▎ 摘　　要

NOVELTY - A three-dimensional tungsten oxide material composed of nanofibers is composed of microspheres interwoven with countless nanofibers, and a three-dimensional communicated porous network is formed among the microspheres. The length of each nanofibers is 0.2-2 μm, the diameter of each nanofibers is 10-60 nm, and lamellar reduced graphene oxide is compounded on each nanofibers. The microspheres have diameter of 0.5-3 μm, micropores with the diameter of 1-2 nm, mesopores with the diameter of 2-50nm, macropores with the diameter of 50-100 nm, holes with the diameter of 200-500 nm and slit channels with the length of 3-7 μm and width of 0.5-2.5 μm are formed among the microspheres. USE - Three-dimensional tungsten oxide material composed of nanofibers used in gas sensing, photochromic devices, batteries, catalysts, and n-type semiconductor material with narrow forbidden bandwidth. ADVANTAGE - The three-dimensional tungsten oxide material is prepared by simple solvent thermal method. The material has a composite microstructure, hole structure, active site is more, and improves the application performance. The preparation method is simple, the material has several composite microstructures, the hole structure is developed, the pore structure is not developed and the specific surface area is small. The process of self-assembling the material in the preparation process is simple and the material is self-assembled. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of three-dimensional tungsten oxide material composed of nanofibers, which involves (s1) adding tungstic acid and graphene oxide in glycerol aqueous solution, and uniformly stirring to form a mixed solution, (s2) pouring the mixed solution in lining of high-pressure reaction kettle provided with stirring device, carrying out stirring under the conditions of heating and heat-preserving, and performing mixed solution to dynamic solvothermal reaction, (s3) taking out the dynamic solvothermal reaction product from the high-pressure reaction kettle, repeatedly washing with deionized water and absolute ethyl alcohol, and centrifuging, and (s4) fully drying the product obtained after the centrifugation. The mass ratio of the graphene oxide to tungstic acid is (0.01-0.02):1. The mass ratio of the glycerol aqueous solution to mixed solution is (0.7-0.8):1.