Photocatalytic concrete material sprayed with titanium dioxide/activated zeolite composite material and preparation method thereof

A method of, preparing a photocatalytic concrete material by spraying a photocatalytic sizing agent on a concrete block, comprising:

• step 1:
• activating a nature zeolite molecular sieve to obtain an activated zeolite molecular sieve;
• step 2:
• preparing a titanium dioxide/activated zeolite composite with the activated zeolite molecular sieve, tetrabutyl titanate, anhydrous ethanol, acetic acid, and nitric acid;
• step 3:
• preparing a photocatalytic sizing agent with the titanium dioxide/activated zeolite composite;
• and
• step 4:
• preparing a photocatalytic concrete material with the photocatalytic sizing agent;
• wherein the step 3 further comprises
• dispersing the titanium dioxide/activated zeolite composite into water to form a suspension;
• adding a dispersant and an emulsifier into the suspension;
• and
• stirring and obtaining the photocatalytic sizing agent, wherein the dispersant is sodium dodecyl benzene sulfonate;
• wherein the step 4 of preparing the photocatalytic concrete material with the photocatalytic sizing agent comprises:
• spraying the prepared photocatalytic sizing agent on surface of a concrete block, drying in the air naturally and obtaining the photocatalytic concrete material;
• wherein the prepared photocatalytic sizing agent is sprayed on surface of the concrete block for 1 to 10 layers;
• wherein
• the step 1 further comprises:
• washing the natural zeolite molecular sieve with distilled water;
• placing the washed natural zeolite molecular sieve into an oven and drying the washed natural zeolite molecular sieve in the oven under a temperature of 70-90° C.;
• placing the dried natural zeolite molecular sieve into a high temperature furnace and calcining the dried natural zeolite;
• obtaining the activated zeolite molecular sieve;
• the step 2 further comprises:
• dissolving tetrabutyl titanate into anhydrous ethanol, stirring and forming a first mixture;
• adding the activated zeolite molecular sieve slowly into the first mixture, mixing for 20 minutes and obtaining a second mixture, wherein TiO2 and the activated zeolite molecular sieve has a mass ratio of 1:0.5;
• adding acetic acid and nitric acid into the second mixture slowly to obtain a third mixture;
• mixing the third mixture for 10 minutes and adjusting the third mixture to a pH of 3, keep mixing for 1 hour and aging for 24 hours under a sealed condition to obtain a sol;
• and
• drying the sol for 12 hours in an oven of 90° C., calcining the dried sol for 2 hours at 500° C., grinding the calcined sol and obtaining the titanium dioxide/activated zeolite composite;
• in the step 3:
• the dispersant is sodium dodecyl benzene sulfonate;
• the emulsifier is alkyl aryl polyoxyethylene ester, wherein 0.2066 g of sodium dodecyl benzene sulfonate, and 0.15 g of the emulsifier are added for each 5 g of the titanium dioxide/activated zeolite composite;
• and
• in a production process of the concrete block in the step 4, a water cement ratio is 0.375, and a curing age is 3 days, and the prepared photocatalytic sizing agent is sprayed on surface of the concrete block for 10 layers, drying in the air naturally and obtaining the photocatalytic concrete material.