Characterization of MgO Cubic Nanocrystals Synthesized and Deposited on rGO Nanosheets

The present study focuses on synthesizing rGO and MgO/rGO nanoparticles using Hummer's and co-precipitation methods. Using X-ray diffraction (XRD), High-resolution transmission electron microscopy (HR-TEM), Energy dispersive X-ray analysis (EDAX), Fourier transform infrared spectroscopy (FTIR), Ultraviolet-visible spectroscopy (UV-Vis), Photo-luminescence spectroscopy (PL), and Cyclic voltammetry (CV), the synthesized rGO and MgO/rGO nanoparticles were characterized structurally, morphologically, and optically. The XRD data revealed the cubic structure of the nanoparticles. The dislocation density value was 0.3185x1015 and the Debye-Scherrer formula determined the crystallite size as 56.0316 nm. According to UV data, the absorption peak was located at a wavelength of 267 nm, and the band gap value was 4.6441 eV. The vibration frequency parameters of MgO at 548 cm-1 were in good agreement with the published research. The elements in magnesium and oxygen were verified by Energy-dispersive X-ray analysis. The photoluminescence spectrum displayed green, blue, and violet emissions from rGO and MgO/rGO nanoparticles. For rGO and MgO/rGO nanoparticles, the specific capacitance values were determined to be 18 F/g and 51F/g, respectively.