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A method for one-step growth of titanium dioxide nanoflower film on the surface of stainless steel

A technology of stainless steel and nanoflowers, 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 the effective separation of photogenerated carriers, limited active sites, and photon utilization Low efficiency and other problems, to achieve the effects of improved photocatalytic efficiency, mild reaction conditions, and simple preparation technology

Active Publication Date: 2021-08-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO prepared by this method 2 It is a zero-dimensional nanoparticle. Compared with one-dimensional and three-dimensional nanostructures, the surface area is relatively small. When used as a photocatalyst, the photon utilization rate is low, the active sites are limited, and it is not conducive to the effective separation of photogenerated carriers.

Method used

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  • A method for one-step growth of titanium dioxide nanoflower film on the surface of stainless steel
  • A method for one-step growth of titanium dioxide nanoflower film on the surface of stainless steel
  • A method for one-step growth of titanium dioxide nanoflower film on the surface of stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1 Configure the reaction solution

[0023] Add 0.28 mol / liter of nitric acid to 30% hydrogen peroxide by mass percentage to obtain a reaction liquid.

[0024] Step 2: Growing Nanoflower Films

[0025] After cleaning and drying, 304 stainless steel was immersed in the reaction solution, and 0.25 g of titanium sponge was added as a titanium source, and reacted at 80° C. for 24 hours.

[0026] Response result

[0027] figure 1 The low-magnification scanning electron microscope photos show that the surface of the stainless steel is uniformly covered with a nanoflower film. figure 2 The high-magnification scanning electron microscope pictures show that the scale of nanoflowers is about 300-500nm, and the size of different nanoflowers has certain differences. 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] With embodiment 1.

[0031] Step 2: Growing Nanoflower Films

[0032] After cleaning and drying, 304 stainless steel was immersed in the reaction solution, and 0.25 g of titanium sponge was added as a titanium source, and reacted at 80° C. for 48 hours.

[0033] Response result

[0034] Figure 4 The low-magnification scanning electron microscope photos show that the nanoflower film grows densely; Figure 5 The high-magnification scanning electron micrographs show that compared with Example 1, the obtained nanoflowers have similar morphology. Figure 6 The 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] Add 0.14 mol / liter of nitric acid to hydrogen peroxide with a concentration of 15% by mass to obtain a reaction solution.

[0038] Step 2: Growing Nanoflower Films

[0039] With embodiment 2.

[0040] Response result

[0041] Figure 7 The low-magnification scanning electron microscope photos show 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 morphology 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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Abstract

The invention discloses a method for growing a titanium dioxide nano flower film on the surface of stainless steel in one step. Immerse the cleaned and dried stainless steel sheet in the hydrogen peroxide solution added with nitric acid, use sponge titanium as the titanium source, and keep it warm at 80-90°C for 24-48 hours to cover the surface of the stainless steel with a uniform titanium dioxide nanoflower film. The method of the invention is simple and low in cost, and the prepared nano-flower-shaped titanium dioxide film evenly covers the stainless steel surface and is firmly bonded, and can be applied to the fields of self-cleaning, sterilization, photocatalysis and the like.

Description

technical field [0001] The invention discloses a method for one-step growth of TiO on the surface of stainless steel 2 Nanoflower thin film technology can be applied in self-cleaning, sterilization, sewage treatment, atmospheric treatment, etc., and belongs to the field of environmental protection and new materials. Background technique [0002] TiO 2 As a transition metal oxide, because of its high visible light transmittance, good chemical stability, non-toxicity, and environmental friendliness, it is widely used in photocatalytic degradation of organic pollutants, photolysis of water to produce hydrogen, and dye-sensitized solar cells. , sterilization, self-cleaning, gas sensing and many other fields have huge applications. Based on its wide range of applications, TiO with special nanostructure and special physical and chemical properties can be grown on the surface of different types of materials such as metals, glass, ceramics, etc. 2 Thin films are important. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/00C01G23/053B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/053C01P2002/72C01P2004/03C01P2004/30C01P2004/62C23C26/00
Inventor 张喆吴进明
Owner ZHEJIANG UNIV