Microwave-assisted facile synthesis of layered reduced graphene oxide-tungsten disulfide sandwiched Fe3O4 nanocomposite as effective and sensitive sensor for detection of dopamine

二硫化钨 纳米复合材料 石墨烯 材料科学 结晶度 氧化物 纳米技术 纳米颗粒 化学工程 二硫化钼 电化学气体传感器 电化学 复合材料 化学 电极 冶金 物理化学 工程类
作者
Dharmender Singh Rana,Shiwani Kalia,Rajesh Kumar,Nagesh Thakur,Dilbag Singh,Rajesh Kumar Singh
出处
期刊:Materials Chemistry and Physics [Elsevier BV]
卷期号:287: 126283-126283 被引量:45
标识
DOI:10.1016/j.matchemphys.2022.126283
摘要

The exceptional properties of two-dimensional (2D) organic/inorganic layered materials make them a promising candidate for use in electrochemical sensing application. In this research study, the combination of two different layered materials as reduced graphene oxide (rGO) nanosheets and tungsten disulfide (WS2) separated by Fe3O4 nanoparticles, have been synthesized by microwave irradiation method for the detection of dopamine. Microwave-assisted synthesis of heterostructure rGO-WS2@Fe3O4 nanocomposite is a simple, cost-effective, high-yield and short-reaction time approach. The phase formation, surface morphology and structural properties of the nanocomposite show that the presence of Fe3O4 nanoparticles in between separated layers of rGO and WS2 nanosheets prevent the agglomeration of nanoparticles as well as the restacking of the 2D layered materials. Due to well-defined morphologies and crystallinity, as-synthesized rGO-WS2@Fe3O4 nanocomposite was used as an efficient biosensor for the detection of dopamine, a neurotransmitter. The rGO-WS2@Fe3O4 nanocomposite was found to show a low limit of detection (LOD) i.e., 2.74 μM with the sensitivity of 3.18 μA μM−1 cm−2 for dopamine at a low potential of 0.2 V. Therefore, it is expected that the microwave-assisted cost-effective route can be developed for rGO combined with other inorganic layered materials to design electrochemical sensors for the determination of biological and pharmaceutical samples.

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