Large-size highly photocatalytic active titanium dioxide microsphere and preparation method thereof
A technology of titanium dioxide and catalytic activity, which is applied in the field of large-scale high photocatalytic activity titanium dioxide microspheres and its preparation, can solve the problems of being unsuitable for large-scale production and application, unfavorable for large-scale application, and unable to settle quickly, achieving excellent photocatalytic activity, Convenient recycling and reuse, low cost effect
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Embodiment 1
[0035] (1) Add titanium hydroxide powder into the sodium hydroxide solution, wherein the ratio of the mass of titanium hydroxide to the volume of the alkali solution is 15 g / l, and the mixed solution is stirred and reacted at 25° C. for 2 hours to synthesize dispersion A; (2) The above dispersion A mixed with 0.01 mmol / L cetyltrimethylammonium bromide was moved into a stainless steel reactor lined with polytetrafluoroethylene, and hydrothermally treated at 250°C for 4 hours at a speed of 10 rpm; (3) The reaction kettle after hydrothermal treatment is cooled to room temperature, and the filtered precipitate is treated with 1 mol / L hydrochloric acid, washed, and dried at 60°C for 12 hours; (4) the dried sample is roasted at 250°C for 24 hours, then Obtain large size self-assembled titanium dioxide microspheres.
[0036] The morphology of titanium dioxide microspheres prepared in this example is as follows figure 1 As shown, it can be seen that the titanium dioxide microspheres ...
Embodiment 2
[0039] (1) Add the titanium hydroxide powder into the potassium hydroxide solution, wherein the ratio of the mass of the titanium hydroxide powder to the volume of the alkali solution is 1 g / l, and the mixed solution is stirred and reacted at 25° C. for 2 hours to synthesize the dispersion A; (2) Mix the above dispersion A with 5 mmol / L sodium dodecylbenzene sulfonate and 10 mmol / L polyvinyl alcohol into a stainless steel reaction kettle lined with polytetrafluoroethylene, at 120°C at 1 rpm Underwater heat treatment for 48 hours; (3) the reactor after the hydrothermal treatment was cooled to room temperature, and the filtered precipitate was treated with 0.1 mol / liter hydrochloric acid, washed, and dried at 40°C for 24 hours; (4) the dried sample was heated at 350 After calcination at ℃ for 6 hours, large-sized self-assembled titanium dioxide microspheres can be obtained, and the diameter of the microspheres is 0.1-1.5 mm.
[0040] Prepared TiO 2 The result of microspheres de...
Embodiment 3
[0042] (1) Add titanium hydroxide powder to the mixed solution of sodium hydroxide and ammonia water, wherein the ratio of the mass of titanium hydroxide powder to the volume of the alkali solution is 50 g / l, and the mixed solution is stirred and reacted at 35°C for 4 hours to synthesize dispersion A (2) the above-mentioned dispersion liquid A is mixed with 10 mmol / L sodium oleate and moved into a stainless steel reaction kettle lined with polytetrafluoroethylene, and hydrothermally treated at 180° C. for 1 hour with a speed of 100 rpm; (3) Hydrothermally treated After the reactor was cooled to room temperature, the filtered precipitate was treated with 2 mol / L nitric acid, washed, and dried at 80°C for 4 hours; (4) the dried sample was roasted at 550°C for 1 hour to obtain a large Size self-assembled titanium dioxide microspheres, the diameter of the microspheres is 0.2-3 mm.
[0043] Prepared TiO 2 The results of microspheres degrading phenol showed that the degradation rat...
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