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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: 2007-10-17
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 method for preparing co-doped TiO2 nano-sol, which comprises the following steps: 1) dripping butyl titanate into absolute ethyl alcohol followed by continuous stir till the end of drip; then adding in concentrated hydrochloric acid followed by continuous stir, and then still stirring for 25-35min at the end of addition to produce blended solution; 2) dripping the above blended solution into de-ionized water with continuous stir, stirring for further 70-80min after dripping and then vibrating for 13-18min in ultrasonic wave to produce sol; 3) adding polyethylene glycol, urotropine and AgNO3 into the above sol and stirring for 55-65min to produce nano-sol. The co-doped TiO2 nano-sol prepared in the invention has the functions of Einstein shift of ultraviolet ray, photocatalysis after absorption of visible light and light source free antisepsis etc.

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 short-wavelength ultraviolet rays (λ<387nm=; this kind of short-wavelength ultraviolet rays account for about 4% of solar energy, while most of the visible light in the solar spectrum (energy accounts...

Claims

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Application Information

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Patent Type & Authority Applications(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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