▎ 摘　　要

NOVELTY - Preparing porous graphene-supported cerium nanocomposite antibacterial agent comprises e.g. (i) under ice-water bath and stirring conditions, taking phosphorus pentoxide and potassium persulfate, heating, reacting under stirring, cooling and diluting, filtering and drying, (ii) taking potassium permanganate, intercalation agent and pre-oxidized graphite, diluting, filtering, drying, calcining and cooling, (iii) taking the porous graphene oxide solution, heating and concentrating, (iv) taking titanium dioxide, tert-butanol, stirring, immersing, freeze-drying, calcining and cooling. USE - The method is useful for preparing porous graphene-supported cerium nanocomposite antibacterial agent (claimed). ADVANTAGE - The method: produces product has large specific surface area and good load effect of antibacterial agent. DETAILED DESCRIPTION - Preparing porous graphene-supported cerium nanocomposite antibacterial agent comprises (i) under ice-water bath and stirring conditions, taking 10 pts. wt. phosphorus pentoxide and 10 pts. wt. potassium persulfate, slowly adding into a container containing 25-30 pts. wt. 98% sulfuric acid, heating the container at 82-86 degrees C, slowly adding 20 pts. wt. natural flake graphite, reacting under stirring for 12 hours, cooling the reaction and diluting with water, filtering and drying to obtain pre-oxidized graphite, (ii) taking 25-30 pts. wt. potassium permanganate, 10-15 pts. wt. intercalation agent and 10 pts. wt. pre-oxidized graphite, adding slowly 300 pts. wt. 98% sulfuric acid, reacting at 35 degrees C for 3 hours, adding 5 pts. wt. 20-30% hydrogen peroxide, reacting slowly, diluting with deionized water, filtering and drying, adding the product into a concentration of 1-1.5 mol/l potassium hydroxide solution, soaking for 6-8 hours, filtering and calcining at 800 degrees C for 3-6 hours, cooling,adding deionized water and ultrasonic shocking for 3 hours, filtering through 100 mu m pore filter to obtain porous graphene oxide solution, (iii) taking the porous graphene oxide solution, heating and concentrating to a concentration of 5-10 g/l, adding 5-8 pts. wt. cerium nitrate and 20-25 pts. wt. reducing agent into a 100 pts. wt. concentrated solution, stirring at 400-800 revolution/minutes (rpm) for 30 minutes to obtain reaction solution, adding the reaction solution into the hydrothermal reactor, reacting at 190-210 degrees C for 4-6 hours, cooling to obtain three-dimensional porous graphene composite material, (iv) taking 10-15 pts. wt. titanium dioxide, 100 pts. wt. tert-butanol, stirring to obtain replacement liquid, taking three-dimensional porous graphene composite obtained in the step (iii), repeatedly soaking in tert-butanol solution for 5-10 times, immersing the three-dimensional porous graphene composite material in the replacement fluid, taken out and freeze-drying, finally placing in a calciner under argon protection, calcining at 550-600 degrees C for 5-10 hours, cooling the furnace to obtain porous graphene loading cerium nano-composite antibacterial agent.