Three-dimensional porous Ti3C2 film as well as preparation method and application thereof

The invention belongs to a preparation process of inorganic materials and functional materials, and discloses a three-dimensional porous Ti3C2 film and a preparation method and application thereof, the preparation method comprises the following steps: uniformly dispersing a doping source and Ti3C2 in a water solvent A, and then carrying out hydrothermal reaction at 110-130 DEG C to obtain a precursor material; the doping source is a vanadium source, or a nitrogen source and the vanadium source; uniformly dispersing the precursor material in a water solvent B to obtain a precursor solution; and then, after the precursor solution is filtered, freeze drying is carried out, and the three-dimensional porous Ti3C2 film is obtained. Rich active sites are provided through co-doping of vanadium and nitrogen, the interaction between metal ions and oxygen-containing functional groups on the surface can be optimized, the transmission speed of charges on the material surface is increased, and rich redox active sites are p