Preparation method of multilevel structural titanium dioxide nano flower string

A technology of titanium dioxide and nanoflowers, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., to achieve the effects of low cost, wide adjustable range of parameters, and simple process and process

Inactive Publication Date: 2015-04-22
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, researchers have used various methods to synthesize a variety of titanium dioxide nanostructures with different morphologies, which greatly improved the efficiency of the material. There is a lot of room for research

Method used

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  • Preparation method of multilevel structural titanium dioxide nano flower string
  • Preparation method of multilevel structural titanium dioxide nano flower string
  • Preparation method of multilevel structural titanium dioxide nano flower string

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Take 0.5 milliliters of tetrabutyl titanate, 40 milliliters of acetic acid and 0.1 gram of silver nitrate to prepare a mixed solution, and stir;

[0031] (2) Disperse 0.05 gram of titanium dioxide nanobelts in the above-mentioned solution, stir to make it evenly mixed;

[0032] (3) Put the above suspension into a polytetrafluoroethylene-lined stainless steel autoclave, and conduct a hydrothermal reaction at 150° C. for 6 hours;

[0033] (4) After the reaction, the precipitated product is washed with distilled water and absolute ethanol, dried at 80° C. for 6 to 24 hours, and ground into powder;

[0034] (5) The obtained powder is placed in a muffle furnace and calcined at 450° C. for 30 minutes to obtain a multi-level titanium dioxide nano flower string.

[0035] The resulting product was characterized by its structure and crystal form by SEM and XRD, respectively, figure 1 The morphology of titanium dioxide obtained under this reaction condition. It can be seen ...

Embodiment 2

[0037] (1) Take 0.5 milliliters of tetrabutyl titanate, 40 milliliters of acetic acid and 0.1 gram of silver nitrate to prepare a mixed solution, and stir;

[0038] (2) Disperse 0.05 gram of titanium dioxide nanobelts in the above-mentioned solution, stir to make it evenly mixed;

[0039] (3) Put the above suspension into a polytetrafluoroethylene-lined stainless steel autoclave, and conduct a hydrothermal reaction at 150° C. for 8 hours;

[0040] (4) After the reaction, the precipitated product is washed with distilled water and absolute ethanol, dried at 80° C. for 6 to 24 hours, and ground into powder;

[0041] (5) The obtained powder is placed in a muffle furnace and calcined at 450° C. for 30 minutes to obtain a multi-level titanium dioxide nano flower string.

[0042] The structures of the obtained products were characterized by TEM, figure 2 The morphology of titanium dioxide obtained under this reaction condition. It can be seen from the figure that under this cond...

Embodiment 3

[0044] (1) Take 3.5 milliliters of tetraethyl titanate, 35 milliliters of oxalic acid and 0.35 grams of silver citrate to prepare a mixed solution, and stir;

[0045] (2) 0.35 gram of titanium dioxide nanobelts are dispersed in the above-mentioned solution, and stirred to make it evenly mixed;

[0046] (3) Put the suspension into a polytetrafluoroethylene-lined stainless steel autoclave, and conduct a hydrothermal reaction at 180° C. for 6 hours;

[0047] (4) After the reaction, the precipitated product is washed with distilled water and absolute ethanol, dried at 80° C. for 6 to 24 hours, and ground into powder;

[0048] (5) The obtained powder is placed in a muffle furnace and calcined at 450° C. for 30 minutes to obtain a multi-level titanium dioxide nano flower string.

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Abstract

The invention discloses a preparation method of a multilevel structural titanium dioxide nano flower string. The method is characterized by comprising the steps: dispersing a titanium dioxide nanoribbon into a mixed solution of a titanium source, a silver source and an acid, severely stirring and uniformly mixing to obtain a suspension, placing the suspension into a stainless steel autoclave with a polytetrafluoroethylene liner, carrying out hydrothermal reaction to obtain a product, washing and drying the product, then grinding the product into powder, and calcining the obtained powder in a muffle furnace to obtain a multilevel structural titanium dioxide nano flower string growing on the nanoribbon. By adopting the preparation method, the flower-shaped titanium dioxide can be successfully enabled to grow along the direction of the nanoribbon to form a flower-string structure; the product is uniform in distribution, the specific surface area is large, and the photocatalytic activity is high; meanwhile, the method has the advantages of simple and convenient process and flow and the like.

Description

technical field [0001] The invention relates to the field of preparation of multilevel titanium dioxide nanostructures, in particular to a preparation method for growing nano flower strings on titanium dioxide nanobelts. Background technique [0002] Nanomaterials have become a focus in the field of material science research. Among them, the design and controllable preparation of nanomaterials and the research in the field of photocatalysis have become hot research topics of high-tech nowadays. Among them, as an n-type semiconductor material, nano-titanium dioxide has the advantages of strong photocatalytic ability, good chemical stability, safety and non-toxicity, no secondary pollution, light corrosion resistance, low cost, and easy availability of raw materials. It has a wide range of applications in sewage treatment, photolysis of water to produce hydrogen, antibacterial, anti-fog self-cleaning, solar cells and cosmetics. [0003] When titanium dioxide is used in photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
CPCC01G23/053C01P2002/72C01P2004/03C01P2004/04C01P2004/24C01P2004/61
Inventor 何丹农许晓玉林琳卢军王蒙
Owner SHANGHAI JIAO TONG UNIV
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