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

Abstract

In this paper, various graphite oxide (GO) and reduced graphene oxide (rGO) preparation methods are analyzed. The obtained materials differed in their properties, including (among others) their oxygen contents. The chemical and structural properties of graphite, graphite oxides, and reduced graphene oxides were previously investigated using Raman spectroscopy (RS), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). In this paper, hierarchical clustering analysis (HCA) and analysis of variance (ANOVA) were used to trace the directions of changes of the selected parameters relative to a preparation method of such oxides. We showed that the oxidation methods affected the physicochemical properties of the final products. The aim of the research was the statistical analysis of the selected properties in order to use this information to design graphene oxide materials with properties relevant for specific applications (i.e., in gas sensors).

Synergistic effect of graphene oxide and hydroxylated graphene on the enhanced properties of cement composites

“…288.62 eV), which was in line with other studies. 43,44 While a signicant shi of the binding energies of C-O and C]O were observed in the C 1s spectrum of GO@Ca 2+ (Fig. 2c), which further veried that there was chemical bonding between GO and Ca 2+ .…”

Ball milled glyco-graphene oxide conjugates markedly disrupted Pseudomonas aeruginosa biofilms

“…The positions of the D and G band maxima are related to the hybridization of carbon atoms, while the ratio between their intensities (I D /I G ) accounts for the degree of order within the material. 58 From Table 1, no major variations in the I D /I G ratio emerge between different samples, indicating that both the ball milling process and the conjugation with monosaccharides do not signifi- cantly alter the degree of order present in the original GO. In contrast, significant shifts in the positions of the G and D bands with respect to the pristine GO are observed for GObm, Fuc-GO 1, Gal-GO 2, and Man-GO 3, i.e., a 3-8 cm −1 blue shift and a 3-20 cm −1 red shift for the G and D bands, respectively.…”

Tribological behavior of biomedical gradeUHMWPEwith graphite‐based fillers againstEBM‐Ti6Al4V pinunder various lubricating conditions

“…The presence of oxygen atoms produces changes in the properties of the vibrations in the material lattice as well as an increase in the interplanar distance. As a result, oxidized graphite Raman spectra have a more intense D peak than unoxidized graphite 46 . In details, the D‐line and the G‐line position, intensity, and ratio are listed in Table 2.…”