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Polyvinylpyrrolidone/TiO2 composites’ preparation via sol–gel procedure furthered with non-enzymatic glucose sensing and antibacterial effectiveness

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Abstract

An amperometric non-enzymatic glucose sensing based on polyvinylpyrrolidone and titanium dioxide nanocomposites (PVP–TiO2 NCs) fabricated over stainless-steel (SS) electrode was experimented. The electrode was fabricated of PVP–TiO2 NCs onto SS surface through drop casting coating. The NCs and the electrode were analyzed using Fourier transform infrared (FTIR) and UV–visible (UV–Vis) spectroscopy, X-ray diffraction spectra (XRD), X-ray photoelectron spectra (XPS), particle analyzer, scanning electron microscopy (SEM), EDS and transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET) analysis for surface. For electrochemical investigation, cyclic voltammetry, electrochemical impedance spectra, including Nyquist plots and Bode plots, and chronoamperometry were adopted. PVP-TiO2/SS-modified electrode manifested high sensitivity of 360.13 µA/mM.cm2, lower detection limit of 756.8 µM and 0 to 13 mM linear range with regression coefficient of R2 = 0.992. The electrode exhibited high stability with good anti-interference tendency against fructose, uric acid, ascorbic acid and sucrose. The modified electrode also performed well in real sample glucose detection. Further, PVP–TiO2 NCs performed appreciably toward antibacterial studies against some Gram-positive and Gram-negative deleterious bacteria, Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, Shigella flexneri microbes.

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Funding

The authors are obligated to Council of Scientific and Industrial Research, New Delhi, India, for awarding fellowship to Meena (award letter no. 09/1063(0028)/2019-EMR-I) and Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Sonepat, Haryana, for providing necessary facilities.

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All authors contributed to study conception and design. Conceptualization, material synthesis, methodology, data preparation and draft writing were performed by Meena Yadav. The conceptualization, methodology, draft editing and formal analysis of the manuscript were taken up by Suman Lata and Geeta Singh. Authors read and approved the final manuscript.

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Correspondence to Suman Lata.

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Yadav, M., Singh, G. & Lata, S. Polyvinylpyrrolidone/TiO2 composites’ preparation via sol–gel procedure furthered with non-enzymatic glucose sensing and antibacterial effectiveness. Environ Sci Pollut Res 30, 98563–98580 (2023). https://doi.org/10.1007/s11356-022-21558-3

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  • DOI: https://doi.org/10.1007/s11356-022-21558-3

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