Synthesis and characterization of layered Nb2C MXene/ZnS nanocomposites for highly selective electrochemical sensing of dopamine. Issue 2 (15th January 2021)

• Record Type: Journal Article
• Authors: Arif, Nimrah; Gul, Sundus; Sohail, Manzar; Rizwan, Syed; Iqbal, Mudassir
• Is Part Of: Ceramics international. Volume 47:Issue 2(2021)
• Page Start: 2388
• Page End: 2396
• Publication Date: 2021-01-15
• Subjects: 2D nanomaterials -- Nb2C-MXene -- Zinc sulphide -- Dopamine -- Electrochemical sensing -- Differential pulse voltammetry; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.09.081
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: MXenes, due to their exceptional properties, are tagged as materials of future in the field of two dimensional (2D) materials. Niobium carbide (Nb2 C) is an important member of MXene family having vast application in the field of lithium ion batteries and supercapacitors. However, its applications in the field of sensing have not been explored yet. This research work reports the synthesis and application of Nb2 C/ZnS nanocomposite for the sensing of dopamine (DA) for the first time. The etching of Nb2 C from parent MAX phase (Nb2 AlC) was performed at 55 °C. The application of Nb2 C electrode for the electrochemical sensing of DA was employed through differential pulse voltammetry (DPV). Zinc sulphide (ZnS) nanoparticles were synthesized hydrothermally to enhance the electrochemical properties of Nb2 C. The characterization of these prepared samples was done with the help XRD, SEM, EDS, and of FTIR spectroscopy. The MXene-ZnS nanocomposite modified glassy carbon electrode (GCE) proved to be a very effective electrode material to detect dopamine electrochemically with a wide linear detection range of 0.09–0.82 mM, a very low detection limit of 1.39 μM and excellent sensitivity of 12.1 μAμM -1 . The modified glassy carbon electrode also proved to be exceptionally selective towards dopamine in the presence of interfering agents like ascorbic acid, citric acid and glucose. Highlights: First report of Nb2 C MXene, ZnS nanoparticles and MXene-ZnS nanocomposite for electrochemical sensing of dopamine. MXene-ZnS derived electrode with detection range of 0.09–0.82 mM, detection limit of 1.39 μM and sensitivity of 12.1 μA/μM. Highly sensitive and selective electrode towards dopamine and no detection of ascorbic acid, citric acid and glucose.