Nano Au decorated hybrid Cu2O cubes for non-enzymatic glucose sensing in beverages.

Non-enzymatic detection of glucose is important and is found useful not only in clinical settings but also for quality analysis in food and beverages industry. The fabrication of a good electrocatalyst demands for excellent activity, stability, and easy synthesis methods. Herein, a non-enzymatic glucose sensor has been constructed using Au nanoparticles decorated over Cu2O cubes (Cu2O/nAu) synthesized via a simple cost-effective microwave-assisted technique. The preliminary characterizations including UV–Vis spectroscopy (UV–Vis), Scanning electron microscopy, and Elemental mapping confirmed the formation of Au-decorated over the Cu2O cubes and proved gold nanoparticles were decorated over the cubic structure of the Cu2O. Furthermore, the fabricated Cu2O/nAu was applied for non-enzymatic glucose detection in 0.1 M KOH. The modified glassy carbon electrode of Cu2O/nAu (Cu2O/nAu/GCE) exhibited a linear range from 10 µM to 1 mM for glucose with a limit of detection of 1 µM. The as-developed glucose sensor demonstrates outstanding electrocatalytic activity for the oxidation of glucose with strong stability and high reproducibility. The practical applicability of the developed sensor for non-enzymatic glucose detection was demonstrated by studying artificial sweetener, and commercially available glucose drink. Thus, the as-developed Cu2O/nAu/GCE have the potential for the development of a sensor for analyzing glucose in food and beverages. A simple and non-enzymatic glucose sensor with Nano Au Decorated Hybrid Cu2O cubes is demonstrated. The sensor exhibited a linear range from 10 µM to 1 mM for glucose with a limit of detection of 1 µM. The practical applicability was demonstrated with commercially available glucose drink and artificial sweetener [ABSTRACT FROM AUTHOR]