▎ 摘　　要

NOVELTY - Preparing graphene-inorganic nanoparticle composite fiber comprises (i) dissolving graphene oxide solution, inorganic nanoparticles and water-soluble reducing agent, and injecting into tubular reactor, (ii) continuous injecting of step (i) mixture, heating the tubular reactor to obtain aqueous graphene-inorganic nanoparticle composite gel, where heating at a temperature of 60-95 degrees C, and (iii) withdrawing aqueous graphene-inorganic nanoparticle composite gel obtained in step (ii), and then drying to obtain final product. USE - The method is useful for preparing graphene-inorganic nanoparticle composite fiber (claimed). ADVANTAGE - The method has simple preparation processes, mild reaction conditions, and excellent in energy. DETAILED DESCRIPTION - Preparing graphene-inorganic nanoparticle composite fiber comprises (i) dissolving graphene oxide solution, inorganic nanoparticles and water-soluble reducing agent, and injecting into tubular reactor, where the water reducing agent is ascorbic acid, sodium ascorbate, sodium citrate, sodium iodide, sodium bromide, sodium bisulfite, sodium sulfide, ethylenediamine, p- phenylenediamine and/or hydroquinone, molar ratio between graphene oxide solution and inorganic nanoparticles is 1:0.01-1:20, and the particle size of inorganic nanoparticles is 1-500 nm, (ii) continuous injecting of step (i) mixture, heating the tubular reactor to obtain aqueous graphene-inorganic nanoparticle composite gel, where heating at a temperature of 60-95 degrees C, and (iii) withdrawing aqueous graphene-inorganic nanoparticle composite gel obtained in step (ii), and then drying to obtain final product. An INDEPENDENT CLAIM is also included for graphene-inorganic nanoparticle composite fiber is obtained by above method.