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Preparations of nano titanium dioxide particles and titania slurry

A technology of nano-titanium dioxide and titanium dioxide, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., to achieve the effect of maintaining stability, good stability and good dispersion

Inactive Publication Date: 2009-05-20
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But a big disadvantage of this method is that it is harmful to the prepared nano-TiO 2 The post-treatment of the powder is to post-treat the prepared powder. In fact, the nano-TiO 2 The particles are more or less agglomerated before coating, and it is difficult to achieve complete dispersion and coating between single particles on this basis

Method used

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  • Preparations of nano titanium dioxide particles and titania slurry
  • Preparations of nano titanium dioxide particles and titania slurry
  • Preparations of nano titanium dioxide particles and titania slurry

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Precursor configuration

[0026] At room temperature, slowly add acetic acid (concentration 6mol / L) into tetrabutyl titanate, the volume ratio of acetic acid and tetrabutyl titanate is 1:5, stir while adding, and continue stirring for 15 minutes after the addition is complete. Then, the above mixture was added into 20 volumes of deionized water under strong stirring at 600 r / min, that is, the volume ratio of acetic acid: tetrabutyl titanate: water = 1:5:20. Continue to stir the mixture solution with white precipitate for 1 h, so that the hydrolysis reaction can be completely carried out. After 1h, add 1 / 2-1 volume of 10mol / L KOH solution to it, adjust the pH value of the mixture to 13, and at the same time raise the temperature of the mixture to 80°C during the stirring process and keep it warm for 1h to form a precursor mixture for hydrothermal reaction liquid.

[0027] (2) Hydrothermal synthesis of nano-titanium dioxide

[0028] Put the precursor mixture prepar...

Embodiment 2

[0035] (1) Precursor configuration

[0036] At room temperature, glacial acetic acid (density: 1.0492g / cm 3 ) Slowly add tetrabutyl titanate (density: 0.996g / cm 3 ), the volume ratio of acetic acid and tetrabutyl titanate is 1:8, stir while adding, and continue stirring for 30 minutes after the addition is complete. Then, the above mixture was added into 30 volumes of deionized water under strong stirring at 800 r / min, that is, the volume ratio of glacial acetic acid: tetrabutyl titanate: water = 1:8:30. Continue to stir the mixture solution with white precipitate for 1 h, so that the hydrolysis reaction can be completely carried out. After 1h, add 1 / 3-1 / 2 volume of 20mol / L NaOH solution to it, adjust the pH value of the mixture to 14, and at the same time raise the temperature of the mixture to 60°C during the stirring process, and keep it warm for 1.5h to form a hydrothermal reaction precursor mixture.

[0037] (2) Hydrothermal synthesis of nano-titanium dioxide

[0038...

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Abstract

The invention relates to a nano titanium dioxide material, in particular to a preparation method of a nano titanium dioxide particle and titanium dioxide slurry. The preparation method of the nano titanium dioxide particle is characterized by including the following steps: a. slowly adding acetic acid with the volume concentration of 5-8mol / L into tetrabutyl titanate with 3-8 times of volume, fully stirring for 15 minutes to 1 hour, then adding the mixture into de-ionized water with 20-30 times of volume, and then adding an alkaline solution to regulate the PH value to be 12-14; and b. putting a precursor mixture prepared in the step a into an autoclave with a polytetrafluoro lining under the condition that the compactness is 45-70 percent, reacting for 10-24 hours at 100-135 DEG C, and washing the reactant with absolute ethyl alcohol and the de-ionized water. The preparation method realizes synthesis and coating in one step by synchronously synthesizing and organically coating the nano titanium dioxide, thereby providing a new method for confecting the titanium dioxide slurry with no agglomeration and delamination and good dispersivity and stability.

Description

technical field [0001] The invention relates to a nano-titanium dioxide material, in particular to a method for preparing nano-titanium dioxide particles and a titanium dioxide slurry. Background technique [0002] Nano-titanium dioxide is widely used in various fields such as solar cells, photocatalytic degradation, coatings, and daily cosmetics because of its good magnetic properties, catalytic properties, light absorption, electrical conductivity, hardness, and melting point, and has attracted great attention. . When nano-titanium dioxide is used, it usually needs to be mixed with some solvents, such as mixed with resin, cellulose or water to form a slurry, so whether the particles can be infiltrated with the solvent to the greatest extent, so that they can be well dispersed and form stable performance. The slurry is an important criterion to measure whether this nanomaterial is convenient for practical application. However, due to the small particle size of nano-scale ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 李少彦
Owner IRICO
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