▎ 摘　　要

NOVELTY - Preparing mesoporous metal oxide-graphene composite nanosheet comprises taking a mixed aqueous solution of graphene oxide solution, metal salt and sodium nitrate as raw materials, mixing and stirring uniformly at room temperature and normal pressure, freeze-drying, annealing the obtained solid material under air conditions, washing with water, and drying. USE - Preparation method of mesoporous metal oxide-graphene composite nanosheet. ADVANTAGE - The method is simple, time-saving, low cost, high safety coefficient, green and environment-friendly, has good shape, and good performance, has simple operation, low device requirement, good repeatability and low cost and easy to characteristics, does not relate to organic reagent and strong acid and strong alkali reagent, has low danger coefficient and is green and eco-friendly. DESCRIPTION OF DRAWING(S) - The drawing shows a capacitance graph of a preparation method of mesoporous metal oxide-graphene composite nanosheet. 1Prepared graphene solution 10Sodium nitrate 15Sodium nitrate