A controlled preparation method of ordered titanium dioxide nanomaterials

A titanium dioxide and nanomaterial technology, applied in the directions of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of expensive titanium substrates, uncontrollable preparation of different morphologies, etc., achieving convenient post-processing and strong repeatability , the effect of easy availability of materials

Inactive Publication Date: 2016-09-07
SHANGHAI JIAOTONG 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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  • A controlled preparation method of ordered titanium dioxide nanomaterials
  • A controlled preparation method of ordered titanium dioxide nanomaterials
  • A controlled preparation method of ordered titanium dioxide nanomaterials

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 evenly mixed suspension into a PTFE-lined stainless steel autoclave, and perform a hydrothermal reaction at 180°C for 3 hours;

[0048] (4) After the reaction, the precipitated product is 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) was characterized by SEM and XRD for its structure and crystal form, respectively, image 3 TiO obtained for this reaction condition 2 Morphology of the microspheres. As can be seen from the figure, the obtained TiO 2 The diameter of the microspheres is about 8 μm, and the microspheres are also made of TiO ...

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Abstract

The invention provides a control preparation method of ordered titanium dioxide nanomaterials, comprising the following steps: forming a mixed solution with acid and deionized water; dropping a titanium source into the above mixed solution, and stirring vigorously while the titanium source is rapidly hydrolyzed. Mix uniformly; carry out hydrothermal reaction on the uniformly mixed suspension; after the reaction, the precipitated product is washed with distilled water and absolute ethanol, and then dried to obtain ordered titanium dioxide nanorod clusters, nanoflowers or nanospheres. The preparation method does not require any surfactant, and titanium dioxide nanostructures with different shapes and crystal forms can be successfully prepared only in an acidic environment; and the method has the advantages of simple process and process, wide adjustable range of parameters, and repeatability. Strong, low cost and other advantages.

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 Patents(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 JIAOTONG UNIV
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