Preparation method for infusorial earth/ titanium dioxide composite photocatalyst with nuclear/shell structure
A technology of titanium dioxide and shell structure, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of adsorption performance decline, diatomite pollution, etc., and achieve simple operation, high adsorption performance, The effect of simple preparation method
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[0034] Example 1
[0035] 0.38 mL of butyl titanate was added to 8 mL of absolute ethanol, and stirred for 2 minutes, 0.1 g of diatomaceous earth powder was added to the lower alcohol, ultrasonic and stirring were each for 3 minutes. Pour the anhydrous alcohol solution containing diatomaceous earth and butyl titanate into the crucible, and then place the crucible on the upper part of the sealable container. 3mL of distilled water is preliminarily placed at the bottom of the sealable container. After sealing the container, put it into an oven, start heating to 150°C, with a heating rate of 10-20°C / min, and keep it for 12 hours after the temperature reaches the set temperature. After the heat preservation is over, cool to room temperature naturally, open the airtight container, take out the crucible, pour out the powder, wash with distilled water and anhydrous alcohol 3 times each, and dry in vacuum at 60°C for 8 hours.
[0036] figure 1 The X-ray diffraction pattern of the core / sh...
Example Embodiment
[0038] Example 2
[0039] Add 0.19 mL of butyl titanate to 8 mL of absolute ethanol, stir for 2 minutes, add 0.1 g of diatomaceous earth powder to the lower alcohol, sonicate and stir for 3 minutes each. Pour the anhydrous alcohol solution containing diatomaceous earth and butyl titanate into the crucible, and then place the crucible on the upper part of the sealable container. 3mL of distilled water is preliminarily placed at the bottom of the sealable container. After sealing the container, put it into an oven, start heating to 200°C, with a heating rate of 10-20°C / min, and keep it for 6 hours after the temperature reaches the set temperature. After the heat preservation is over, cool to room temperature naturally, open the airtight container, take out the crucible, pour out the powder, wash with distilled water and anhydrous alcohol 3 times each, and dry in vacuum at 60°C for 8 hours.
Example Embodiment
[0040] Example 3
[0041] 0.14 mL of titanium tetrachloride and 8 mL of absolute ethanol were used to prepare a titanium alcohol solution, 0.1 g of diatomaceous earth powder was added to the above solution, ultrasonic and stirring were each for 3 minutes. Pour the anhydrous alcohol solution containing diatomaceous earth and titanium tetrachloride into the crucible, and then place the crucible on the upper part of the sealable container. 3mL of distilled water is preliminarily placed at the bottom of the sealable container. After sealing the container, put it into an oven, start heating to 150°C, with a heating rate of 10-20°C / min, and keep it for 12 hours after the temperature reaches the set temperature. After the heat preservation is over, cool to room temperature naturally, open the airtight container, take out the crucible, pour out the powder, wash with distilled water and anhydrous alcohol 3 times each, and dry in vacuum at 60°C for 8 hours.
[0042] image 3 The X-ray diff...
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