▎ 摘　　要

NOVELTY - A preparation of high-efficiency three-dimensional layered double hydroxide/graphene composite photocatalyst, involves uniformly dispersing graphite oxide in a solvent, adding a mixed salt solution of nickel, aluminum and iron and stirring, adding urea, stirring, and carrying out reaction. USE - Preparation of three-dimensional layered double hydroxide/graphene composite photocatalyst. ADVANTAGE - The highly-efficient three-dimensional layered double hydroxide/graphene composite photocatalyst can be prepared. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a three-dimensional layered double hydroxide/graphene composite photocatalyst comprises a nanosheet of layered double hydroxide that is grown vertically in the sheet graphene. A three-dimensional structure is formed. The mass ratio of the layered double metal hydroxide to the graphene is 100:5-100:35, and the nanosheet size is 100-150 nm.