▎ 摘　　要

Graphene-tantalum oxide (Ta2O5) 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 Ta2O5 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 degrees 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. (C) 2019 Optical Society of America