▎ 摘　　要

NOVELTY - Composite photocatalyst, where the composite photocatalyst is zinc ferrites/cerium oxide/reduced graphene oxide (ZnFe2O4/CeO2/RGO20). USE - Used as composite photocatalyst. ADVANTAGE - The photocatalyst has excellent anti-biodegradation effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite photocatalyst, comprising (a) grinding and mixing zinc nitrate, iron nitrate, cerium nitrate, and citric acid uniformly, (b) calcining uniformly mixed zinc nitrate, ferric nitrate, cerium nitrate, and citric acid to prepare precursors, (c) dispersing graphite oxide in a solvent uniformly to obtain a graphene oxide solution, (d) ultrasonically dispersing the prepared graphene oxide solution in a solvent, adding the precursor, and stirring and mixing the solution uniformly, and (e) adjusting the pH of the solution to 11 for a period of time, heating the solution, filtering the heated solution and washing, and drying.