A novel CuO–N-doped graphene nanocomposite-based hybrid electrode for the electrochemical detection of glucose

• Published in: Applied physics. A, Materials science & processing Vol. 123; no. 10; pp. 1 - 9
• Main Authors: Felix, Sathiyanathan, Kollu, Pratap, Jeong, Soon Kwan, Grace, Andrews Nirmala
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2017; Springer Nature B.V
• Subjects: Applied physics; Biological properties; Catalysts; Characterization and Evaluation of Materials; Condensed Matter Physics; Copper oxides; Copper sulfate; Electrochemical analysis; Electron microscopes; Emission analysis; Field emission microscopy; Glucose; Graphene; Machines; Manufacturing; Materials science; Nanocomposites; Nanotechnology; Optical and Electronic Materials; Oxidation; Phase (cyclic); Physics; Physics and Astronomy; Processes; Response time; Sensors; Surfaces and Interfaces; Synthesis; Thin Films
• DOI: 10.1007/s00339-017-1217-6
• ISSN: 0947-8396

We report a catalyst of N-doped graphene CuO nanocomposite, for the non-enzymatic electrocatalytic oxidation of glucose. The hybrid nanocomposite was synthesized by copper sulfate, cetyl ammonium bromide and graphite as starting materials. The synthesized composites were characterized with the techniques like X-ray diffraction, field emission scanning electron microscopy, transmission electron microscope to study the crystalline phase and morphological structure. Based on this composite, a non-enzymatic glucose sensor was constructed. Cyclic voltammetry and chronoamperometry methods were done to investigate the electrocatalytic properties of glucose in alkaline medium. For glucose detection, the fabricated sensor showed a linear response over a wide range of concentration from 3 to 1000 µM, with sensitivity of 2365.7 µA mM −1  cm −2 and a fast response time of 5 s. The designed sensor exhibited negligible current response to the normal concentration of common interferents in the presence of glucose. All these favorable advantages of the fabricated glucose sensor suggest that it may have good potential application in biological samples, food and other related areas.