electrochemical activity to DA. Under the optimal conditions, the DA sensor shows a proportional linearity to DA concentration of 0.1 μM-0.08 mM and 0.08-0.41 mM with a low detection limit of 0.027 μM, and high sensitivity of 602.4 μA·mM-1·cm-2. The MnO2 NRs/GO composite provides a promising platform for the construction of highly sensitive and selective sensor of DA.

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Article information


Submitted
16 Feb 2020
Accepted
17 Mar 2020
First published
25 Mar 2020

Analyst, 2020, Accepted Manuscript
Article type
Paper

Synthesis of manganese dioxide nanorods-anchored graphene oxide composite for highly sensitive electrochemical sensing of dopamine

Z. Yang, J. Li, H. Shen, S. Yu, G. Zhang, C. Ren and X. Hu, Analyst, 2020, Accepted Manuscript , DOI: 10.1039/D0AN00348D

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