XRD-HTA, UV Visible, FTIR and SEM Interpretation of Reduced Graphene Oxide Synthesized from High Purity Vein Graphite

Abstract

Attempts were made to synthesize high quality graphite oxide (GO) and reduced graphene oxide (rGO) by using successive oxidation-reduction process of high quality vein graphite from Sri Lanka. We report the lowest optimum reduction temperature for converting GO to rGO which has been systematically studied using X-ray diffraction spectroscope (XRD) with the high temperature heating attachment (HTA) for the first time. The effect of particle size of graphite on properties of GO and rGO is also compared using commercially available graphite of particle size of ~111 mm and ball-milled graphite of particle size ~37 mm. The GO and rGO were characterized using XRD, UV-Visible spectroscopy, Fourier Transform Infrared spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The GO and rGO synthesized from ball-milled graphite showed higher oxidation and reduction properties as verified through the UV-Vis and FTIR analysis. The SEM analysis revealed that the splitting of graphene layers is efficiently taken place in GO from ball-milled graphite. The lowest optimum temperature for thermal reduction of GO to rGO was found to be at 475 °C. FTIR confirmed the removal of most of the functional groups in rGO and according to the BET surface area analysis few layers, supposed to be 2-6 is formed. The efficient oxidation and reduction process of smaller particle size graphite has led to yield highly oxidized GO and high quality rGO which can be used to prepare high quality graphene for future applications.

Graphene Ink Modified Glassy Carbon Electrode as electrochemical sensor for Galantamine Determination

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Carbon-Based Catalyst from Pyrolysis of Waste Tire for Catalytic Ethanol Dehydration to Ethylene and Diethyl Ether

“…Crystal structures of the catalyst samples were detected with an X-ray di ractometer (XRD). It can be seen from the International Journal of Chemical Engineering XRD patterns in Figure 2 that all samples exhibited the similar crystal structures revealing the characteristic peaks of graphite at around 2θ 26 [21]. e sharper peaks appeared with the higher activation temperature.…”

Complex Permittivity and Electromagnetic Interference Shielding Effectiveness of OPEFB Fiber-Polylactic Acid Filled with Reduced Graphene Oxide

“…The characteristic band at 2991 cm −1 to 2976 cm −1 corresponds to C–H stretching vibrations, 1652 cm −1 (C=C skeletal vibration), 1521 cm −1 (C–C stretching), 1121 cm −1 (C–O–C stretching), and 874 cm −1 (C=O stretching) [ 31 ]. Furthermore, the absorption bands at 1343 cm −1 to 1419 cm −1 correspond to C–OH stretching, 2927 cm −1 C–H stretching, and 3395 cm −1 (O–H vibration) [ 32 ]. A shift in characteristic bands (1754 cm −1 ) is noticed in the FTIR spectra when the composite particles have a strong interaction.…”