Titanium dioxide nanosphere and applications thereof

A technology of titanium dioxide and nanospheres, which is applied in the field of nanospheres to achieve the effects of strong adsorption capacity, solution and easy loss, and easy control

Inactive Publication Date: 2010-03-24
SHANGHAI WORLD PROSPECT INT TRADE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on titanium dioxide that maintains a small particle size nanometer, high photocatalytic activity and can be separated and purified.

Method used

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  • Titanium dioxide nanosphere and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] One, 15 grams of polyethylene glycol 2000 is dissolved in the 20% hydrochloric acid solution of 1200 milliliters;

[0029] Two, the mixed solution of step one configuration is added dropwise in the titanium tetrachloride solution of 700 milliliters and obtains brown black hydrolyzate;

[0030] 3. Add 2 grams of sodium octadecyl sulfate to the hydrolyzate in step 2, maintain the temperature at 85°C, maintain the stirring speed at 300 rpm, and stir and heat for 4 hours;

[0031] 4. Heat the mixed solution in step 3 to 95°C and maintain this temperature, continue to add 800 ml of 20% hydrochloric acid solution, and add 12 ml of phosphoric acid at the same time, stir for 1 hour, cool, filter, wash with water, and get the finished product after drying. figure 1 . figure 1 It is a transmission electron micrograph of titanium dioxide nanospheres of 60-80 nanometers formed by combining titanium dioxide with a particle size of 2-8 nanometers prepared in this embodiment.

Embodiment 2

[0033] One, 15 grams of sodium polyacrylate are dissolved in the 10% hydrochloric acid solution of 3000 milliliters;

[0034] Two, the mixed solution of step one configuration is added dropwise in the titanium tetrachloride solution of 600 milliliters and obtains brown black hydrolyzate;

[0035] 3. Add 2 grams of sodium octadecyl sulfate to the hydrolyzate in step 2, maintain the temperature at 95°C, maintain the stirring speed at 350 rpm, and stir and heat for 8 hours;

[0036] 4. Heat the mixed solution in step 3 to 100°C and maintain this temperature, continue to add 900 milliliters of 10% hydrochloric acid solution, and simultaneously add 18 milliliters of phosphoric acid, stir for 3 hours, cool, filter, wash with water, and dry to obtain the finished product.

Embodiment 3

[0038] One, 15 grams of polyethylene glycol 2000 and sodium polyacrylate are dissolved in 428 milliliters of 25% hydrochloric acid solution;

[0039] Two, the mixed solution that step one configures is added dropwise in the titanium tetrachloride solution of 428 milliliters and obtains brown black hydrolyzate;

[0040] 3. Add 2 grams of sodium octadecyl sulfate to the hydrolyzate in step 2, maintain the temperature at 10°C, maintain the stirring speed at 180 rpm, and stir and heat for 2 hours;

[0041] 4. Heat the mixed solution of step 3 to 50°C and maintain this temperature, continue to add 214 milliliters of 25% hydrochloric acid solution, and simultaneously add 5 milliliters of phosphoric acid, stir for 0.5 hours, cool, filter, wash with water, and dry to obtain the finished product.

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Abstract

The invention relates to a titanium dioxide nanosphere which can be prepared by the following method comprising the following steps: (A) dissolving water-soluble organic macromolecules in a 5%-25% hydrochloric acid solution; (B) dripping the mixed solution which is prepared in step A and has the volume which is 1-5 times of the volume of titanium tetrachloride into a titanium tetrachloride solution to obtain brownish-black hydrolyzate; (C) adding a surfactant into the hydrolyzate obtained in step B; and (D) maintaining the temperature of the mixed solution obtained in step C at 50 DEG C-100 DEG C, continuously adding a 15%-20% hydrochloric acid solution according to the volume ratio, and simultaneously adding phosphoric acid, the adding amount of which is 0.1%-3% of the adding amount of the titanium tetrachloride. The invention also provides applications of the titanium dioxide nanosphere in building decoration materials and plastic materials. The invention has the advantage that the antibacterial test and the formaldehyde degrading test prove that the titanium dioxide nanosphere has stronger photocatalytic activity in the ranges of ultraviolet light and visible light.

Description

【Technical field】 [0001] The invention relates to a nanosphere, in particular to a titanium dioxide nanosphere and an application thereof. 【Background technique】 [0002] Under the irradiation of light, nano-titanium dioxide will generate electrons and holes, which will react with the water or oxygen adsorbed around it to generate superoxide free radicals. The superoxide free radicals have strong oxidative decomposition ability, which can kill bacteria and decompose Organic pollutants are therefore widely concerned by countries all over the world. [0003] The photocatalytic activity of nano-titanium dioxide is directly related to the particle size. On the one hand, as the particle size decreases, the quantum size effect of nanoparticles makes the energy levels of the conduction band and valence band become discrete energy levels, and the energy gap widens. The conduction band potential is more negative, and the valence band potential becomes more positive, which enables th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 范莉黄德音孙凯范蕾冒巍巍
Owner SHANGHAI WORLD PROSPECT INT TRADE
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