▎ 摘　　要

NOVELTY - A silver (Ag)/titanium dioxide (TiO2)/graphene nano-composite photocatalyst comprises metal silver and nano titanium dioxide powder placed to two-dimensional layered graphene carrier material via photocatalytic oxidation-reduction method (P25). USE - Silver (Ag)/titanium dioxide (TiO2)/graphene nano-composite photocatalyst. ADVANTAGE - The preparation is simple, utilizes low cost reagent, is suitable for industrial production, and is green. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation of Ag/TiO2/graphene nano-composite photocatalyst comprising putting graphite oxide ultrasound scattered at reducing desulfurization solvent, adjusting concentration of graphite oxide (0.5-10 mg/mL), ultrasonic dispersing for 1-3 hours, putting silver nitrate into distilled water, adjusting concentration of silver nitrate solution of 0.01-0.1 g/L, obtaining graphite oxide dispersion, putting titanium oxide in mixed solution (P25), in ratio of Ag, graphite and titanium oxide of 0.01-0.5:0.01-0.5:1, transferring to photocatalytic reactor, processing photocatalytic reduction for 1 hour at simulative sunlight, vacuum device of filtering, using deionized water to wash, and vacuum drying to obtain Ag/Ti02/graphene nano-composite photocatalyst.