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Preparation method of titanium oxide nanoflower film

A titanium dioxide and nanoflower technology, applied in the directions of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of high pollution, heavy metal ion environmental pollution, difficulty in large-scale production, etc., and achieve strong photocatalytic activity and preparation method. Simple, novel structure

Inactive Publication Date: 2013-04-10
王滨 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 101481140 A discloses a method for preparing titanium dioxide with a multi-stage flower-like structure, but this method requires a large amount of organic solvent (such as: glycerol) as the reaction system, and the waste liquid in the production process is likely to cause environmental pollution problems
However, the preparation of metal titanium coatings and ionic liquids by magnetron sputtering is expensive, and the use of heavy metal ions will cause serious environmental pollution.
It can be seen that these methods generally have high cost and high pollution, and are difficult to produce on a large scale.

Method used

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  • Preparation method of titanium oxide nanoflower film
  • Preparation method of titanium oxide nanoflower film
  • Preparation method of titanium oxide nanoflower film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 1mL of tetrabutyl titanate, 15mL of concentrated hydrochloric acid, and 15mL of deionized water into a 50mL reaction kettle with a polytetrafluoroethylene liner and mix evenly, then place the cleaned FTO conductive glass with a size of 1.5×3.5cm on an incline In the reaction solution, the reaction vessel was sealed and placed at 180° C. for 1 hour to react. After the reaction is finished, the product is washed and dried to prepare a titanium dioxide nanoflower film.

[0025] figure 1 It is a field emission scanning electron microscope image of the titanium dioxide nanoflower film prepared in Example 1 of the present invention. It can be seen from the cross-sectional view that the thickness of the film is about 15 μm, and the film is constructed of clusters of titanium dioxide nanoflowers. Each nanoflower is composed of petals with a length of about 1.5 μm and a width of about 450 nm.

Embodiment 2

[0027] Add 1mL of tetrabutyl titanate, 15mL of concentrated hydrochloric acid, and 15mL of deionized water into a 50mL reaction kettle with a polytetrafluoroethylene liner and mix evenly, then place the cleaned FTO conductive glass with a size of 1.5×3.5cm on an incline In the reaction solution, the reaction vessel was sealed and placed at 180° C. for 4 hours. After the reaction is finished, the product is washed and dried to prepare a titanium dioxide nanoflower film.

[0028] figure 2 It is a field emission scanning electron microscope image of the titanium dioxide nanoflower film prepared in Example 2 of the present invention. It can be seen from the cross-sectional view that the thickness of the film is about 160 μm, and the film is constructed of clusters of titanium dioxide nanoflowers. Each nanoflower is composed of petals with a length of about 1.9 μm and a width of about 400 nm.

Embodiment 3

[0030] Add 1mL of tetrabutyl titanate, 15mL of concentrated hydrochloric acid, and 15mL of deionized water into a 50mL reaction kettle with a polytetrafluoroethylene liner and mix evenly, then place the cleaned FTO conductive glass with a size of 1.5×3.5cm on an incline In the reaction solution, the reaction vessel was sealed and placed at 180° C. for 24 hours. After the reaction is finished, the product is washed and dried to prepare a titanium dioxide nanoflower film.

[0031] image 3 It is the field emission scanning electron microscope image of the titanium dioxide nanoflower film prepared in Example 3 of the present invention. It can be seen from the cross-sectional view that the thickness of the film is about 300 μm, and the film is constructed of clusters of titanium dioxide nanoflowers. Each nanoflower is composed of petals with a length of about 1.3 μm and a width of about 380 nm.

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Abstract

The invention relates to a preparation method of a titanium oxide nanoflower film, which comprises the steps of uniformly mixing tetrabutyl titanate, concentrated hydrochloric acid and deionized water at a volume ratio of (1-3):15:15 in a reaction kettle provided with a teflon lining, obtaining a clear reaction solution, placing washed FTO (Fluorine doped Tin Oxide) conductive glass in the solution obliquely, sealing the reaction kettle, and allowing the reaction kettle to react at 120-180 DEG C for 1-24h, washing a product after the reaction, drying, and obtaining the titanium oxide nanoflower film. The titanium oxide nanoflower film has hydrophilicity, the average thickness of the film is 10-300 micrometers, and the film is formed by petals with lengths of 1.3-3.2 micrometers and widths of 380-710nm. According to the method, an organic solvent, heavy metal ions or hypertoxic hydrofluoric acid is not used, and the method has the characteristics of low cost, and high safety and controllability. The fabricated titanium oxide nanoflower film is high in photocatalytic activity, and is expected to have wide application prospects in the fields of photocatalytic sterilizing materials, environmental pollution controlling, dye sensitization solar cells and the like.

Description

technical field [0001] The invention relates to a preparation method of nanomaterials, in particular to a preparation method of a titanium dioxide nanoflower film. Background technique [0002] Titanium dioxide is one of the most promising semiconductor photocatalysts, and its morphology, size and microstructure will have an important impact on its performance. At present, the preparation of titanium dioxide with a new structure plays an important role in further improving its photocatalytic activity. There have been many reports on the preparation methods of titanium dioxide nanotubes, nanorods, nanohollow spheres, nanosheets and nanoflowers. Among them, the three-dimensional structure of nanoflowers has the characteristics of porosity and high specific surface area. This structure not only facilitates the adsorption of reactants on its surface, but also allows multiple reflections of light on the surface, thereby improving the light utilization efficiency. Therefore, tit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
Inventor 王滨吕晓莹
Owner 王滨
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