Effect of rGO wt.% on the Preparation of rGO/CuO Nanocomposites at Different Test Periods and Temperatures

• Published in: Crystals (Basel) Vol. 12; no. 10; p. 1325
• Main Authors: Alanazi, Abdullah K., Abo-Dief, Hala M., Alothman, Zaid A., Mohamed, Ashraf T., Pramanik, Tanay, Fallata, Ahmed M.
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.10.2022
• Subjects: Activated carbon; Biomass; Capacitance; Cavitation; Copper oxide; Copper oxides; Crystal structure; Crystallinity; Crystallites; Cuprite; cyclic voltammetry; dynamic light scattering; Electrochemical analysis; electrochemical performance; Energy storage; FTIR spectroscopy; Graphene; Graphite; Hydrogen; Lignin; Nanocomposites; Nanomaterials; Nanoparticles; Nanostructured materials; Nitrates; Performance indices; Photocatalysis; Photon correlation spectroscopy; Porous materials; rGO/CuO nanocomposites; Spectrum analysis; Systems stability; Temperature; Thin films; XRD; Saudi Arabia; Massachusetts
• ISSN: 2073-4352; 2073-4352
• DOI: 10.3390/cryst12101325

In this study, we synthesized a reduced form of graphene oxide/copper oxide (rGO/CuO) nanocompounds produced at rGO wt. of 0.125%, 0.25%, 0.5% and 1%. The crystallinity indexes for rGO and rGO/CuO increased, and that for CuO decreased as the test temperatures increases, while the crystallinity indexes of rGO, CuO and rGO/CuO decreases with test periods increment. Measurement by dynamic light scattering reported average crystallite sizes of 0.7, 8.8, 25.4, 38.5 nm for 0.125 wt.% rGO/CuO, 0.25 wt.% rGO/CuO, 0.50 wt.% rGO/CuO and 1.0 wt.% rGO/CuO respectively. The electrochemical properties of the nanocomposites were checked. The rGO/CuO XRD peaks were 18.114320 Å, 225.1856 Å, 321.41740 Å, and 365.98290 Å, with 11.051640%, 0.461075%, 0.280083%, and 0.174259% for 2ϴ of 22.2031°, 43.5865°, 50.7050°, and 74.3729°, respectively. FTIR spectroscopy identified the existence of vibrational frequencies with pseudo-capacitance at 458 cm−1 which confirmed the presence of rGO-CuO nanoparticles. The voltammetry of rGO-CuO indicated the increment of electrochemical activity, large capacitance, and conduction in the reduced rGO/CuO composite. For rGO wt. of 0.125%, 0.25%, 0.5%, and 1.0%, the rGO/CuO composite specific capacitance was 561 F/g, 582 F/g, 597 F/g, and 611 F/g, respectively, which indicated good electrochemical performance.