Abstract
Consumption of fruits leads to increase in glucose level in blood for diabetic patients, which in turn leads to peripheral, vascular, ocular complications and cardiac diseases. In this context, a non-enzymatic hybrid glucose biosensor was fabricated for the first time to detect glucose by immobilizing titanium oxide–manganese oxide (TiO2–Mn3O4) nanocomposite and chitosan membrane on to the surface of Pt working electrode (Pt/TiO2–Mn3O4/chitosan). TiO2–Mn3O4 nanocomposite catalyzed the oxidation of glucose to gluconolactone in the absence of glucose oxidase enzyme with high electron transfer rate, good biocompatibility and large surface coverage. Electrochemical measurements revealed the excellent sensing response of the developed biosensor towards glucose with a high sensitivity of 7.073 µA mM−1, linearity of 0.01–0.1 mM, low detection limit of 0.01 µM, reproducibility of 1.5% and stability of 98.8%. The electrochemical parameters estimated from the anodic process were subjected to linear regression models for the detection of unknown concentration of glucose in different fruit samples.
Highlights
Glucose, a monomer with the molecular weight of 180.16 g, is the most significant source of energy (Ameen et al 2016) in living organisms
Consumption of fruits leads to increase in glucose level in blood for diabetic patients, which in turn leads to peripheral, vascular, ocular complications and cardiac diseases
The lower Epa value signified that the TiO2–Mn3O4 nanocomposites decreased the working potential needed for the oxidation of glucose to gluconolactone
Summary
A monomer with the molecular weight of 180.16 g, is the most significant source of energy (Ameen et al 2016) in living organisms. A non-enzymatic hybrid glucose biosensor was fabricated for the first time to detect glucose by immobilizing titanium oxide–manganese oxide (TiO2– Mn3O4) nanocomposite and chitosan membrane on to the surface of Pt working electrode (Pt/TiO2–Mn3O4/chitosan).
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