Ceramic-based nanosheet/nanowire composite aerogel and preparation method thereof

The invention relates to a ceramic-based nanosheet/nanowire composite aerogel and a preparation method thereof. The composite aerogel is of a honeycomb mesh array structure formed by interpenetrating and staggering nanowires; the ceramic-based nanosheets are formed by in-situ induction at the surface confinement of the nanowires, are vertical to the nanowires and are uniformly distributed on the outer surfaces of the nanowires; the ceramic-based nanosheet is in an ultrathin and highly wrinkled form; the surface confinement of the nanowire is an annular area within 2-100 nm from the position, containing metal ions, of the surface of the nanowire in the radial direction. Meshes of the ceramic-based nanosheet/nanowire composite aerogel are of a micropore/mesopore double-hole structure, the specific surface area is large, flowing of air molecules can be effectively prevented, and the composite aerogel has low heat conductivity; the shape and the size of the ceramic-based nanosheet/nanowire composite aerogel are e