Preparation method of aqueous titanium dioxide photocatalyst
A titanium dioxide and photocatalyst technology, applied in the field of water-based titanium dioxide photocatalyst preparation, can solve the problem of high process complexity and high cost, and achieve the effects of simple process process, small nano-particle size and high concentration
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[0024] The invention relates to a method for preparing an aqueous titanium dioxide photocatalyst.
[0025] Configure an acid-water mixed solution containing 0.05%-2% acetic acid and 0.1%-1% hydrochloric acid or nitric acid. In order to ensure the effect, the above-mentioned acetic acid can be glacial acetic acid, hydrochloric acid can be concentrated hydrochloric acid, and nitric acid can be concentrated nitric acid. The best content should be 0.05%-2% acetic acid and 0.1%-1% hydrochloric acid or nitric acid, the best content should be 0.5%-1% acetic acid, and the content of hydrochloric acid or nitric acid should also be between 0.5%-1%.
[0026] After configuring the acid-water mixed solution, stir it vigorously, and at the same time slowly add 10%-40% titanium alkoxide. The titanium alkoxide can be butyl titanate or isopropyl titanate.
[0027] Then heat up the acid-water mixed solution after adding titanium alkoxide to 60-90°C, and keep the temperature for reaction for 1-2...
specific Embodiment 1
[0029] Prepare an acid-water mixed solution containing 0.1% glacial acetic acid and 0.3% concentrated hydrochloric acid, then vigorously stir it, at the same time slowly add 20% butyl titanate, then raise the temperature to 65°C, and keep the temperature for 1 hour , replenish the water evaporated during the heating reaction, and wait for the solution to cool down to room temperature for 12 hours after the heating reaction, so that the nano-sized anatase crystal form uniformly dispersed in the aqueous solution can be directly prepared from the aqueous solution. Titanium dioxide, and the titanium dioxide nanoparticle size distribution in the titanium dioxide aqueous solution prepared by it is about 80nm, and the solid content can be controlled at about 4%. It has a good photocatalytic effect, and the effect is still obvious under visible light, which meets the general small-scale industrial production needs. The solid content of the water-based nano-titanium dioxide photocatalys...
specific Embodiment 2
[0030] Configure an acid-water mixed solution containing 1% acetic acid and 0.5% concentrated nitric acid, then vigorously stir it, at the same time slowly add 25% butyl titanate, then raise the temperature to 80°C, and keep the temperature for 1.5 hours, It should be noted that the evaporated water is replenished during the heating reaction. After the heating reaction, the solution is cooled to room temperature and reacted for 16 hours, so that the anatase crystal form can be directly prepared from the aqueous solution and evenly dispersed in the aqueous solution. Nano-titanium dioxide in the titanium dioxide solution, and the titanium dioxide nano-particle size distribution in the titanium dioxide aqueous solution prepared by it is about 50nm, and the solid content can be controlled at about 7%. It has a good photocatalytic effect, and the effect is still obvious under visible light. production needs. The solid content of the water-based nano-titanium dioxide photocatalyst p...
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