Characterization of Graphite Oxide and Reduced Graphene Oxide Obtained from Different Graphite Precursors and Oxidized by Different Methods Using Raman Spectroscopy

Abstract

In this paper, the influences of the graphite precursor and the oxidation method on the resulting reduced graphene oxide (especially its composition and morphology) are shown. Three types of graphite were used to prepare samples for analysis, and each of the precursors was oxidized by two different methods (all samples were reduced by the same method of thermal reduction). Each obtained graphite oxide and reduced graphene oxide was analysed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy (RS).

One-step dry synthesis of an iron based nano-biocomposite for controlled release of drugs

“…The ratio of the intensity of D band to G band (I D /I G ) indicates the amount of defects present in the material. 31,32 The Raman spectrum for nano Fe-CNB is exhibited in Fig. 5, where the D band is observed at 1348 cm À1 and the G band at 1590 cm À1 , respectively which is in good agreement with those reported in the literature.…”

“…Thus, the defects in the material are attributed to the functionalization of graphitic carbon. 31 The spectrum around wavenumber 299 and 412 cm À1 correspond to a-Fe 2 O 3 , 33,34 and that of 668 cm À1 corresponds to Fe 3 O 4 . 24,35 However, the absence of a peak around wavenumber 721 cm À1 indicates that there is no maghemite.…”

Synthesis of Graphene Oxide and Reduced Graphene Oxide From Graphite Foil Industrial Wastes

“…The obtained results correspond to the available data of processes used flake graphite or expanded graphite as a precursor. 4,13,14 In case of low-temperature mode oxidation of pGFW, the C/O ratio (at.%) was found to be 61:38. During its reduction with ascorbic acid, the C/O ratio was modified to be 81:19.…”

“…It is established that the reduction of the GO obtained from the samples of the different types of graphite are formed graphenes, in which the number of layers was very different (1-10 layers or more). [12][13][14][15][16] Flexible graphite foils in various thickness and width are used in modern technologies (chemical, petrochemical, metallurgical processes, for the production of ceramic composites). 17 The remaining graphite foil pieces (wastes) are expanded graphites, and their chemical oxidation to GO or to obtain graphene can be conducted using known methods with some adjustments.…”

Simple and Robust Fabrication and Characterization of Conductive Carbonized Nanofibers Loaded with Gold Nanoparticles for Bone Tissue Engineering Applications

“…D-band and G-band of the spectra represent graphitic carbon and structural disorder near the edge of crystalline structure, respectively, and the ratio of peak intensity is generally used for characterizing structural disorder. G-band appears near 1582 cm -1 , while D-band is found around 1350 cm -1 [55][56][57]. Raman spectrum of the samples were performed using Teksan Takram P50C0R10 raman spectrometer (laser wavelength: 532 nm, laser power: 0.5-70 mW).…”