Eco-Friendly Liquid-Phase Synthesis and Characterization of Graphene Oxide Films for Chemical Sensor Applications : Eco-Friendly Liquid-Phase Synthesis and Characterization of Graphene Oxide Films

Medina Umar; D. A. Buba Abdul; Ogbonaya Victor; Abubakar Ramalan

Authors

Medina Umar Department of Physics, University of Abuja, FCT, Abuja
D. A. Buba Abdul Department of Physics, University of Abuja, FCT, Abuja
Ogbonaya Victor Department of Physics, University of Abuja, FCT, Abuja
Abubakar Ramalan Department of Physics, University of Abuja, FCT, Abuja

Keywords:

Eco-friendly synthesis, Graphene oxide film, Green liquid-phase, Nanotechnology

Abstract

The significant demand for sustainable materials in nanotechnology has spurred the discovery of wonder materials like graphene and its derivatives, such as graphene oxide (GO) and reduced graphene oxide. These materials are prized for their unique structural, electrical, and optical properties. However, conventional production methods often involve hazardous chemicals and high temperatures, posing risks to human health and the environment. This research presents an eco-friendly method for synthesizing and depositing graphene oxide using spin coating, resulting in thin films with uniform structural, optical, and electrical properties. Scanning Electron Microscope analysis at 1µm magnification revealed a wrinkled morphology characteristic of GO. Raman spectroscopy showed a G band at ~1600 cm⁻¹ and a D band at ~1350 cm⁻¹, confirming the presence of graphitic domains and structural defects, respectively. UV-Vis spectroscopy analysis revealed an absorption peak at 232 nm and a shoulder around 294 nm, verifying the successful oxidation and exfoliation of graphite into GO with well-defined optical characteristics. Furthermore, a linear I-V curve indicated consistent electrical behavior across the film.

Eco-Friendly Liquid-Phase Synthesis and Characterization of Graphene Oxide Films for Chemical Sensor Applications