Water-soluble titanium dioxide and preparation method thereof

A titanium dioxide, water-soluble technology, applied in the field of water-soluble titanium dioxide and its preparation, can solve the problems of uneven dispersion, titanium dioxide precipitation, affecting nanoparticles, etc., and achieve the effects of stable sol system, high energy efficiency, and difficult precipitation.

Pending Publication Date: 2019-08-16
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the traditional preparation process of nano-titanium dioxide powder, due to the large specific surface area and high surface energy of nano-titanium dioxide particles, the van der Waals attraction and Coulomb force between particles, the mutual agglomeration of particles reduces the total surface area and surface free energy.
Nanoparticles are very easy to agglomerate, easy to form secondary particles, forming soft and hard agglomerates, and the particle size of the secondary particles reache

Method used

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  • Water-soluble titanium dioxide and preparation method thereof
  • Water-soluble titanium dioxide and preparation method thereof
  • Water-soluble titanium dioxide and preparation method thereof

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preparation example Construction

[0033] A kind of preparation method of water-soluble titanium dioxide provided by the invention specifically comprises the following steps:

[0034] Step 1, preparing a titanium compound solution with a concentration of 5-50wt% (weight percent);

[0035] Step 2, uniformly mix the titanium compound solution, alcohol, inorganic acid and organic acid to obtain a mixed solution, wherein the volume ratio of titanium compound solution: alcohol: inorganic acid: organic acid is 2-10:4:1-2:2- 3;

[0036] Step 3, stirring the mixed solution in step 2 at 90-130° C. for 30-120 minutes to obtain a heat treatment solution;

[0037] Step 4, add deionized water and alcohol to the heat treatment solution in step 3, and mix well to obtain an alcohol treatment solution, wherein the volume ratio of deionized water:alcohol:the titanium compound solution is 1-5:1-3:1 ~5;

[0038] Step 5, adding a modifier to the alcohol treatment solution in step 4, stirring for 30-60 minutes to obtain a dispers...

Embodiment 1

[0049] A preparation method of water-soluble titanium dioxide, specifically comprising the following steps:

[0050] Step 1, the preparation concentration is the titanium tetrachloride solution of 5wt%;

[0051] Step 2, take 10ml of titanium tetrachloride solution, 20ml of ethylene glycol, 5ml of perchloric acid and 10ml of oxalic acid, and mix them evenly to obtain a mixed solution;

[0052] Step 3, stirring the mixed solution in step 2 at 90°C for 120 minutes to obtain a heat treatment solution;

[0053] Step 4, add 10ml of deionized water and 10ml of ethylene glycol to the heat treatment solution in step 3, and mix well to obtain the alcohol treatment solution;

[0054] Step 5, add alanine to the alcohol treatment solution in step 4, stir for 45min to obtain a dispersion, wherein 0.1g of alanine is added to every 100mL alcohol treatment solution;

[0055] Step 6: Stir the dispersion in step 5 at 120°C for 13 days, then add 20ml of ethylene glycol to obtain a sol;

[0056] ...

Embodiment 2

[0058] A preparation method of water-soluble titanium dioxide, specifically comprising the following steps:

[0059] Step 1, the preparation concentration is the titanium sulfate solution of 8wt%;

[0060] Step 2, take 30ml of titanium sulfate solution, 20ml of diethanol, 5ml of periodic acid and 15ml of citric acid, and mix them evenly to obtain a mixed solution;

[0061] Step 3, placing the mixed solution in step 2 at 130°C and stirring for 30 minutes to obtain a heat treatment solution;

[0062] Step 4, add 30ml of deionized water and 15ml of diethanol to the heat treatment solution in step 3, and mix well to obtain the alcohol treatment solution;

[0063] Step 5, adding glycine to the alcohol treatment solution in step 4, stirring for 60 minutes to obtain a dispersion, wherein 3g of glycine was added to every 100mL alcohol treatment solution;

[0064] Step 6, place the dispersion in step 5 at 120°C and stir for 14 days, then add 40ml of diethanol to obtain a sol;

[006...

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Abstract

The invention discloses a method for preparing water-soluble titanium dioxide. The method comprises the following steps: 1) preparing a titanium compound solution with the concentration of 5-50 wt%; 2) uniformly mixing the titanium compound solution, alcohol, inorganic acid and organic acid to obtain a mixed solution; 3) stirring the mixed solution at 90-130 DEG C to obtain a heat treatment solution; 4) adding deionized water and alcohol into the heat treatment solution, and uniformly mixing all the components to obtain an alcohol treatment solution; 5) adding a modifier into the alcohol treatment liquid to obtain a dispersion liquid; 6) stirring the dispersion liquid at 120-150 DEG C, and then adding alcohol to obtain sol; 7) drying and grinding the sol to obtain the water-soluble titanium dioxide. According to the method, subsequent calcination and addition of a dispersing agent are not needed, the prepared water-soluble titanium dioxide is directly dispersed in water to form a transparent sol, the dispersity is good, and a film formed by the prepared water-soluble titanium dioxide and a water-based coating prepared from the water-soluble titanium dioxide have photocatalytic properties.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide preparation, and in particular relates to a water-soluble titanium dioxide and a preparation method thereof. Background technique [0002] The stable dispersion mechanism of nanoparticles in liquid medium is determined by the interaction between nanoparticles. It includes four aspects: the intermolecular van der Waals attraction; the electric double layer force generated between the particles with the same charge, which is generally expressed as repulsion; the steric hindrance formed by the surfactant or polymer adsorbed on the particle surface; The solvating force generated by the hydration molecules on the particle surface is weak and can be either attractive or repulsive depending on the nature of the surface and the arrangement of the solvent. The mutual magnitude of the above four forces determines the dispersion stability of the system. Among them, electrostatic stabilization and ...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06B01J13/00
CPCB01J13/0047B01J21/063B01J35/004C01G23/053C01G23/0532C01G23/0536
Inventor 王剑峰张守恒郭国伟王娜娜董贺新卫冬燕芦天亮张亚非韩丽徐军
Owner ZHENGZHOU UNIV
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