INTERACTION OF HEXAMETHYLENEDIAMINE WITH ELECTROCHEMICALLY SYNTHESIZED GRAPHENE OXIDE
Brudnik S.V. Yakovlev A.V. Alferov A.A. Bekeshev A.Z. Yakovleva E.V. Nevernaya O.G. Mostovoy A.S. Tseluykin V.N.
2023Ivanovo State University of Chemistry and Technology
ChemChemTech
2023#66Issue 863 - 69 pp.
Multilayer graphene oxide (GO) was obtained by electrochemical oxidation of dispersed graphite in sulfuric acid and modified by chemical interaction with hexamethylenediamine (HMDA). The interaction of graphene oxide with hexamethylenediamine proceeds by the mechanism of nucleophilic substitution between the amino group of HMDA and epoxy groups -C-O-C-OG. Ac-cording to the results of scanning electron microscopy, the structure of HMDA-GO particles is represented by randomly distributed particles, in contrast to agglomerated clusters of multilayer GO particles. When modified with hexamethylenediamine, the multilayer graphene oxide is par-tially reduced and the deformation of the surface of carbon particles increases. The IR spectrum of GO shows peaks corresponding to vibrations of hydroxyl groups, also located between graphene layers, a peak of the C=O group, a peak corresponding to the sp2 hybridization of C=C in the gra-phene structure, a band of bending vibrations of the bonds of epoxy groups and -COOH groups. In the IR spectrum of HMDA-GO there is a peak at 1534 cm-1 and 1248 cm-1 corresponding to the bending vibrations of the C-N fragment and a broad peak of bending vibrations at 1100 cm-1 (C-N stretching). The X-ray diffraction pattern of GO shows a signal with a peak maximum at 20 = 11.86° corresponding to the diffraction index of the (001) plane of graphene oxide. The re-flection at 20 = 26.12° corresponds to the (002) graphite phase; however, the graphene oxide (001) phase peak is absent in the HMDA-GO diffraction pattern. In the Raman spectrum of GO, there is a D - band at 1355 cm-1, which characterizes the defectiveness of the structure. G is a band that describes vibrations of the sp2 system of carbon bonds (1610 cm-1). An increase in the intensity of the D band compared to the G band indicates an increase in the amount of the disordered phase in GO. The intensity ratio ID/IG shows a measure of disorder in the structure, so for GO ID/IG = 0.87. The Raman spectrum of HMDA-GO shows a shift ofpeaks compared to GO, there is a D band with a peak maximum of ~1348 cm-1 and a G band with a maximum of 1588 cm-1. The G band of the HMDA-GO is shifted towards lower wavenumbers, which confirms the presence of defects in the graphene layers. Band intensity ratio ID/IG is 1.35.
electrochemical synthesis , graphene oxide , hexamethylenediamine , modification
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Department of Chemistry and Chemical Technology of Materials, Yu.A. Gagarin Saratov State Technical Uni-versity, Politekhnicheskaya st., 77, Saratov, 410054, Russian Federation
Department of Physics, Aktobe Regional University named after K. Zhubanov, Aliya Moldagulova ave., 34, Aktobe, 030000, Kazakhstan
Department of Ecology and Technosphere Safety, Yu.A. Gagarin Saratov State Technical University, Politekhnicheskaya st., 77, Saratov, 410054, Russian Federation
Department of Natural and Mathematical Sciences, Engels Institute of Technology (branch) of Yu.A. Gagarin Saratov State Technical University, Svobody sqr., 17, Engels, Saratov reg., 413100, Russian Federation
Department of Technology and Equipment for Chemical, Oil and Gas and Food Industries, Engels Institute of Technology (branch) of Yu.A. Gagarin Saratov State Technical University, Svobody sqr., 17, Engels, Saratov reg., 413100, Russian Federation
Department of Chemistry and Chemical Technology of Materials
Department of Physics
Department of Ecology and Technosphere Safety
Department of Natural and Mathematical Sciences
Department of Technology and Equipment for Chemical
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