Preparation method of nano fibers with wide visible light absorption range

The invention provides a preparation method of nano fibers with a wide visible light absorption range. Bismuth nitrate pentahydrate, N, N-dimethylformamide, vanadyl acetylacetonate, polyvinylpyrrolidone, citric acid, glacial acetic acid and ethanol are taken as raw materials, and through steps of muffle furnace sintering, hydrogen plasma treatment and the like and by a high-voltage electrostatic forming technology, the prepared nano fibers consist of bismuth vanadate and amorphous bismuth, wherein the amorphous bismuth is supported on the bismuth vanadate; and the bismuth vanadate is about 95%-98% by mass, and the amorphous bismuth is 2%-5% by mass. The preparation method of the nano fibers with the wide visible light absorption range has the advantages that the raw materials are simple and easy to obtain, the whole experimental process is clear, the preparation method is convenient to operate, the large-scale production of the product can be easily realized, the product can be completely recycled in the usin