Preparation method of TiO2-AER composite photocatalyst

The invention discloses a preparation method of a TiO2-AER composite photocatalyst.The preparation method comprises the following steps that 1, AER resin is preprocessed; 2, 0.99-5.96 mL of tetrabutyl titanate is added into 30 mL of absolute ethyl alcohol, the mixture is stirred to form a transparent faint yellow solution A, the preprocessed AER resin is added into the solution A, stirring is continuously performed, and the ratio of the amount-of-substance n (Ti) of titanium atoms to the amount-of-substance n (OH) of hydroxy in the resin is 1:(1-6); 3, the solid-liquid mixture is transferred into a 50-mL reaction kettle provided with a polytetrafluoroethylene lining, the reaction kettle is put in a constant-temperature drying box, and reacting is performed for 6-24 h; 4, the reaction kettle is naturally cooled until the temperature is lowered to room temperature, alternate washing is performed with absolute ethyl alcohol and deionized water, drying is performed, and then the TiO2-AER composite photocat