Low-temperature two-step method for preparing composite anatase type titanium dioxide visible light catalyst
An anatase type, titanium dioxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst activation/preparation, etc., can solve the problem of reducing photocatalytic performance, loss of doping elements, Catalyst agglomeration and other problems, to achieve the effect of improving photocatalytic performance, reducing the degree of agglomeration, and uniform dispersion
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Embodiment 1
[0018] Example 1: Add 0.06mol tetrabutyl titanate to 1.80mol ethanol, stir and mix evenly, add 0.01mol zinc acetate, stir well, add 0.04mol concentrated nitric acid dropwise, stir for 5min, then slowly add 0.10mol deionized water , keep stirring vigorously during the dropping process, place the container in a water bath at 60°C and continue stirring, and react for 1.5 hours to prepare zinc-doped titanium dioxide colloid. After the above-prepared colloid is cooled to room temperature, move it into a high-pressure container, then add 0.04mol zinc carbonate, seal the container, keep it at 90°C for 18 hours, filter the precipitate, rinse it with deionized water, and dry it at 60°C. Zinc-doped anatase titanium dioxide powder was obtained. The X-ray diffraction pattern of the prepared powder was calculated by Scherrer equation (Scherrer equation), and the average crystal diameter was 8.8nm.
[0019] Visible light catalysis experiment: Take 0.2g of the prepared catalyst, add it into...
Embodiment 2
[0020] Example 2: Add 0.02 mol of isopropyl titanate to 1.40 mol of ethanol, stir and mix evenly, add 0.003 mol of silver nitrate, add 0.05 mol of lactic acid dropwise after stirring well, and slowly add 0.05 mol of deionized water dropwise after stirring for 5 minutes, Vigorous stirring was maintained during the dropping process, and the container was placed in a 50° C. water bath to continue stirring. After 2 hours of reaction, a silver-doped titanium dioxide colloid was obtained. After the above-prepared colloid is cooled to room temperature, move it into a high-pressure container, then add 0.008mol ammonium carbonate, seal the container, keep it at 98°C for 26 hours, filter the precipitate, rinse it with deionized water, and dry it at 75°C. The silver-doped anatase titanium dioxide powder was obtained, and the average crystal diameter was 10.8nm. Visible photocatalytic performance test is the same as that of Example 1, and the result shows that the degradation rate of meth...
Embodiment 3
[0021] Example 3: Add 0.09mol tetrabutyl titanate to 1.98mol isopropanol, stir and mix evenly, then add 0.005mol tantalum ethoxide, stir well and then add 0.08mol concentrated hydrochloric acid dropwise, after stirring for 5 minutes, slowly add 0.15mol dropwise to remove Ionized water, keep stirring vigorously during the dropping process, place the container in a water bath at 75°C and continue stirring, and react for 1.5 hours to prepare tantalum-doped titanium dioxide colloid. After the above-prepared colloid is cooled to room temperature, move it into a high-pressure container, then add 1.05mol hydrogen peroxide, seal the container, keep it at 92°C for 22 hours, filter the precipitate, rinse it with deionized water, and dry it at 65°C to obtain Tantalum doped anatase titanium dioxide powder, the average crystal diameter is 9.7nm. Visible photocatalytic performance test is the same as that of Example 1, and the result shows that the degradation rate of methyl orange is 93.6%...
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