▎ 摘　　要

NOVELTY - Preparing N-doped graphene-yttria composite catalyst involves adding cerium (IV) oxide precursor, carbon source, and a nitrogen source to the water, stirring uniformly, and drying. The dried solid is ground, it is calcined under nitrogen protection and cooled to obtain final product. USE - Method for preparing N-doped graphene-yttria composite catalyst used in treatment of acid refractory wastewater (claimed). ADVANTAGE - The method enables to prepare N-doped graphene-yttria composite catalyst which effectively catalyzing ozone oxidation degrading organic pollutant under acidic or strongly acidic condition. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a methof of using N-doped graphene-yttria composite catalyst, which involves subjecting acid refractory wastewater containing organic pollutants The N-doped graphene-yttria composite catalyst and H2O2 were added and subjected hydrogen peroxide to catalytic oxidation degradation by ozone.