Magnetic TiO2-nZVI nanofibers: A highly efficient platform for electrochemical dopamine detection

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Vol. 310; p. 117719
• Main Authors: Qureashi, Aaliya, Nazir, Irfan, Fatima, Kaniz, Haq, Zia-ul, Ahmad Ganaie, Firdous, Rafiq, Muheeb, Saleem Khan, Rumysa, Hamid Rather, Anjum, Bashir, Arshid, Hussain Pandith, Altaf, Majeed, Shafquat, Sheikh, Faheem A
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2024
• Subjects: Dopamine; Electrochemical sensing; Environmental; Nanofibers; Neurotransmitters; Electrochemical sensing; Neurotransmitters; Environmental; Dopamine; Nanofibers
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2024.117719

•Efficient dopamine detection using TiO2-PVAc-nZVI nanofibers via electrospinning.•High surface area, excellent conductivity, and magnetic properties enhance performance.•Achieved low detection limit of 1.50 μM through cyclic voltammetry and chronoamperometry.•Superior stability confirmed by chronopotentiometry; ideal for long-term applications.•Successful real-time dopamine analysis in blood samples with excellent recovery rate. Efficient electrochemical sensing of dopamine using titanium dioxide (TiO2) coated with magnetic zero-valent iron (nZVI) nanofibers is achieved. A simple electrospinning method is used to impart magnetic properties of nZVI to the electrospun nanofibers prepared by using poly(vinyl acetate (PVAc) as a base polymer to harbor TiO2 and magnetic nZVI. This synthesis of TiO2-PVAc-nZVI nanofibers incorporates the properties of both materials, combining the high surface area of 1D nanofibers with excellent conductivity and magnetic properties. The as-synthesized TiO2-PVAc-nZVI nanofibers exhibit a significantly high surface area, which can host numerous functional groups, facilitating rapid catalysis and efficient detection of dopamine. The electrochemical performance of the TiO2-PVAc-nZVI nanofibers was thoroughly investigated through cyclic voltammetry and chronoamperometry techniques. This material demonstrates outstanding electrochemical efficacy in detecting dopamine, with low detection limits of ca. 1.50 μM. Moreover, the chronopotentiometry response indicates exceptional and superior stability, making it a desirable material for long-term applications.