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N. Sonochemical preparation and subsequent immobilization of oxygen free graphene sheets at n-dimethyloctylamine-water interface

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Document pages: 11 pages

Abstract: This paper introduces the synthesis of oxygen-free graphene sheets and their immobilization at the oil-water interface. Graphene flakes were prepared by stripping and synthesizing graphite powder under ultrasonic irradiation in aqueous organic medium. N. The liquid medium is n-dimethyloctylamine (dmoa -) water emulsion with pH value of 3. The graphene nano suspension was separated by precipitation and decanted according to weight. The structure and layers of graphene nanoparticles were characterized by transmission electron microscopy (TEM), electron diffraction, high resolution transmission electron microscopy (HRTEM), Raman spectroscopy and electron energy loss spectroscopy (EELS). It was found that dmoa water mixture was used as liquid medium in Ultranic treatment of synthetic graphite leads to the formation of oxygen-free 1-2-layer graphene sheets attached to the DMOA-aqua interface. The proposed method differs from known ones by using a small amount of more environmentally friendly organic substances. It allows to obtain large quantities of oxygen-free graphene, and finally unconverted graphite can be directed for reuse. The proposed method allows to obtain both 2D graphene sheets with micron linear dimensions and 3D packages with a high content of defects. Both these species are in demand in areas related to the development of new materials with unique electrophysical properties.

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