▎ 摘　　要

NOVELTY - Bismuth-based photothermal conversion nanofiber material comprises ferric oxide-grapheme sulfide nanoparticle as photothermal medium main body, and polyvinylpyrrolidone as a substrate, where the preparation of graphene oxide-bismuth sulfide nanoparticles using hydrothermal synthesis method includes taking ferric oxide grapheme sulfide nanoparticle as photothermal medium main body, taking polyvinylpyrrolidone as substrate, carrying out electrostatic spinning technology to prepare (oxide- graphene-bismuth)-polyvinyl pyrrolidone complex nano-fiber, then calcining the complex nano fiber to obtain the oxidized graphene bismuth-sulfide ceramic nano- fiber, then using dopamine and polyethyleneimine to modify the graphene oxide-bismuth sulfide ceramic nano-fiber by dipping method to obtain polydopamine-polyethyleneimine-graphene oxide-bismuth sulfide composite nanofiber, which is bismuth-base photothermal conversion nano fiber material. USE - The bismuth-based photothermal conversion nanofiber material is useful for seawater desalination, wastewater treatment, and rapid evaporation of solvents. ADVANTAGE - The bismuth-based photothermal conversion nanofiber material has high absorption rate and high evaporation rate for sunlight in the whole wavelength range, and has wide application value. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the preparation of the bismuth-based photothermal conversion nanofiber material.