Lyophilization of water suspension of graphene oxide and graphene oxide–C60 and of their reduced products.

Eva Zemanova; Karel Klouda; Eliska Brabencova; Stanislav Bradka; Karel Lach

Volume : IV, Issue : X, October - 2015

Lyophilization of water suspension of graphene oxide and graphene oxide–C60 and of their reduced products.

Eva Zemanova, Karel Klouda, Eliska Brabencova, Stanislav Bradka, Karel Lach

Abstract :

Oxidization of graphene and joint oxidization of graphene and fullerene C60 in various weight ratios was used to produce water suspensions that allow preparation of foils with various morphologies and can be further treated, e.g. by fluorination, omination, embedding of catalytic–active metals, preparation of composite materials with other polymers or nanofibers and also as lamellar fibers prepared by freeze drying without any additional components. In this work we performed lyophilization of water suspensions of graphene oxide – fullerene C60 in order to obtain products with new morphology ( fiber formation) and lyophilization after conversion (reduction) of oxidized suspensions. Methods employed to characterize the resulting products included microscopy, SEM imaging, FT IR, TGA and DSC analysis.