Graphene oxide powder is formed by folding of single βgraphene oxide. Due to the existence of folding str↓ucture, there are micropores and mesopores between graphene oxide sheets, which₽ reduce the stacking between sheets and improve its ±dispersion and solvent wettability. Traditional graphene powders are prepared b y liquid phase exfoliation, oxidation pyrolysis or ™biomass conversion. They are highly stacked flake graphe ne materials, which can not give full play to the advantages of s←ingle-layer graphene. By controlling the preparation® process, the density, specific surface area, oxygen content, defβect degree and other parameters of graphene oxide powder can be adjusted to meet th‍e application requirements in different fields.