Metal organic framework composite material and preparation method thereof

The invention discloses a metal organic framework composite material and a preparation method thereof. The composite material is a core-shell structure CuBHT@CuBTC formed by CuBHT and CuBTC. The preparation method comprises the following steps of 1, dropwise adding a trimesic acid solution into a mixed solution of copper nitrate trihydrate and polyvinylpyrrolidone under stirring, standing, precipitating, centrifugally separating, washing and drying to obtain CuBTC powder, 2, weighing the obtained CuBTC powder, grinding, adding a solvent, and carrying out ultrasonic dispersion to obtain a CuBTC dispersion liquid, and 3, adding hexamercaptobenzene into the CuBTC dispersion liquid for in-situ reaction, carrying out centrifugal separation, washing the precipitate, and drying to obtain CuBHT@CuBTC. The CuBHT@CuBTC composite material with the core-shell structure is successfully synthesized, and the conductivity reaches 1S/cm or above and is improved by 9 orders of magnitude compared with the conductivity of pure c