Caracterización de grupos funcionales de suspensiones de grafeno multicapa en etanol y dimetilformamida (Dmf), usando espectroscopia infrarroja

Abstract

The aim of this study was to characterise the functional groups present in graphene suspensions in ethanol and dimethylformamide (DMF) by infrared spectroscopy. The characterisation of functional groups present in graphene suspensions in ethanol and dimethylformamide was carried out with the infrared spectroscopy technique, which allows us to identify functional groups attached to any material in solid, liquid or gaseous state, by means of its vibrational transmittance spectrum in the IR range of the electromagnetic spectrum on a sample, a monochromatic beam of infrared light was transmitted through the sample, and the amount of energy transmitted was recorded, repeating this operation over a range of wavelengths of interest (typically 4000-400 cm-1) a graph could be constructed. By examining the graph of the information about the substance could be obtained. For the analysis, the OrigiPro programme was used to enter the data obtained by the spectrometer and create the corresponding graph in the range of 4000 cm-1 to 550 cm-1 and percentage transmittance, with which the functional groups adhered to the graphene plate could be characterised. The study was classified for analysis in ethanol and dimethylformamide with sonication times of 2h, 5h and 7h respectively. It was possible to characterize the functional groups present in the graphene suspensions were identified: aliphatic compounds, amine hydrohalides, carbonyl compounds, chlorhydrates, carboxylic acids, aromatic amines, alcohols, peroxides and phenols, which are characteristic of molecular interactions resulting from vibrations and elongations within the material. It is recommended to give continuity to the study of graphene, which today is still a timely topic of study that will open doors to new technology and new tools of fundamental support in research.