INTERACTION BETWEEN GRAPGITE OXIDE NANOPARTICLES AND FUNCTIONALIZED MOLECULES: A WAY TO PRODUCE AND/OR STABILIZE GRAPHENE COATINGS

摘要

Graphite oxide (GO) is an accepted precursor to produce graphene membranes and coatings. GO can be restored to graphite either by physical processing (microwave irradiation, laser or thermal treatment), or by chemical way with reducing agents (ascorbic acid, hydrazine, etc.). In the case of a thin coating of GO, graphene layers are produced. The process of graphene formation from GO is crucial for the quality of new-formed graphene layer. Commonly, the graphene sheets formed after physical or chemical treatment, are stacked more or less disorderly, resulting in significant decrease in quality of the coatings. To solve this problem we used the additives of organic molecules, namely, Congo red (CR), containing reactive functional groups that can interact wim the functional groups of GO nanoparticles and fuse them together. Structure of CR depends on the pH of solution (Fig. 1).