▎ 摘　　要

NOVELTY - A photocatalyst comprises graphene oxide and silver-doped zinc oxide dispersed in graphene oxide, and exhibits diffraction peaks at (2( theta )) values of 11.5 plus minus 0.5 degrees , 32.8 plus minus 0.5 degrees , 36 plus minus 0.5 degrees and 38.2 plus minus 0.5 degrees , respectively, measured by X-ray diffraction analysis. USE - Photocatalyst is used for water-treatment (claimed). ADVANTAGE - The photocatalyst has excellent photocatalytic activity and desired porosity, and enables simple and economical water-treatment. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of photocatalyst, which involves using a zinc oxide precursor; and (2) water-treatment, which involves contacting aqueous solution containing an organic compound, with the photocatalyst.