▎ 摘　　要

NOVELTY - Porous graphene nano material preparation involves dispersing graphene oxide ultrasonically in water to prepare graphene oxide suspension, and then mixing with near saturated zinc nitrate solution. The ultrasonication is continued to make mixture uniform. The graphene oxide and zinc nitrate are trapped on the filter paper, where the filter paper is loaded with graphene oxide and zinc nitrate. The obtained product is washed with hydrochloric acid to remove zinc oxide. The hydrochloric acid is also washed with distilled water. The product is dried to obtain the porous graphene nano material. USE - Method for preparing porous graphene nano material. ADVANTAGE - The method prepares porous graphene nano material in a simple, cost-effective and eco-friendly manner with controllable pore size and greatly reduced improved utilization efficiency. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the characterization diagram of the prepared porous graphene nanomaterial. (Drawing includes non-English language text).