Method for preparing titanium dioxide nanoflower array film
A titanium dioxide and nanoflower technology, which is applied in the directions of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of uncontrollable size of nanoflowers, grain growth, and decrease in specific surface area, so as to avoid the decrease of specific surface area, The effect of good crystallinity and low cost
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Embodiment 1
[0024] 1) Mix hydrofluoric acid with a mass percentage concentration of 55%, nitric acid with a mass percentage concentration of 65% and deionized water in a volume ratio of 1:3:6 to obtain a pickling solution.
[0025] 2) Set the size to 5×5×0.01 (cm 3 ) metal titanium plates were acid-washed with the above-mentioned mixed acid at 60°C, and then cleaned with deionized water in ultrasonic waves.
[0026] 3) 1.0 ml of 63% nitric acid and 100 mg of melamine were sequentially added to 50 ml of 30% hydrogen peroxide solution to obtain a reaction solution.
[0027] 4) Immerse the cleaned metal titanium plate in 50 ml of reaction solution, react at 80°C for 60 hours, and wash it with deionized water after the reaction.
[0028] 5) Use a sulfuric acid solution with a concentration of 98% by mass to adjust the pH of the hot water to 1.0, immerse the titanium sheet obtained in step 4) in 50 ml of hot water, and react at 80°C for 72 hours. After the reaction, use a deionized Washed wi...
Embodiment 2
[0030] 1) Same as step 1) of Example 1.
[0031] 2) Same as Step 2) of Example 1.
[0032] 3) 1.0 ml of 63% nitric acid and 150 mg of melamine were sequentially added to 50 ml of 30% hydrogen peroxide solution to obtain a reaction solution.
[0033] 4) Immerse the cleaned metal titanium plate in 50 ml of reaction solution, react at 80°C for 72 hours, and wash it with deionized water after the reaction.
[0034] 5) Use a sulfuric acid solution with a concentration of 98% by mass to adjust the pH of the hot water to 1.3, immerse the titanium sheet obtained in step 4) in 50 ml of hot water, and react at 70°C for 72 hours. After the reaction, use a deionized Washed with water and dried to obtain a titanium dioxide nanoflower array film (see image 3 ). The diameter of the nanoflowers is about 700 nanometers, and the maximum width of the leaves is about 80-100 nanometers. The ends are sharper, and there are a small number of branches at the top of the leaves. Different nanoflowe...
Embodiment 3
[0036] 1) Same as step 1) of Example 1.
[0037] 2) Same as Step 2) of Example 1.
[0038] 3) 0.75 ml of 63% nitric acid and 100 mg of melamine were sequentially added to 50 ml of 30% hydrogen peroxide solution to obtain a reaction solution.
[0039] 4) Same as Step 4) of Example 2.
[0040] 5) Use a sulfuric acid solution with a concentration of 98% by mass to adjust the pH of the hot water to 1.6, immerse the titanium sheet obtained in step 4) in 50 ml of hot water, and react at 60°C for 90 hours. After the reaction, use a deionized Washed with water and dried to obtain the nanoflower array film (see Figure 4 ). Nanoflower arrays are evenly distributed on the surface of the titanium sheet, with an average diameter of about 700 nanometers. The "blades" of the nanoflowers are long and narrow, with sharp ends and no obvious forks. The leaf width is at a maximum of about 50-70 nm.
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