Study of structural, optical and electrochemical properties of GO/TiO2 nanostructures prepared by microwave-assisted technique for its application as a glucose sensor

• Published in: Advances in natural sciences. Nanoscience and nanotechnology Vol. 12; no. 3
• Main Authors: Gijare, Medha, Chaudhari, Sharmila, Ekar, Satish, Garje, Anil
• Format: Journal Article
• Language: English
• Published: Hanoi IOP Publishing 01.09.2021
• Subjects: biosensor; Chemical composition; Chemoreception; Electrochemical analysis; Electrochemistry; Electrodes; Fluorine; Glucose; Graphene; Graphene oxide; microwave heating; Morphology; Nanocomposites; nonenzymatic; Optical properties; Response time; Substrates; Tin; Tin oxide; Tin oxides; Titanium dioxide; Voltammetry; X ray photoelectron spectroscopy
• ISSN: 2043-6254; 2043-6262
• DOI: 10.1088/2043-6262/ac2ba4

The present work proposes a microwave-assisted technique for the synthesis of graphene oxide and titanium dioxide (GO/TiO2) nanocomposite. XRD, FESEM, EDS, UV, FTIR, Raman, and XPS spectroscopy were employed to study the elemental composition and surface morphology of the nanocomposite. FESEM revealed the spherical morphology of GO/TiO2 nanocomposite. It was observed that nanosized densely packed spherical TiO2 particles were attached to graphene sheets. A modified electrode was prepared using fluorine-doped tin oxide (FTO) substrate for electrochemical detection of the non-enzymatic glucose sensor. Linear sweep voltammetry (LSV) and cyclic voltammetry (CV) were adopted for the electrochemical measurements of GO/TiO2/FTO electrodes. The high sensitivity of 426.5 μA mM−1.cm2, the linear detection range of 0.1 mM to 11 mM, the low detection threshold of 0.1 μM along with quick response time of 6 s towards glucose sensing are some highlights of the prepared electrode. Moreover, the microwave technique used for the preparation of GO/TiO2 composite is rapid and cost-effective.