▎ 摘　　要

NOVELTY - Graphene and vanadate composite nano-fiber photocatalyst comprises two components including graphene and vanadate according to a proportion that 10-30 mg of graphene is used when 1 mmol of vanadate is used. USE - Used as graphene and vanadate composite nano-fiber photocatalyst. ADVANTAGE - The nano-fiber photocatalyst: utilizes graphene and vanadate composite fibers having rich porous layer structures and narrower band gap width, very good visible light catalytic degradation capacity to a contaminant ofloxacin in water, and can be quickly separated from a solution through precipitating. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the graphene and vanadate composite nano-fiber photocatalyst using the electrostatic spinning, and spinning solution including anhydrous system of polyethylene pyrrolidone and ethanol, comprising (i) taking rare earth metal nitrate, polyvinyl pyrrolidone, absolute ethyl alcohol and graphene powder according to ratio of 1 mmol:0.5-1 g:5 ml:10-30 mg, dissolving the rare earth metal nitrate and polyvinylpyrrolidone in absolute ethyl alcohol under stirring state, then immersing the graphene powder, fully and uniformly stirring, and ultrasonically dispersing for 30 minutes to obtain solution A; (ii) taking vanadyl acetylacetonate and absolute ethyl alcohol according to the ratio of 1 mmol:5 ml, and dissolving vanadyl acetylacetonate in absolute ethyl alcohol to obtain solution B; (iii) dropwise adding the solution B in the solution A, fully stirring for 4-8 hours, and preparing a spinning solution; (iv) performing electrostatic spinning on the spinning solution into a spun silk to obtain composite nanofiber felt; and (v) aging the composite nanofiber felt under air for 6-24 hours, then calcining at 500-600 degrees C under air atmosphere for 2-6 hours to remove polyvinyl pyrrolidone.