Abstract

Graphene–tantalum oxide (${\mathrm{Ta}}_2{\mathrm{O}}_5$) hybrid material is synthesized using a simple hydrothermal method to elucidate its optical properties. The prepared sample is characterized by X-ray diffraction, scanning electron microscope (SEM), high-resolution–transmission electron microscope (HR-TEM), thermo-gravimetric and differential thermal analysis (TG-DTA), Fourier transform–Raman spectra, and photoluminescence (PL) studies. SEM and HR-TEM analysis revealed that the ${\mathrm{Ta}}_2{\mathrm{O}}_5$ particles are embedded on the surface of thin sheets of well-defined graphene structure. Thermogravimetric analysis has provided substantial evidence for the thermal stability of the material with minimal percentage of weight loss at 700°C. Further, the excitation of the nanocomposite at a wavelength of 280 nm leading to emission spectra at 567 nm using PL studies, which clearly indicates the emission of light, occurs in the visible green region.

© 2019 Optical Society of America

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