▎ 摘　　要

NOVELTY - Graphene/silver phosphate composite visible light photocatalyst comprises graphene and silver phosphate, in which silver phosphate particles are wrapped by layered graphene and has particle size of 100-400 nm. The photocatalyst has excellent photocatalytic degradation effect to organic dye rhodamine B and methylene blue under stimulation of visible light. USE - Graphene/silver phosphate composite visible light photocatalyst. ADVANTAGE - The photocatalyst has wide source of raw materials, simple preparation procedure, controllable structure, and has regular morphology. It has efficient degradation effect to certain concentration of organic dye rhodamine B and methylene blue under irradiation of visible light. DETAILED DESCRIPTION - Graphene/silver phosphate composite visible light photocatalyst comprises graphene and silver phosphate, in which silver phosphate particles are wrapped by layered graphene and has particle size of 100-400 nm. The photocatalyst has excellent photocatalytic degradation effect to organic dye rhodamine B and methylene blue under stimulation of visible light, such that for rhodamine B and methylene blue having concentration of 1x 105 mol/l, degradation rate of photocatalyst to rhodamine B after being irradiated by visible light for 30 seconds is 83%, for 1 minute is 94%, and for 4 minutes is 98%; and degradation rate to methylene blue after being irradiated by visible light for 30 seconds is 94%, 4 minutes is 98%; and for rhodamine B and methylene blue having concentration of 5x 105 mol/l, degradation rate of photocatalyst to rhodamine B after being irradiated by visible light for 2 minutes is 25%, for 10 minutes is 94%, for 2 minutes is 75%, and for 6 minutes is 98%. An INDEPENDENT CLAIM is included for preparation of graphene/silver phosphate composite visible light photocatalyst by uniformly stirring and mixing graphene oxide and silver nitrate to obtain mixed precursor solution A; aging precursor solution A for 12-24 hours; reacting precursor solution A with disodium hydrogen phosphate or sodium dihydrogen phosphate to obtain graphene oxide/silver phosphate; and subjecting into hydrothermal reaction for 12-24 hours at 140-200 degrees C in stainless steel hydrothermal reactor sealed with PTFE inner container.