Preparation method of WO3/ZnWO4 composite micro-nano fiber and product of WO3/ZnWO4 composite micro-nano fiber

The invention discloses a preparation method of WO3/ZnWO4 composite micro-nano fiber. The preparation method comprises the following steps: firstly, preparing Zif-8 from zinc salt and dimethyl imidazole which serve as a raw material; then adding polyethylene glycol 200 and formamide to prepare a Tris-HCl solution of the Zif-8; dissolving tungstic acid in ammonia water, so as to obtain a solution; slowly dropwise adding the two solutions into a polyvinylpyrrolidone (PVP) solution, so as to obtain a precursor spinning solution, and performing electrostatic spinning and thermal treatment, so as to obtain a final product. According to the WO3/ZnWO4 composite micro-nano fiber produced through the preparation method, a fiber main body is formed by compounding WO3 and ZnWO4 nano particles, and WO3 heterogeneous phase particles are generated on the surface. A metal organic framework material (Zif-8) is introduced into a synthesis process of the WO3 fiber, so that the preparation process is simple and convenient, high