Hollow spherical rutile titanium dioxide mesocrystal and preparation method thereof
A rutile titanium dioxide, hollow spherical technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high energy consumption, poor environmental friendliness, and high industrialization cost
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Embodiment 1
[0025] 1) Take 3 mL of nitric acid with a mass percentage of 63% and add it to 50 mL of a 10% hydrogen peroxide solution;
[0026] 2) Add potassium titanium oxalate to the solution obtained in step 1), so that the concentration of potassium titanium oxalate in the solution is 100 mmol / L, and mix thoroughly by ultrasonic oscillation to obtain a dark red transparent solution;
[0027] 3) Seal the dark red transparent solution obtained in step 2) and place it at 80 o C oven, keep warm for 72 hours, centrifuge, wash and dry to obtain white powder, which is hollow spherical rutile titanium dioxide mesocrystal.
[0028] The hollow spherical rutile titanium dioxide mesocrystal prepared in this example is as follows figure 1 , 2 As shown, the width of the nanorods is about 100-250 nm, the length is about 200-500 nm, and the diameter of the hollow sphere assembled by the nanorods is 3.0-6.0 μm. image 3 The XRD results confirmed that the obtained powder was well-crystallized rutile ...
Embodiment 2
[0031] 1) Take 1 mL of nitric acid with a mass percentage of 63% and add it to 50 mL of a 10% hydrogen peroxide solution;
[0032] 2) Add potassium titanium oxalate to the solution obtained in step 1), so that the concentration of potassium titanium oxalate in the solution is 100 mmol / L, and mix thoroughly by ultrasonic oscillation to obtain a dark red transparent solution;
[0033] 3) Seal the dark red transparent solution obtained in step 2) and place it at 80 o C oven, heat preservation for 72 hours, centrifuged, washed, dried to obtain a white powder.
[0034] The SEM photograph of the hollow spherical rutile titanium dioxide mesocrystal that this example makes is as follows Figure 13 , the structural unit nanorods have a length of 150-250 nm and a width of 70-150 nm.
Embodiment 3
[0036] 1) Take 3 mL of nitric acid with a mass percentage of 63% and add it to 50 mL of a 10% hydrogen peroxide solution;
[0037] 2) Add potassium titanium oxalate to the solution obtained in step 1) so that the concentration of potassium titanium oxalate in the solution is 200 mmol / L, and mix thoroughly by ultrasonic oscillation to obtain a dark red transparent solution;
[0038] 3) Seal the dark red transparent solution obtained in step 2) and place it at 80 o C oven, heat preservation for 72 hours, centrifuged, washed, dried to obtain a white powder.
[0039] The SEM photograph of the hollow spherical rutile titanium dioxide mesocrystal that this example makes is as follows Figure 14 , the length of the structural unit nanorod is about 150-200 nm, and the width is about 50-100 nm.
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