Synthesis of graphene-based nanostructures by the combined method comprising sol-gel and sonochemistry techniques

• Published in: Diamond and related materials Vol. 85; pp. 23 - 36
• Main Authors: Trusova, Elena A., Kotsareva, Klara V., Kirichenko, Alex N., Abramchuk, Sergey S., Ashmarin, Artem A., Perezhogin, Igor A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2018; Elsevier BV
• Subjects: Carbon; Cobalt oxides; Crystallites; Diffraction; Energy distribution; Fourier transforms; Graphene; Graphene-ceramics composites; Infrared spectroscopy; Molybdenum oxides; Molybdenum trioxide; Morphology; Nanocomposites; Nanoparticles; Nanostructured materials; Nickel oxides; Organic chemistry; Sol-gel processes; Sol-gel technique; Sols; Sonochemistry; Spectrum analysis; Stabilization; Synthesis; Texturing; Transmission electron microscopy; Tungsten oxides; Ultradispersed metal oxide powder; X-ray diffraction; Ultradispersed metal oxide powder; Sol-gel technique; Sonochemistry; Graphene; Graphene-ceramics composites
• ISSN: 0925-9635; 1879-0062
• DOI: 10.1016/j.diamond.2018.03.020

Nanocomposites based on graphene and Co3O4, MoO3, NiO and WO3 have been synthesized by a combination of sol-gel and sonochemical techniques. N,N-Dimethyloctylamine was used for the formation and stabilization of metal-containing sols and for stabilization of graphene suspension. The structure, morphology and composition of graphene-based nanocomposites were investigated by means of transmission electron microscopy, X-ray diffraction, Raman and FT-IR spectroscopy. It has been shown that the proposed method allows obtaining the hybrid nanoparticles with 10 to 200 nm size consisting of Co3O4, MoO3, NiO or WO3 crystallites coated with the graphene layers. This method enables preparing chemically homogeneous composite nanopowders for the production of high performance (photo)catalysts and fine-grained ceramics for the energy sector with uniform distribution of components within a volume. It has beens proven experimentally that graphene sheets are involved in the formation of hybrid nanoparticles based on metal oxides as structuring and texturing agents. These results show promise in the synthesis and fabrication of well-defined graphene-based functional materials, including graphene-ceramic hybrids, with a broad scope of applications. [Display omitted] •Synthesis of the hybrid nanostructures based on graphene and Co3O4, MoO3, NiO and WO3•Method of synthesis – combination of sol-gel and sonochemical techniques•N,N-Dimethyloctylamine was used for stabilization of sols and graphene suspension.•Graphene is structuring and texturing agent in the synthesis of hybryd structures.