TiO2/ZIF-8 nanocomposite with core-shell structure and preparation method of TiO2/ZIF-8 nanocomposite

The invention discloses a preparation method of a TiO2/ZIF-8 nanocomposite with a core-shell structure. The preparation method comprises the following steps: firstly, tetrabutyl titanate is added to an ethylene glycol solution and stirred uniformly, the mixture is added to anhydrous acetone, stirred quickly and left to stand, and TiO2 amorphous nano-beads are obtained through separation, washing and drying; the nano-beads are added to a tetramethylammonium hydroxide aqueous solution and react at 160-200 DEG C, and TiO2 nano-beads are obtained through separation, washing and drying; the prepared TiO2 nano-beads are added to a methanol solution of Zn(NO3)2*6H2O and are stirred, a methanol solution of 2-methylimidazole is then added, and the TiO2/ZIF-8 nanocomposite with the core-shell structure is obtained through separation, washing and drying. The preparation method has mild preparation conditions and simple process; the synthesized TiO2/ZIF-8 composite has uniform size and good dispersity and is expected to be applied to gas separation, photoelectric materials, photocatalytic materials and the like.