▎ 摘　　要

NOVELTY - An antibacterial silica composite material comprises silica, graphene composite and metal ion carrier with silver, zinc, copper or titanium. USE - Antibacterial silica composite material. ADVANTAGE - The method is simple, low-cost, environment-friendly and suitable for industrialization. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of antibacterial silica composite material comprising taking 0.05-0.10 mol/L silver (I) solution, zinc (II) solution and copper (II) solution, adding 1.00-5.00 mol/L titanium (IV) solution, obtaining antibacterial ion solution, taking low pH value oxidized graphene solution, adding purified water, adjusting mass concentration to 0.01-2% and pH value to 2-5, stirring, adding silicate and sodium hydroxide, adding antibacterial ion solution or two antibacterial ion solution mixed solution, stirring, adding sulfuric acid-containing graphene oxide solution, and sulfuric acid or hydrochloric acid, adjusting pH value to 4-7, stirring, ultrasonicating for 0.3-2 hours, drying, filtering, centrifuging, and calcining.