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Process for preparing titanium dioxide nano-tube

A technology of titanium dioxide and nanotubes, applied in the direction of titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve the problems of long production cycle, high reaction temperature, uneven distribution of nanotube pore size, etc., and achieve short production cycle and high temperature Low and controllable pipe diameter distribution

Inactive Publication Date: 2008-08-13
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the chemical synthesis method, the hydrothermal synthesis method is often used to prepare titanium dioxide nanotubes, which must be carried out in a closed reaction kettle, and the reaction temperature is generally within the temperature range of 423K to 473K. The pore size distribution of the prepared nanotubes is uneven, and the reaction temperature is high. , long production cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare a deionized aqueous solution of ammonium polyacrylate at a molar concentration of 0.001mol / L; weigh 16.4g of analytically pure sodium hydroxide and 19g of chemically pure titanium tetrachloride at a molar ratio of 4.1:1; drop titanium tetrachloride into 200ml Form a uniform solution in deionized water containing organic additives; mix ammonia water and urea in a molar ratio of 5:1 to form a uniform buffered alkaline solution; then add 100ml of the buffered alkaline solution to the titanium-containing uniform solution and stir evenly, Ultrasonic reaction was carried out, and the ultrasonic reaction time was 10 minutes to obtain a white precipitate; after the white precipitate was washed with water and filtered, it was placed in an oven and dried for 1 hour in the range of 325K; the dried material was placed in a silicon carbide rod furnace, Heating at a heating rate of 1K / min to 573K for 1 hour and cooling with the furnace to obtain white nano-titanium dioxide pow...

Embodiment 2

[0029] Prepare a deionized aqueous solution of ammonium polyacrylate at a molar concentration of 0.1mol / L; weigh 16.4g of analytically pure sodium hydroxide and 19g of chemically pure titanium tetrachloride at a molar ratio of 4.1:1; drop titanium tetrachloride into 200ml A uniform solution is formed in deionized water containing organic additives; ammonia water and urea are mixed according to a molar ratio of 30:1 to form a uniform buffered alkaline solution; then 100ml of buffered alkaline solution is added to the titanium-containing uniform solution and stirred evenly, Ultrasonic reaction was carried out, and the ultrasonic reaction time was 120min, and a white precipitate was obtained; after the white precipitate was washed with water and filtered, it was placed in an oven and dried for 24 hours in the range of 385K; the dried material was placed in a silicon carbide rod furnace, Heating to 723K at a heating rate of 10K / min for 5 hours and then cooling with the furnace to o...

Embodiment 3

[0031] Prepare a deionized aqueous solution of ammonium polyacrylate at a molar concentration of 0.001mol / L; weigh 16.4g of analytically pure sodium hydroxide and 19g of chemically pure titanium tetrachloride at a molar ratio of 4.1:1; drop titanium tetrachloride into 200ml A uniform solution is formed in deionized water containing organic additives; ammonia water and urea are mixed according to a molar ratio of 15:1 to form a uniform buffered alkaline solution; then 100ml of buffered alkaline solution is added to the titanium-containing uniform solution and stirred evenly, Ultrasonic reaction was carried out, and the ultrasonic reaction time was 60 minutes to obtain a white precipitate; after the white precipitate was washed with water and filtered, it was placed in an oven and dried for 6 hours in the range of 315K; the dried material was placed in a silicon carbide rod furnace, Heating to 623K at a heating rate of 5K / min for 1h to 5h, then cooling with the furnace to obtain ...

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Abstract

The present invention provides a titanium dioxide nanotube and its preparing method. The method is first dripping titanium tetrachloride in de-ionized water containing organic additive to form homogeneous solution; then mixing to homogeneous buffer alkaline solution according to a certian mol ratio of ammonia and urea, adding the solution in homogeneous solution containing titanium to proceed ultrasonical reaction after being mixed; the nano titanium dioxide powder obtained by preheating reactant which granularity is homogeneous; then mixing nano titanium dioxide powder and NaOH solution containing organic additive, placing in reactor, processing kaline ultrasonical reaction, then obtaining titanium dioxide nanotube after being dried. The titanium dioxide nanotube has a simple process, convenient operation, the diameter of the titanium dioxide nanotube is homogeneous.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide nanotubes, which belongs to the field of fine chemicals, and in particular relates to the technical field of nanomaterial preparation. technical background [0002] Titanium dioxide (TiO2) is a non-toxic, inexpensive, chemically stable, high-refractive index, corrosion-resistant and weather-resistant multifunctional oxide material, widely used in advanced coatings, cosmetics, sensors, bioengineering, high Molecular materials, catalytic materials and secondary batteries and other fields. Nano-titanium dioxide has a wide range of application prospects because the particle size is between molecules, atoms and bulk materials, and the existence of a large number of grain boundaries makes it have significant surface effects, volume effects, and small size effects. [0003] Titanium dioxide nanotubes are a new form of titanium dioxide. For the preparation methods of titanium dioxide nanotubes, ...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82B3/00
Inventor 谭强强袁章福张军玲熊绍锋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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