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A kind of preparation method of water-soluble nano titanium dioxide

A nano-titanium dioxide, water-soluble technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of nano-titanium dioxide loss of catalytic degradation activity, high polymer molecular weight, loss of solubility, etc., to achieve High catalytic degradation characteristics, improved efficiency, improved dispersibility and solubility effects

Active Publication Date: 2021-02-12
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this technology is that the process is complicated, it is not easy to realize, and the production cost is high, so its application has been greatly restricted
Therefore, the development of surface-initiated polymerization technology with simple process and low cost has attracted widespread attention. However, the polymer molecular weight of surface-initiated polymerization is high and the degree of coating is high, which is easy to cause the loss of catalytic degradation activity of nano-titanium dioxide.
In addition, the coupling between the polymer chains is easy to terminate, forming a cross-linked polymer, and then losing solubility

Method used

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  • A kind of preparation method of water-soluble nano titanium dioxide
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Embodiment 1

[0030] A preparation method of water-soluble nano titanium dioxide, comprising the following steps:

[0031] S1. According to the ratio of material to liquid, nano-titanium dioxide: acrylamide: acetone = 0.1g: 3g: 30mL, take nano-titanium dioxide and place it in a tube, add acrylamide and acetone, mix and pass nitrogen gas for 3 minutes, and then seal the mouth of the tube;

[0032] S2. Place the sealed tube under ultraviolet light for 1 hour;

[0033] S3. After the illumination, the mixture in the tube was taken out and centrifuged at a speed of 8000 r / min. After the centrifugation, the precipitate was washed 4 times with absolute ethanol, and dried at 40° C. to obtain the water-soluble nano-titanium dioxide.

Embodiment 2

[0035] A preparation method of water-soluble nano titanium dioxide, comprising the following steps:

[0036] S1. According to the ratio of material to liquid, nano-titanium dioxide: acrylamide: acetone = 0.3g: 10g: 40mL, take nano-titanium dioxide and place it in a tube, add acrylamide and acetone, mix and pass nitrogen gas for 8 minutes, and then seal the mouth of the tube;

[0037] S2. Place the sealed tube under ultraviolet light for 3 hours;

[0038] S3. After the illumination, take out the mixture in the tube and centrifuge at a speed of 10,000 r / min. After centrifugation, the precipitate is washed 4 times with absolute ethanol, and dried at 80° C. to obtain water-soluble nano-titanium dioxide.

Embodiment 3

[0040] A preparation method of water-soluble nano titanium dioxide, comprising the following steps:

[0041] S1. According to the ratio of material to liquid, nano-titanium dioxide: acrylamide: acetone = 0.2g: 5g: 35mL, take nano-titanium dioxide and put it in a tube, add acrylamide and acetone, mix and pass nitrogen gas for 5 minutes, and then seal the mouth of the tube;

[0042] S2. Place the sealed tube under ultraviolet light for 2 hours;

[0043] S3. After the illumination, take out the mixture in the tube and centrifuge at a speed of 9000 r / min. After centrifugation, the sediment is washed 4 times with absolute ethanol, and dried at 60° C. to obtain water-soluble nano-titanium dioxide.

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Abstract

The invention discloses a method for preparing water-soluble nano-titanium dioxide, which comprises the following steps: S1, taking nano-titanium dioxide and placing it in a tube, adding a water-soluble monomer and a solvent, mixing and introducing nitrogen gas, and then sealing the mouth of the tube; S2, placing The sealed tube is placed under ultraviolet light and illuminated; S3. After the illumination, the mixture in the tube is taken out and centrifuged. After centrifugation, the precipitate is washed with absolute ethanol, and dried to obtain water-soluble nano-titanium dioxide. The preparation method of the water-soluble nano-titanium dioxide provided by the invention can effectively improve the dispersibility and solubility of the nano-titanium dioxide in water; at the same time, the evenly distributed titanium dioxide can effectively improve the photocatalytic efficiency. It can be used in the field of photocatalysis and solves the problem of affecting photocatalytic performance due to uneven distribution in the water phase. It has the characteristics of environmental protection and cost reduction without affecting the catalytic effect. The preparation method of the invention has simple steps, easy operation, mild preparation conditions and easy control, and high yield.

Description

technical field [0001] The invention relates to a preparation method of water-soluble nano-titanium dioxide, and specifically belongs to the technical field of nano-titanium dioxide. Background technique [0002] Environmental pollution and energy crisis are two major challenges faced by human beings in today's era. It is also an important historical mission for scientific researchers all over the world to study how to solve these two major problems. Due to their unique optical and electrochemical properties, nanomaterials have become a research hotspot in the fields of environment, chemistry and materials. Nano-TiO 2 Because of the surface effect, volume effect and Kubo effect, nano-TiO 2 While maintaining the physical and chemical properties of the original substance, it also has specific mechanical, electrical, magnetic and other singular properties. It is widely used in electronic information, cosmetics production, ultraviolet shielding, semiconductor materials, enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38
CPCB01J31/38B01J37/345B01J35/39
Inventor 王海旺张亚静王楚彤冉轩豪王柄筑张泽然彭慧君
Owner 东北大学秦皇岛分校
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