Method for one-step growth of titanium dioxide nano-flower films on surface of stainless steel
A stainless steel, nanoflower technology, applied in the direction of titanium dioxide, nanotechnology for materials and surface science, titanium oxide/hydroxide, etc., can solve the problems that are not conducive to effective separation of photogenerated carriers, low photon utilization, active It can improve the photocatalytic efficiency, the preparation technology is simple, and the reaction conditions are mild.
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Embodiment 1
[0022] Step 1 Configure the reaction solution
[0023] In hydrogen peroxide with a concentration of 30% by mass, 0.28 mol / L nitric acid was added to obtain a reaction solution.
[0024] Step 2 Growing Nanoflower Films
[0025] The cleaned and dried 304 stainless steel was immersed in the reaction solution, 0.25 g of titanium sponge was added as a titanium source, and the reaction was carried out at 80° C. for 24 hours.
[0026] reaction result
[0027] figure 1 The low-magnification scanning electron microscope photo shows that the surface of stainless steel is uniformly covered with nanoflower film. figure 2 High-magnification scanning electron microscope pictures show that the size of nanoflowers is about 300-500nm, and the sizes of different nanoflowers are different. image 3 The X-ray diffraction results show that the nanoflower film is a well-crystallized rutile phase TiO 2 .
Embodiment 2
[0029] Step 1 Configure the reaction solution
[0030] Same as Example 1.
[0031] Step 2 Growing Nanoflower Films
[0032] The cleaned and dried 304 stainless steel was immersed in the reaction solution, 0.25 g of titanium sponge was added as a titanium source, and the reaction was carried out at 80° C. for 48 hours.
[0033] reaction result
[0034] Figure 4 The low-magnification scanning electron microscope photo shows that the nanoflower film grows densely; Figure 5 The high-magnification scanning electron microscope photo shows that, compared with Example 1, the morphology of the obtained nanoflowers is similar. Image 6 High-magnification scanning electron microscope photos show that the thickness of the nanoflower film is about 400nm.
Embodiment 3
[0036] Step 1 Configure the reaction solution
[0037] In hydrogen peroxide with a concentration of 15% by mass, 0.14 mol / L nitric acid was added to obtain a reaction solution.
[0038] Step 2 Growing Nanoflower Films
[0039] Same as Example 2.
[0040] reaction result
[0041] Figure 7 The low magnification scanning electron microscope photo shows that the surface of the stainless steel is uniformly covered with a nanoflower film, and a small amount of nanoflower particles are distributed on it; Figure 8 The high-magnification scanning electron microscope photos show that, compared with the morphologies obtained by the reactions in Examples 1 and 2, the size of the nanoflowers is slightly smaller and the size is more uniform.
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