A preparation method of nitrogen-doped titanium dioxide supported on porous carrier by gas phase method
A technology of porous carrier and titanium dioxide, which is applied in the field of photocatalytic materials, can solve the problems of complex preparation process, high preparation cost, and difficulty in batch production, and achieve the effects of fine and uniform loaded particles, simple preparation method, less separation and less pollution
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Embodiment 1
[0023] Weigh 10g of diatomite commercially available in the industry, according to the nitrogen source: the mass fraction ratio of porous material is 2: 1, add 20g of ammonium carbonate and mechanically grind and mix evenly, according to the nitrogen: The ratio is 5: 1 in the inner substrate of the reactor 0.2 mol of titanium tetrachloride was added. The preparation is carried out in a sealed reaction kettle, which is divided into two layers, with a partition with holes in the middle. Put a mixture of diatomaceous earth and ammonium carbonate on the microporous partition on the upper part of the reaction kettle, and react
[0024] Seal the kettle and place it in an oven, treat it at 100°C for 24 hours, cool it and take out the powder, put it in a muffle furnace for calcination at 400°C for 6 hours, and prepare a diatomite-supported nitrogen-doped titanium dioxide composite material with visible light absorption sideband peaks 450nm. UV-Vis absorption spectroscopic analysis s...
Embodiment 2
[0026] Weigh 10 g of attapulgite commercially available in the industry, according to the nitrogen source: the mass fraction ratio of porous material is 0.5: 1, add 5 g of urea and mechanically grind and mix evenly, according to the nitrogen: titanium molar ratio is 5: 1 in the inner substrate of the reactor 0.83 mol of titanium tetrachloride was added. Put a mixture of diatomaceous earth and ammonium carbonate on the microporous partition on the upper part of the reaction kettle, seal the reaction kettle and put it in an oven, treat it at 120°C for 8 hours, take out the powder after cooling, and put it in a muffle furnace for 550 Calcined at ℃ for 10 hours, the halloysite-loaded nitrogen-doped titanium dioxide composite material was prepared, and the visible light absorption sideband peak was 480nm. UV-Vis absorption spectroscopic analysis such as figure 1 Shown in b. The rest are the same as embodiment 1.
Embodiment 3
[0028] Take by weighing 10g of halloysite commercially available in the industry, according to the nitrogen source: the mass fraction ratio of porous material is 2: 1, add dropwise 60 milliliters of aqueous solution containing 20g of ammonium nitrate, and place it on the upper part of the reactor with holes after standing at 40°C for 12 hours. screen separator. Add 0.25 mol of titanium tetrachloride to the inner substrate of the reactor according to the nitrogen-titanium molar ratio of 1:1, seal the reactor and put it in an oven, treat it at 150°C for 18 hours, cool the powder, and put it in a muffle Calcined in a furnace at 580°C for 4 hours to prepare the halloysite-loaded nitrogen-doped titanium dioxide composite material, the visible light absorption sideband peak is 700nm. UV-Vis absorption spectroscopic analysis such as figure 1 As shown in c. The rest are the same as embodiment 1.
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