Silicon dioxide@ZIF-8 nano material for conveying active components and preparation method of nano material

The invention relates to a silicon dioxide@ZIF-8 nano material and a preparation method thereof. The silicon dioxide@ZIF-8 nano material is prepared by the following steps: preparing silicon dioxide particles by using silicon dioxide according to a Stober method, and then coating the surfaces of the silicon dioxide particles with ZIF-8 doped with active components to prepare a silicon dioxide@ZIF-8 nano carrier with high stability. The preparation method comprises the following steps: (a) preparing the silicon dioxide particles: adding ethanol into a round-bottom flask, adding an ammonium hydroxide solution and deionized water under magnetic stirring, carrying out stirring for 0.5-1.5 hours, adding tetraethyl orthosilicate, stirring the mixture at a speed of 600-800 rpm for 10-14 hours, separating the mixture by a centrifuge, washing the mixture by using ethanol for at least three times, and then carrying out vacuum drying to obtain the silicon dioxide particles; and (b) adding dried silicon dioxide particles