Tungsten sulphide decorated carbon nanotube based electroanalytical sensing of neurotransmitter dopamine

Here, a tungsten sulphide-decorated multi-walled carbon nanotube (WS2/MW-CNT) modified GCE was fabricated to enable electroanalytical detection of dopamine. The prepared nanomaterial was characterized using FE-SEM, EDS, HR-TEM, XRD, and FTIR techniques. The electrochemical performance of the prepare...

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Bibliographic Details
Published in:Electrochimica acta 2024-01, Vol.475, p.143584, Article 143584
Main Authors: Kumar, Sachin, Sharma, Ritika, Singh, Dilbag, Awasthi, Abhishek, Kumar, Vineet, Singh, Kulvinder
Format: Article
Language:English
Subjects:
Dopamine
DPV
Electrochemical sensing
Metal chalcogenides
Multiwall carbon nanotubes
Tungsten disulphide
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Summary:Here, a tungsten sulphide-decorated multi-walled carbon nanotube (WS2/MW-CNT) modified GCE was fabricated to enable electroanalytical detection of dopamine. The prepared nanomaterial was characterized using FE-SEM, EDS, HR-TEM, XRD, and FTIR techniques. The electrochemical performance of the prepared WS2/MW-CNT towards detecting the neurotransmitter dopamine was achieved using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The CV analysis showed that the prepared heterostructure nanomaterial significantly enhances electrocatalytic activity, thereby enhancing the sensing performance. The WS2/MW-CNT modified GCE exhibited a 345 % increase in oxidative peak current value compared to the bare GCE electrode. The DPV technique-based sensing results showed linearity in a concentration range of 1 µM to 22 µM with a LOD of 0.55 µM. The prepared sensing platform demonstrated remarkable selectivity in the presence of interferent substances such as epinephrine and ascorbic acid. Furthermore, WS2/MW-CNT/GCE provided acceptable results during the stability study. [Display omitted]
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2023.143584