▎ 摘　　要

The manuscript describes a physical method for the fabrication of mesoporous graphene-based three-dimensional adsorbents. The method employs a commercially available graphene and does not require its oxidation to graphene oxide. In situ exfoliation of graphene planes was achieved by wet grinding of stacked graphene planes in the presence of nano-sized CaCO3 powder. The method allowed for an increase of the specific surface area of graphene from 34 (commercial sample) to 148 m(2)g(-1). Exfoliated graphene planes, after fixation, form a three-dimensional durable mesoporous structure. The average pore size corresponds to the diameter of CaCO3 particles (15-40 nm).