Preparation of titanium dioxide nano-rod

A titanium dioxide and nanorod technology, applied in the directions of titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve the problems of short reaction time, uneven length of titanium dioxide nanomaterials, long reaction time, etc. The effect of high absorbance, length-to-diameter ratio

Active Publication Date: 2011-05-18
江苏杰创企业管理有限公司
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the inhomogeneous length of titanium dioxide nanomaterials prepared by the hydrothermal synthesis method in the prior art, and the defects of high pressure conditions and long reaction time are required, and to provide a uniform preparation with short reaction time under normal pressure. A method for titania nanorods

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  • Preparation of titanium dioxide nano-rod
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  • Preparation of titanium dioxide nano-rod

Examples

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preparation example Construction

[0014] The preparation method of titanium dioxide nanorods provided by the present invention, wherein, the method comprises heating the mixture containing titanium dioxide nanoparticles, alkali metal hydroxides and organic solvents to 80-120°C and then contacting with a surfactant, said titanium dioxide nanorods containing The time interval between the start of heating the mixture of particles, alkali metal hydroxide and organic solvent to 80°C and the start of contacting the mixture containing titanium dioxide nanoparticles, alkali metal hydroxide and organic solvent with the surfactant does not exceed 5 minutes, the organic solvent is an organic solvent with a boiling point not higher than 85°C and capable of dissolving the alkali metal hydroxide, and the heating method is microwave heating.

[0015] In a strong alkaline solution, titanium dioxide nanocrystals dissociate and fall off along their crystal planes to form nanochips. At a temperature of about 80 °C, the nanochips...

Embodiment 1

[0025] This example is used to illustrate the preparation method of the titanium dioxide nanorods of the present invention.

[0026]Add 5 grams of anatase-type titanium dioxide nanoparticles with a particle diameter of 30 nm to 50 ml of sodium hydroxide ethanol solution with a concentration of 10 mol / liter, and use an ultrasonic instrument to sonicate the titanium dioxide nanoparticles to disperse evenly. Put the whole system into a microwave reactor, adjust the microwave wavelength to 123 mm, and when the temperature of the solution rises to 90 ° C, under the condition of rapid stirring, add 3 ml of oleic acid dropwise at a constant speed, and the dropwise addition is completed within 3 minutes. Wherein, it takes about 0.5 minutes for the temperature of the solution to rise from 80°C to about 90°C. After the dropwise addition was completed, the reaction was continued at 90° C. for 60 minutes. After the reaction, the reaction solution was left to stand at 20°C for 2 hours, fi...

Embodiment 2

[0028] This example is used to illustrate the preparation method of the titanium dioxide nanorods of the present invention.

[0029] Carry out according to the method for embodiment 1, difference is, the sodium hydroxide ethanolic solution of 10 mol / liter replaces with the potassium hydroxide carbon tetrachloride solution of 8 mol / liter, and the consumption of potassium hydroxide carbon tetrachloride solution is 60 milliliters; the particle diameter of titanium dioxide nanoparticles is 10 nanometers, and its dosage is 5 grams; the microwave wavelength is 100 millimeters, the reaction temperature is 80° C., and the reaction time is 80 minutes. Oleic acid was replaced by cetyltrimethylammonium bromide in a volume of 5 ml.

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Abstract

The invention provides a preparation method for titanium dioxide nanorods. The method comprises the following steps: heating a mixture containing titanium dioxide nano particles, an alkali metal hydroxide and an organic solvent to between 80 and 120 DEG C, and contacting the mixture with a surfactant, wherein the step of contacting the mixture with the surfactant is carried no more than 5 minuteslater that the step of heating a mixture containing titanium dioxide nano particles, an alkali metal hydroxide and an organic solvent to between 80 and 120 DEG C, the organic solvent is an organic agent which has a boiling point below 85 DEG C and can dissolve the alkali metal hydroxide and the heating mode is heating by microwaves. The preparation method can quickly prepare at normal pressure titanium dioxide nanorods which are uniform in length and small in diameter.

Description

technical field [0001] The invention relates to a preparation method of titanium dioxide nanorods. Background technique [0002] Since the discovery of carbon nanotubes in 1991, low-dimensional nanomaterials such as wire, ribbon, rod and tube nanomaterials have attracted much attention due to their unique properties and potential applications in nanodevices. Low-dimensional nanomaterials have broad application prospects in the fields of optics, electronics and medicine. The strong oxidation, chemical stability and non-toxicity of nano-titanium dioxide make nano-titanium dioxide a photocatalyst with great development potential in environmental purification. [0003] At present, the preparation methods of titanium dioxide nanorods mainly include the template method. The disadvantage of this method is that the template needs to be removed by chemical methods after the preparation is completed. Sol-gel method, as CN 101045556 discloses a kind of method that adopts electric fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B3/00C01G23/047
Inventor 张璐璐许静杨柳谭伟华林宏业宫清
Owner 江苏杰创企业管理有限公司
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