▎ 摘　　要

NOVELTY - A photocatalytic multifunctional graphene fiber material comprises raw materials comprising 10-25 wt.% polypropylene masterbatch comprising 4-16 wt.% nano-tungsten, 1-9 wt.% rare earth oxide, 9-24 wt.% promoter material, 0.1-20 wt.% graphene material, 50-84 wt.% polypropylene and remainder of additives, and 75-90 wt.% polypropylene chips. USE - Photocatalytic multifunctional graphene fiber material is used for removing organic pollutants in air, and reducing heavy metal inorganic ions. ADVANTAGE - The photocatalytic multifunctional graphene fiber material has large specific surface area and desired sterilization and bacteriostasis effects, and can fully contact with organic pollutants in the air to quickly and efficiently remove the organic pollutants in the air, and reduce heavy metal inorganic ions with high decomposition rate, and can be recycled. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of photocatalytic multifunctional graphene fiber material, which involves adding (i) 180-240 g tungstate to a container, adding enough water to dissolve, adding excess dilute acid, until yellow precipitates are formed, maintaining for 24-30 hours, washing and filtering the precipitates 3-5 times, and adding 15% ammonia to the precipitates, until the yellow precipitates are completely converted into a transparent colloid, adding (ii) 120-160 g rare earth oxide to a container, adding enough dilute nitric acid to dissolve completely, adding 50-80 g co-solvent and mixing, adding 200-1800 g graphene material, and stirring at room temperature for 0.4-0.6 hours to obtain a rare earth graphene nitrate mixed solution, adding (iii) the transparent colloid to the rare earth nitrate mixed solution, adding 1/4-1/3 of water used for dissolving tungstate in process (i), stirring at room temperature for 0.8-1.2 hours, adding dilute acid, until the pH value of the solution is 3-5, and maintaining for 4-5 hours to obtain a sol, adding (iv) 500-2000 g catalytic material to the sol, and stirring at 1000-3000 rpm for 2-4 hours to obtain a wet gel, drying (v) the wet gel at 100-110 degrees C, grinding into a powder, calcining the powder at 450-560 degrees C for 1.5-2.5 hours, grinding evenly, and ultrasonically-dispersing to obtain a photocatalytic multifunctional fiber material powder comprising rare earth doped nano-tungsten oxide with a particle size of 0.5-5 mu m, adding (vi) the photocatalytic multifunctional fiber material powder to the polypropylene matrix which is 3-4 times the mass of the photocatalytic multifunctional fiber material powder, adding 15-200 g dispersing agent, 20-280 g coupling agent and 10-100 g defoaming agent, mixing evenly, melting, kneading, extruding and pelletizing using a screw extruder at 180-220 degrees C to obtain polypropylene masterbatch, and adding (vii) the polypropylene masterbatch to polypropylene chips which is 3-9 times the mass of the photocatalytic multifunctional fiber material powder, mixing evenly, melting, kneading, extruding and pelletizing using a screw extruder, and performing melt-spinning and texturing.