Controlled preparation method of ordered titanium dioxide nano-material

A technology of titanium dioxide and nanomaterials, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of expensive titanium substrates, uncontrollable preparation of different shapes, etc., and achieve simple preparation methods, easy control of conditions, The effect of easy access to materials

Inactive Publication Date: 2014-10-29
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a method for regulating and preparing ordered titanium dioxide nanomaterials, which solves the shortcomings of the above-mentioned titanium substrates being expensive and not capable of regulating and preparing different morphologies

Method used

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  • Controlled preparation method of ordered titanium dioxide nano-material
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  • Controlled preparation method of ordered titanium dioxide nano-material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Measure 12.5ml mass fraction respectively and be that the concentrated hydrochloric acid of 37% and 12.5ml deionized water form mixed solution;

[0034] (2) Drop 2.5ml of tetra-n-butyl titanate into the above solution, and stir vigorously to mix evenly while the titanate is rapidly hydrolyzed;

[0035] (3) Put the homogeneously mixed suspension into a polytetrafluoroethylene-lined stainless steel autoclave, and conduct a hydrothermal reaction at 180° C. for 3 hours;

[0036] (4) After the reaction, the precipitated product was washed with distilled water and absolute ethanol, and then dried at 80° C. to obtain nanoclusters composed of titanium dioxide nanorods.

[0037] The product obtained in step (4) is characterized by its structure and crystal form with SEM and XRD respectively, figure 1 The TiO obtained under this reaction condition 2 Morphology of nanoclusters. It can be seen from the figure that the obtained TiO 2 Nanoclusters are composed of nanorods, an...

Embodiment 2

[0039] (1) measure the vitriol oil of 12.5ml and the deionized water of 12.5ml respectively to form mixed solution;

[0040] (2) Drop 5ml of isopropyl titanate into the above solution, and stir vigorously to make it evenly mixed while the titanate is rapidly hydrolyzed;

[0041] (3) Put the homogeneously mixed suspension into a polytetrafluoroethylene-lined stainless steel autoclave, and conduct a hydrothermal reaction at 170°C for 6 hours;

[0042] (4) After the reaction, the precipitated product was washed with distilled water and absolute ethanol, and then dried at 60° C. to obtain ordered nanoflowers composed of titanium dioxide nanorods.

[0043] The product obtained in step (4) is characterized by its structure and crystal form with SEM and XRD respectively, figure 2 The TiO obtained under this reaction condition 2 Morphology of nanoflowers. It can be seen from the figure that the obtained TiO 2 Nanoflowers are more ordered. It can be seen from the XRD pattern that...

Embodiment 3

[0045] (1) Measure the concentrated nitric acid of 5ml and 15ml deionized water respectively to form a mixed solution;

[0046] (2) Drop 3ml of tetraethyl titanate into the above solution, and stir vigorously to make it evenly mixed while the titanate is rapidly hydrolyzed;

[0047](3) Put the homogeneously mixed suspension into a polytetrafluoroethylene-lined stainless steel autoclave, and conduct a hydrothermal reaction at 180° C. for 3 hours;

[0048] (4) After the reaction, the precipitated product was washed with distilled water and absolute ethanol, and then dried at 80° C. to obtain titanium dioxide microspheres composed of titanium dioxide nanorods.

[0049] The product obtained in step (4) is characterized by its structure and crystal form with SEM and XRD respectively, image 3 The TiO obtained under this reaction condition 2 Morphology of the microspheres. It can be seen from the figure that the obtained TiO 2 The diameter of the microspheres is about 8 μm, and ...

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Abstract

The invention provides a controlled preparation method of an ordered titanium dioxide nano-material. The method comprises the following steps: preparing a mixed solution from acid and deionized water; dripping a titanium source into the mixed solution, intensively stirring to hydrolyze the titanium source quickly, and uniformly mixing the titanium source and the mixed solution; performing a hydrothermal reaction on the uniformly mixed suspension; washing precipitate with distilled water and absolute ethanol after the reaction is finished; and drying to obtain an ordered titanium dioxide nano-rod cluster, nano-flower or nano-ball. According to the preparation method, no surfactant is needed, and titanium dioxide nano-structures with different shapes and different crystal forms can be successfully prepared in an acid environment; in addition, the preparation method has the advantages of simple process and flow, wide parameter adjustable range, strong repeatability, low cost and the like.

Description

technical field [0001] The invention relates to a method for preparing inorganic nanomaterials, in particular to a method for regulating and preparing ordered titanium dioxide nanomaterials. Background technique [0002] Titanium dioxide has the characteristics of stable chemical properties, non-toxic, insoluble, and low price. In addition, titanium dioxide is also an ideal semiconductor photocatalyst, which has broad application prospects in photocatalytic degradation of pollutants in the atmosphere and water. [0003] Nano-titanium dioxide also has properties that bulk titanium dioxide does not have, such as small size effect, quantum size effect, and large specific surface area. The methods for preparing nano titanium dioxide mainly include sol-gel method, chemical vapor deposition method, alumina template method, anodic oxidation method and hydrothermal method, etc. Since the structure and morphology of the material can endow the material with some special properties, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00B82Y30/00
Inventor 胡洋何丹农林琳许晓玉王蒙何金昀陈睿哲
Owner SHANGHAI JIAO TONG UNIV
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