Slow-release nano zinc oxide antibacterial agent and preparation method thereof

The invention discloses a slow-release nano zinc oxide antibacterial agent and a preparation method thereof, and the method comprises the following steps: uniformly mixing a pre-prepared metal salt solution and a silicon source solution to obtain a silicon source mixed solution, adding an acid solution into the silicon source mixed solution, and uniformly stirring to obtain a precursor solution, the metal salt solution is prepared from zinc salt and ionized water, and the silicon source solution is prepared from a silicon source and an organic solvent; atomizing the precursor solution through an atomizer to obtain aerosol droplets; and introducing the obtained aerosol droplets into a tubular furnace, and calcining to obtain the slow-release nano zinc oxide antibacterial agent. The nano-zinc oxide in the slow-release nano-zinc oxide antibacterial agent prepared by the invention is uniformly dispersed in the silicon dioxide spheres, and the nano-zinc oxide is not agglomerated, so that the antibacterial property