Activated carbon-loaded nano-zinc oxide ozonation catalyst and preparation and use thereof

The invention relates to an activated carbon-loaded nano-zinc oxide ozonation catalyst and preparation and use thereof. The catalyst is prepared by loading nano-zinc oxide on the surface of modified activated carbon. The modified activated carbon carrier is prepared by cleaning activated carbon with a sodium hydroxide solution, then dipping with dilute nitric acid, cleaning with deionized water and then drying. According to the catalyst disclosed by the invention, active components are prepared by adopting a coprecipitation method and taking zinc nitrate as a precursor; zinc hydroxide precipitate is generated by using a saturated zinc nitrate solution and a saturated urine solution and is attached to the surface of the modified activated carbon, and then the activated carbon the surface of which is attached with the zinc hydroxide is dried and roasted to prepare the oxidization catalyst. That is, the adsorption property of the activated carbon is reserved, and nano-zinc oxide microparticles having ozone catalysis activity are loaded in the activated carbon. Under the synergistic effect of adsorption and activation, organic pollutants in water can be adsorbed at high efficiency, and meanwhile, ozone molecules can be catalyzed and activated to produce free radicals having high oxidizability, thereby obtaining a better catalytic ozonation effect.