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Codoping titanium dioxide nano sol and preparation method thereof

A nano-sol and titanium dioxide technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems affecting adsorption and photocatalytic performance, affecting matrix pore structure and characteristics, etc.

Inactive Publication Date: 2009-09-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the matrix itself is a porous structure, the film or coating will affect the pore structure and characteristics of the matrix itself to a certain extent; while nano-TiO 2 The powder may also be agglomerated due to surface effects, which affects its adsorption and photocatalytic performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, a kind of co-doped titania nano sol, the specific preparation method is as follows:

[0015] 1), 10 milliliters of butyl titanate (Ti(OC 4 h 9 ) 4 ) into 30 ml of absolute ethanol (C 2 h 5 OH), keep stirring until the dropwise addition is complete; then slowly add 2 ml of concentrated hydrochloric acid dropwise at a rate of 1-2 drops per second, keep stirring during the dropwise addition, and continue to stir for 30 minutes after the dropwise addition , to obtain a mixed solution;

[0016] 2) Add the mixed solution dropwise to 50 ml of deionized water at a rate of 1-2 drops per second, stir continuously during the dropwise addition, continue to stir for 75 minutes after the dropwise addition, and then oscillate with 45W ultrasonic waves for 15 minutes to obtain light Yellow clear sol;

[0017] 3), directly add polyethylene glycol (PEG), hexamethylenetetramine (C 6 h 12 N 4 ), silver nitrate (AgNO 3 ), and then stirred for 60 minutes to obtain a c...

Embodiment 2

[0019] Embodiment 2, a kind of co-doped titania nano sol, the specific preparation method is as follows:

[0020] 1), 10 milliliters of butyl titanate (Ti(OC 4 h 9 ) 4 ) into 30 ml of absolute ethanol (C 2 h 5 OH), keep stirring until the dropwise addition is complete; then slowly add 2 ml of concentrated hydrochloric acid dropwise at a rate of 1-2 drops per second, keep stirring during the dropwise addition, and continue to stir for 30 minutes after the dropwise addition , to obtain a mixed solution;

[0021] 2) Add the mixed solution dropwise to 50 ml of deionized water at a rate of 1-2 drops per second, stir continuously during the dropwise addition, continue to stir for 75 minutes after the dropwise addition, and then oscillate with 45W ultrasonic waves for 15 minutes to obtain light Yellow clear sol;

[0022] 3), directly add polyethylene glycol (PEG), hexamethylenetetramine (C 6 h 12 N 4 ), silver nitrate (AgNO 3 ), and then stirred for 60 minutes to obtain a c...

Embodiment 3

[0024] Embodiment 3, a kind of co-doped titania nano sol, the specific preparation method is as follows:

[0025] 1), 10 milliliters of butyl titanate (Ti(OC 4 h 9 ) 4 ) into 30 ml of absolute ethanol (C 2 h 5 OH), keep stirring until the dropwise addition is complete; then slowly add 2 ml of concentrated hydrochloric acid dropwise at a rate of 1-2 drops per second, keep stirring during the dropwise addition, and continue to stir for 30 minutes after the dropwise addition , to obtain a mixed solution;

[0026] 2) Add the mixed solution dropwise to 50 ml of deionized water at a rate of 1-2 drops per second, stir continuously during the dropwise addition, continue to stir for 75 minutes after the dropwise addition, and then oscillate with 45W ultrasonic waves for 15 minutes to obtain light Yellow clear sol;

[0027] 3), directly add polyethylene glycol (PEG), hexamethylenetetramine (C 6 h 12 N 4 ), silver nitrate (AgNO 3 ), and then stirred for 60 minutes to obtain a c...

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Abstract

The invention discloses a preparation method of co-doped titanium dioxide nano sol, which comprises the following steps: 1) adding butyl titanate dropwise into absolute ethanol and stirring continuously until the addition is completed; then adding concentrated hydrochloric acid dropwise and continuously Stir, and continue to stir for 25-35 minutes after the dropwise addition to obtain a mixed solution; 2) Add the above-mentioned mixed solution dropwise to deionized water and keep stirring, continue to stir for 70-80 minutes after the dropwise addition, and then ultrasonically oscillate for 13-18 minutes 3) adding polyethylene glycol, hexamethylenetetramine and silver nitrate to the above-mentioned sol and stirring for 55-65 minutes to obtain a nano-sol. The co-doped titanium dioxide nano sol prepared by the method of the invention has the functions of realizing red shift of ultraviolet light, photocatalysis caused by visible light absorption, antibacterial without light source and the like.

Description

technical field [0001] The invention relates to a co-doped titanium dioxide nano sol and a preparation method thereof. Background technique [0002] Titanium dioxide (TiO 2 ) is the most practical photocatalyst, which is widely used in the photolysis of water to produce hydrogen and photoself-cleaning; its advantages are: 1) It has good chemical stability and will not be eroded by most acids, bases, and organic solvents; 2) TiO 2 Generally, there is no poisoning phenomenon that leads to its inactivation. In addition, nano-TiO 2 It fully reflects the quantum size effect, surface effect, volume effect and macroscopic quantum tunneling effect, so it has good photocatalytic performance. However, due to TiO 2 is a wide bandgap semiconductor (E g =3.2eV), can only respond to the short-wavelength ultraviolet part (λ<387nm); this kind of short-wavelength ultraviolet part accounts for about 4% of solar energy, and the visible light part accounts for most of the solar spectru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047B01J21/06C02F1/30
Inventor 杨辉郭兴忠戴嘉璐高基伟
Owner ZHEJIANG UNIV
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