▎ 摘　　要

NOVELTY - Silver iodide/graphene oxide/ultrathin graphitic carbon nitride nanosheet (AgI/GO/UCN) photocatalyst composed of silver iodide nanoparticles, graphene oxide sheets and ultrathin graphitic carbon nitride nanosheets in a mass ratio of 0.1-0.5:0.01-0.05:1, is claimed. The thickness of the ultrathin graphitic carbon nitride nanosheets is 4-7 nm. USE - The photocatalyst is useful in degrading organic pollutants (claimed). ADVANTAGE - The photocatalyst: has high photocatalytic efficiency and excellent organic pollutant degradation effect; has photocatalytic degradation rate of 98.42% to rhodamine B dye wastewater; and ensures rhodamine B degradation rate of 0.06303 min-1under the irradiation of visible light. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of the AgI/GO/UCN photocatalyst, comprising (1) dispersing GO sheets in solvent and ultrasonically treating to obtain GO dispersion, and dispersing ultrathin graphitic carbon nitride (g-C3N4) nanosheets in solvent to obtain UCN suspension, (2) adding GO dispersion dropwise to UCN suspension under stirring conditions, and ultrasonically treating to obtain precipitate i.e. GO/ultrathin g-C3N4binary photocatalyst, and then dispersing in solvent to obtain GO/UCN suspension, and (3) adding silver nitrate solution dropwise to GO/UCN suspension under continuous stirring condition, stirring in dark for 10-60 minutes, then adding potassium iodide solution dropwise, and stirring for 1-4 hours in dark to obtain final product as precipitate.