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Method for preparing rutile titania nanoparticles

A technology of nano-titanium dioxide and rutile phase, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of complicated process, environmental pollution, and difficulty in reducing production costs, and achieve simple and easy process, convenient parameter control and long growth cycle short effect

Inactive Publication Date: 2010-06-16
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this new process has disadvantages. First, there are many raw materials and auxiliary materials that need to be used, and it also contains pollution sources such as sulfuric acid, which can easily cause environmental pollution; secondly, the process is complicated and requires multiple reactions. It must be calcined at a high temperature, resulting in energy consumption and time-consuming, and the production cost is difficult to reduce; again, the purity of the obtained product is low, failing to reach or approach 100%

Method used

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  • Method for preparing rutile titania nanoparticles
  • Method for preparing rutile titania nanoparticles
  • Method for preparing rutile titania nanoparticles

Examples

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Effect test

Embodiment 1

[0020] The specific steps of preparation are as follows: step 1, first mix polyvinylpyrrolidone with water to obtain a polyvinylpyrrolidone solution with a concentration of 0.01M, and then place the titanium sheet in the stirred polyvinylpyrrolidone solution; wherein, the polyvinylpyrrolidone The weight average molecular weight is 2000, the water is deionized water, and the purity of the titanium sheet is 99.9%. Step 2, irradiate the titanium sheet with a laser with a wavelength of 1064nm, a power of 70mJ / pulse, a frequency of 5Hz, and a pulse width of 15ns for 40 minutes to obtain a titanium dioxide colloid; wherein the laser emitting a laser with a wavelength of 1064nm is a Nd:YAG solid-state laser, and the laser The spot diameter is 1mm. In step 3, the titanium dioxide colloid was subjected to centrifugation, washing and drying; wherein, the rotating speed of the centrifugation was 13000r / min, the washing was washed twice with deionized water, and the drying was kept at 30°...

Embodiment 2

[0022] The specific steps of preparation are: step 1, first mix polyvinylpyrrolidone with water to obtain a polyvinylpyrrolidone solution with a concentration of 0.05M, and then place the titanium sheet in the stirred polyvinylpyrrolidone solution; wherein, the polyvinylpyrrolidone The weight average molecular weight is 10000, the water is distilled water, and the purity of the titanium sheet is 99.99%. Step 2, irradiate the titanium sheet with a laser with a wavelength of 1064nm, a power of 85mJ / pulse, a frequency of 8Hz, and a pulse width of 13ns for 35 minutes to obtain a titanium dioxide colloid; wherein the laser emitting a laser with a wavelength of 1064nm is a Nd:YAG solid-state laser, and the laser The spot diameter is 1.3mm. In step 3, the titanium dioxide colloid was subjected to centrifugation, washing and drying; wherein, the rotational speed during centrifugation was 13500 r / min, the washing was three times with distilled water, and the drying treatment was heat p...

Embodiment 3

[0024]The specific steps of preparation are: step 1, first mix polyvinylpyrrolidone with water to obtain a polyvinylpyrrolidone solution with a concentration of 0.1M, and then place the titanium sheet in the stirred polyvinylpyrrolidone solution; wherein, the polyvinylpyrrolidone The weight average molecular weight is 20000, the water is deionized water, and the purity of the titanium sheet is 99.9%. Step 2, irradiate the titanium sheet with a laser with a wavelength of 1064nm, a power of 100mJ / pulse, a frequency of 10Hz, and a pulse width of 10ns for 30 minutes to obtain a titanium dioxide colloid; wherein the laser emitting a laser with a wavelength of 1064nm is a Nd:YAG solid-state laser, and the laser The spot diameter is 1.5mm. In step 3, the titanium dioxide colloid was subjected to centrifugation, washing and drying; wherein, the rotational speed during centrifugation was 14000 r / min, the washing was washed twice with absolute ethanol, and the drying treatment was kept ...

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Abstract

The invention discloses a method for preparing rutile titania nanoparticles, which comprises a liquid phase method and particularly comprises the following steps: 1, mixing polyvinylpyrrolidone and water to obtain polyvinylpyrrolidone solution with the concentration between 0.01 and 0.2M, and putting a titanium plate into the polyvinylpyrrolidone solution with stirring; 2, radiating the titanium plate for 20 to 40min with laser of which the wavelength is 1,064nm, the power is between 70 and 130mJ / pulse, the frequency is between 5 and 15Hz and the pulse width is between 5 and 15ns to obtain titania colloid; and 3, centrifuging, washing and drying the titania colloid to prepare the spherical rutile titania nanoparticles of which the particle size is between 5 and 80n, wherein the weight-average molecular weight of the polyvinylpyrrolidone is between 2,000 and 40,000; the purity of the titanium plate is more than or equal to 99.9 percent; a laser emitting the laser with the wavelength of 1,064nm is a Nd:YAG solid laser; and the spot diameter of the laser is between 1 and 2mm. The method can be widely used for industrially producing the rutile titania nanoparticles on a large scale.

Description

technical field [0001] The invention relates to a preparation method of nano titanium dioxide particles, in particular to a preparation method of rutile phase nano titanium dioxide particles. Background technique [0002] Titanium dioxide (TiO 2 ) is a polymorphic compound that has three crystal structures: brookite, anatase and rutile. Among them, rutile is a thermodynamically stable structure, which has high hardness, density, dielectric constant, high refractive index, strong ultraviolet absorption rate and good chemical stability. Due to its good physical and chemical properties, rutile phase titanium dioxide is widely used in pigments, cosmetics, ceramics, environmental treatment photocatalysis, dielectric materials and other fields. [0003] Due to its small size, nano-rutile titanium dioxide has surface effect, quantum size effect and macroscopic quantum tunnel effect, so it exhibits excellent chemical corrosion resistance, photocatalytic performance and UV resistan...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 刘培生罗向东景为平戴兵
Owner NANTONG UNIVERSITY
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