Highly sensitive, non-enzymatic and precious metal free electrochemical glucose sensor based on Ni–Cu/TiO2 modified glassy carbon electrode

Abdul Raziq, Muhammad Tariq, Riaz Hussain, Muhammad H. Mahmood, Inam Ullah, Jahanjeer Khan, Mamriz Mohammad

Abstract


Herein we report a facile one step synthesis of Ni-Cu supported on TiO2 alloy nanoparticles through polyol method, which reflect high catalytic performance in enzymeless electrochemical glucose sensing.  The morphology imaging and physical properties of Ni-Cu/TiO2 nanocomposite were characterized by scanning electron microscopy (SEM), X-rays diffraction (XRD) analysis, and energy dispersive x-rays spectroscopy (EDS). The electrochemical studies/characterizations of glucose oxidationwere carried out in the basic medium and the new sensorwas found better electrochemical glucose sensor than Ni/TiO2/Ti and CuO/TiO2/Ti modified electrodes. The fabricated sensor is highly sensitive (719.9 µA mM-1 cm-2), it has awide linear range (from 0.1 to6 mM), it is selective and it shows tolerance towards endogenous species such as ascorbic acid, uric acid, acetaminophen, and sodium chloride.


Keywords


SEM; cyclic voltammetry; chronoamperometry; polyol method

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DOI: https://doi.org/10.2298/JSC170927025R

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