▎ 摘　　要

NOVELTY - A graphene/silver phosphate/titanium dioxide functional composite material is obtained by coating titanium dioxide nanoparticles having average particle size of 8-12 nm on surface of silver phosphate particles, and depositing silver phosphate particles on graphene sheet surface. The composite material is observed under light at concentration of 25 ppm of rhodamine B solution, photocatalytic degradation rate of composite material is more than 80%, and the material inhibits and kills effect on colon bacillus, staphylococcus aureus, bacillus pumilus and Pseudomonas aeruginosa. USE - Graphene/silver phosphate/titanium dioxide functional composite material is used in photocatalysis technology, biological antibiosis and water pollution control. ADVANTAGE - The composite material quickly enables to degrade organic pollutants with predetermined concentration when irradiated by visible light, and has broad-spectrum and efficient bactericidal activity for bacteria. DETAILED DESCRIPTION - A graphene/silver phosphate/titanium dioxide functional composite material is obtained by coating titanium dioxide nanoparticles having average particle size of 8-12 nm on the surface of silver phosphate particles having size of 360-480 nm, and depositing silver phosphate particles on graphene sheet surface. The composite material is observed under light at concentration of 25 ppm of rhodamine B solution, photocatalytic degradation rate of composite material is more than 80%, and the composite material inhibits and kills effect on colon bacillus, staphylococcus aureus, bacillus pumilus and Pseudomonas aeruginosa. The diameter of the inhibition of the test bacteria is more than 15 mm, minimum inhibitory concentration of test strain is less than 50 ppm, and minimum sterilizing concentration is less than 100 ppm. An INDEPENDENT CLAIM is included for manufacture of graphene/silver phosphate/titanium dioxide functional composite material, which involves ultrasonically treating oxidized graphene in water to obtain oxidized graphene dispersion liquid, dissolving silver phosphate in deionized water, adding deionized water with silver phosphate into oxidized graphene dispersion liquid under stirring, obtaining mixed solution (A), ultrasonically dispersing P25 in deionized water to prepare dispersion liquid, dripping P25 dispersion liquid into mixed solution (A) under magnetic stirring, obtaining mixed precursor solution (B), dripping phosphate solution into the mixed precursor solution (B), continuing stirring, shifting mixed precursor solution (B) into a hydrothermal reaction kettle, reacting, cooling the product to the room temperature, centrifuging the product, washing the product and performing vacuum drying. The concentration of oxidized graphene is 0.02-0.1 wt.%, the concentration of P25 is 0.2-0.8 wt.%, and the concentration of silver phosphate is 1-2 wt.%.