A kind of method adopting freeze-drying method to prepare porous titania nanometer material
A technology of porous titanium dioxide and nanomaterials, applied in the field of materials, can solve the problems of poor product purity, cumbersome preparation steps, and large amount of raw materials used, and achieve the effects of large-scale production, simple experimental steps, and excellent structure
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Embodiment 1
[0017] Example 1: Such as figure 1 As shown in —2, take a 20ml glass a bottle, add 1ml tetrabutyl titanate and 2ml hydrochloric acid solution (1M), stir for 3 hours, the solution turns from turbidity to clear. Place the small black bottle on the ground and infuse with liquid nitrogen to ensure rapid freezing of the liquid, and then transfer it to a freeze dryer for 12h freeze drying. After the drying is finished, transfer the small black bottle to the muffle furnace for 500°C calcination, the heating rate is 2°C / min, the holding time is 4h, and the cooling rate is the same as the heating rate to obtain the porous titanium dioxide nanomaterial.
Embodiment 2
[0018] Example 2: Such as figure 1 As shown, take a 20ml small black bottle, add 1ml tetrabutyl titanate and 4ml hydrochloric acid solution (1M), stir for 3 hours, the solution turns from turbidity to clear. Place the small black bottle on the ground and infuse with liquid nitrogen to ensure rapid freezing of the liquid, and then transfer it to a freeze dryer for 12h freeze drying. After the drying is over, transfer the small black bottle to the muffle furnace for calcination at 500 degrees, the heating rate is 2°C / min, the holding time is 4h, and the cooling rate is the same as the heating rate to obtain the porous titanium dioxide nanomaterial.
Embodiment 3
[0019] Example 3: Such as figure 1 and image 3 As shown, take a 20ml small black bottle, add 1ml tetrabutyl titanate and 2ml hydrochloric acid solution (1M), after stirring for 24 hours, the solution turns from turbidity to clear. Place the small black bottle on the ground and infuse liquid nitrogen to ensure that the liquid is quickly cooled and calcined at 500 degrees. The heating rate is 2°C / min, the holding time is 4h, and the cooling rate is the same as the heating rate to obtain porous titanium dioxide nano material.
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