▎ 摘　　要

Stable aqueous colloidal solutions of graphene oxide stabilized with sodium polyphosphate were obtained. During irradiation of the colloids the oxygen-containing groups of the graphene oxide are eliminated, and the aromatic graphite-like regions in its composition are expanded. This is accompanied by decrease in the energy of the electronic transitions E-bg in such sp2-hybridized fragments. Photoreduction of the colloidal particles of graphene oxide leads to changes in their hydrodynamic size, resulting from oee < oee < interactions between the aromatic fragments in the particles. It was shown that the E-bg value can be varied purposefully in the range of 0.5-1.9 eV by varying the experimental conditions.