▎ 摘　　要

NOVELTY - Double-shell nanocomposite photocatalyst comprises a metal oxide nanoflower structures; a silver oxide nanoparticle layer positioned on the metal oxide nanoflower structure and surrounding at least a portion of the metal oxide nanoflower structure; and a graphene oxide layer positioned on the silver oxide nanoparticle layer and surrounding at least a portion of the silver oxide nanoparticle layer. USE - The photocatalyst is useful for decomposing organic dyes and volatile organic compounds (claimed) in various industrial fields. ADVANTAGE - The photocatalyst has improved band bending by heterojunction and electron hole separation efficiency, and improved simultaneously efficiency and stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing double-shell nanocomposite photocatalyst, comprising (a) preparing metal oxide nanoflower structure, (b) forming silver oxide nanoparticle layer on the metal oxide nanoflower structure, and (c) forming graphene oxide layer on the silver oxide nanoparticle layer; DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the method for producing double-shell nanocomposite photocatalyst (Drawing includes non-English language text).