Preparation method of zinc oxide with core-shell structure and obtained zinc oxide

The invention provides a preparation method of zinc oxide with a core-shell structure and zinc oxide obtained by the preparation method. The preparation method comprises the following steps: 1) taking a core material, adding a dispersing agent and sepiolite, stirring the dispersing agent which is a composite dispersing agent composed of stearic acid, CTAB, SDBS and KH550 according to a mass ratio of (1-2): (0.1-0.3): (0.05-0.10): (0.5-1.0) to obtain a primary mixture; 2) taking a zinc-containing solution, adding the primary mixture into the zinc-containing solution, and stirring to obtain a reaction solution; 3) adding an alkaline solution into the reaction solution, stirring for reaction, and removing water to obtain a precipitate; and 4) taking the precipitate, drying and calcining to obtain the core-shell structure zinc oxide. The core material is uniformly dispersed and suspended in the zinc-containing solution under the action of the dispersing agent and the sepiolite, insoluble substances generated in s