CN104098132A - Preparation method for {100} crystal plane anatase TiO2 nano-particles - Google Patents
Preparation method for {100} crystal plane anatase TiO2 nano-particles Download PDFInfo
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- CN104098132A CN104098132A CN201410367311.1A CN201410367311A CN104098132A CN 104098132 A CN104098132 A CN 104098132A CN 201410367311 A CN201410367311 A CN 201410367311A CN 104098132 A CN104098132 A CN 104098132A
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Abstract
The application of the invention discloses a preparation method for {100} crystal plane anatase TiO2 nano-particles. The preparation method comprises the following steps: performing hydration reaction on a titanium source to obtain hydrated TiO2 precipitation, and dispersing the hydrated TiO2 precipitation into an alkaline hydrogen peroxide solution for realizing a hydrothermal reaction so as to obtain the exposed active {100} crystal plane anatase TiO2 nano-particles, wherein the pH value of the alkaline hydrogen peroxide solution is 8-13. By the adoption of the preparation method for the {100} crystal plane anatase TiO2 nano-particles, the exposed active {100} crystal plane anatase TiO2 nano-particles of which particle sizes are less than 15 nanometers can be prepared.
Description
Technical field
The present invention relates to functional photocatalyst material preparation field, relate in particular to one and prepare { 100} crystal face Anatase TiO
2the method of nano particle.
Background technology
Titanium dioxide (TiO
2) owing to thering is the features such as abundant, nontoxic, the good stability in source, be subject to the extensive concern of industrial and scientific research circle.In the recent period, Anatase TiO
2be considered to one of optimal photocatalyst material, be widely used in photocatalysis air-cleaning and photochemical catalysis water treatment.
Anatase TiO
2photocatalysis efficiency and its size, pattern, exposure crystal face, degree of scatter, crystallinity etc. closely bound up, as a rule, little particle size has large specific surface area, can adsorb more organism, shows higher photocatalysis efficiency; Equally, the degree of scatter of particle is larger, is more conducive to the lifting of photocatalysis efficiency; In addition TiO,
2pattern directly determined that it,, to the absorbing and scattering of light of light, has determined the separation efficiency in light induced electron-hole, in general, there is the TiO of accurate one-dimentional structure pattern (as wire, tubulose, bar-shaped and spindle body shape etc.)
2conventionally show higher photocatalysis efficiency.
It is worthy of note, expose high reactivity crystal face (as 100} or 001} crystal face) Anatase TiO
2can show better photocatalysis effect.The TiO of a thermodynamically stable Anatase
2tendency forms the octahedra particle of a small amount of rescinded angle, and particle is by 8 SA { 101} and 2 highly active { 001} crystal face formations.Wherein, { the shared ratio of 101} crystal face, up to 94%,, very easily disappears due to features such as its activity is high, poor stabilities mainly due to high reactivity crystal face in the process of growth of material.Therefore, Anatase TiO
2process of growth very easily expose low activity crystal face { 101} crystal face forms octahedra particle.In the recent period, adopt fluorion as stablizer, prepare and expose a large amount of high reactivities { Anatase TiO of 001} crystal face
2micron particle, and confirm that it has higher photocatalytic activity.Subsequently, a series of research work all carry out to prepare a large amount of exposures { Anatase TiO of 001} crystal face how
2.These work comprise how increasing oarse-grained rescinded angle degree, subtract improvement of short grained particle diameter and synthetic method etc.
Have theoretical reckoner bright, { 100} crystal face is than { 101} crystal face has higher crystal face energy, and has some scholars to think that its crystal face can be also higher than { 001} crystal face.But, about exposing a large amount of high reactivities { Anatase TiO of 100} crystal face
2the synthetic report of nano particle seldom.Preparation at present exposes a large amount of high reactivities { Anatase TiO of 100} crystal face
2the method of nano particle is presoma for adopting sodium titanate nanotubes, directly to its hydrothermal conversion, exposes a large amount of { cubic column Anatase TiO of 100} crystal face to prepare to have
2nanometer rod.Aforesaid method can be prepared to have and expose a large amount of { cubic column Anatase TiO of 100} crystal face
2nanometer rod mainly due to sodium titanate nanotubes relatively stable and it decompose process in can discharge gradually hydroxide ion, play the stable { effect of 100} crystal face.The above-mentioned Anatase TiO preparing
2particle is cubic column pattern, and the particle diameter of particle is all greater than 50 nanometers.Therefore, synthetic size is less than exposure activity { the 100} crystal face Anatase TiO of 50 nanometers
2nano particle is still a technical barrier.
Summary of the invention
In view of the deficiencies in the prior art, the invention provides one and prepare { 100} crystal face Anatase TiO
2the method of nano particle, can prepare exposure activity { the Anatase TiO of 100} crystal face that grain size is less than 15 nanometers
2nano particle.
One provided by the present invention is prepared { 100} crystal face Anatase TiO
2the method of nano particle, comprising:
Titanium source is obtained to hydration TiO by hydrolysis reaction
2precipitation;
By described hydration TiO
2precipitation is dispersed in alkaline hydrogen peroxide solution carries out hydro-thermal reaction, obtains exposing active { the Anatase TiO of 100} crystal face
2nano particle; The pH value of described alkaline hydrogen peroxide solution is 8 to 13.
Preferably, in hydrogen peroxide solution, add alkali or in alkaline solution, add hydrogen peroxide and obtain described alkaline hydrogen peroxide solution.
Preferably, the pH value of described alkaline hydrogen peroxide solution is 8.5 to 10.5.
Preferably, described titanium source is selected from one or several the combination in titanium ethanolate, titanium propanolate, tetrabutyl titanate, titanium ethylene glycolate, glycerol titanium, titanium sulfate, titanyl sulfate, titanium tetrachloride, titanium tetrafluoride, ammonium titanium fluoride.
Preferably, described hydrolysis reaction generates hydration TiO for described titanium source being dispersed in to direct hydrolysis in deionized water
2precipitation, or, described hydrolysis reaction is one or more the mixing solutions in the aqueous solution of the aqueous solution by slowly add tetramethylammonium hydroxide aqueous solution, the tetraethyl ammonium hydroxide aqueous solution, the TPAOH aqueous solution, the TBAH aqueous solution, ammoniacal liquor, aqueous sodium hydroxide solution, potassium hydroxide aqueous solution, from amine to described titanium source, urea, makes the hydrolysis of titanium source generate hydration TiO
2precipitation.
Preferably, purify and obtain described hydration TiO in described titanium source after hydrolysis reaction
2precipitation; Described purification is used for removing ion, obtains the hydration TiO of purity more than 97%
2precipitation, described purification mode adopts the combination of one or several modes in washing-centrifugation, washing-membrane sepn, washing-filtration and dialysis.
Preferably, described alkali is one or more the mixture in Tetramethylammonium hydroxide, tetraethyl ammonium hydroxide, TPAOH, TBAH, ammoniacal liquor, amine substance, urea, and alkali concn is 0 to 0.1 mole every liter.
Preferably, in described alkaline hydrogen peroxide solution, the volume fraction of hydrogen peroxide is 0.5% to 8%.
Preferably, described hydration TiO
2the massfraction that precipitation is dispersed in described alkaline hydrogen peroxide solution is 0.001% to 5%.
Preferably, the temperature of described hydro-thermal reaction is 60 to 160 degrees Celsius, and the time is 1 to 48 hour.
TiO prepared by the present invention
2nano particle has high reactivity, and { 100} crystal face, spindle body shape, single-size, grain diameter can be less than that 15 nanometers, photocatalytic activity are high, good dispersity, the feature such as be difficult for reuniting, pollution-free, have good application prospect in fields such as photocatalysis air-cleaning and photochemical catalysis water treatments.
The present invention has the following advantages:
1, the TiO that the method obtains
2nano particle is spindle body shape, and grain diameter can be less than 15 nanometers, monodispersity is good;
2, the TiO that the method obtains
2nano particle exposes a large amount of high reactivities { 100} crystal face;
3, the TiO that the method obtains
2it is good that nano particle has suspension property, is difficult for the feature of reuniting;
4, the TiO that the method obtains
2photocatalysis efficiency is high, can be applicable to the field such as photocatalysis air-cleaning and photochemical catalysis water treatment.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the present invention prepares { 100} crystal face Anatase TiO
2the method flow diagram of nano particle.
Fig. 2 is that the present invention prepares { 100} crystal face Anatase TiO
2the spindle shape TiO that the method for nano particle prepares
2the scanning electron microscope (SEM) photograph of nano particle; In Fig. 2, the product that figure (a) and figure (b) obtain for embodiment 1, particle size were is 10 to 15 nanometers, length is 20 to 30 nanometers; The product that figure (c) and figure (d) obtain for embodiment 2, particle size were is 8 to 10 nanometers, length is 12 to 15 nanometers.
Fig. 3 is the spindle shape TiO that embodiment 1 prepares
2the high-resolution-ration transmission electric-lens figure of nano particle, can find out TiO by lattice fringe in figure and Fourier's electronics Transformation Graphs
2the direction of growth of particle is <001> direction, and particle side exposes a large amount of high reactivities { 100} crystal face.
Fig. 4 is the spindle shape TiO that embodiment 1 prepares
2the optical picture of nano particle, not free settling.
Embodiment
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, should belong to the scope of protection of the invention.
Please refer to Fig. 1, the one that one embodiment of the present invention provide is prepared { 100} crystal face Anatase TiO
2the method of nano particle, comprises the following steps:
Titanium source is obtained to hydration TiO by hydrolysis reaction
2precipitation;
By described hydration TiO
2precipitation is dispersed in alkaline hydrogen peroxide solution carries out hydro-thermal reaction, obtains exposing active { the Anatase TiO of 100} crystal face
2nano particle; The pH value of described alkaline hydrogen peroxide solution is 8 to 13.
Further, described alkaline hydrogen peroxide solution obtains by adding alkali in hydrogen peroxide solution or add hydrogen peroxide in alkaline solution.Described alkali can be one or more the mixture in Tetramethylammonium hydroxide, tetraethyl ammonium hydroxide, TPAOH, TBAH, ammoniacal liquor, amine substance, urea, and the concentration of described alkali can be 0 to 0.1 mole every liter.The pH value of described alkaline hydrogen peroxide solution can be 8.5 to 10.5, and in described alkaline hydrogen peroxide solution, the volume fraction of hydrogen peroxide can be 0.5% to 8%.
Further, described titanium source is selected from one or several the combination in titanium ethanolate, titanium propanolate, tetrabutyl titanate, titanium ethylene glycolate, glycerol titanium, titanium sulfate, titanyl sulfate, titanium tetrachloride, titanium tetrafluoride, ammonium titanium fluoride.
Further, described hydrolysis reaction generates hydration TiO for described titanium source being dispersed in to direct hydrolysis in deionized water
2precipitation, or, described hydrolysis reaction is one or more the mixing solutions in the aqueous solution of the aqueous solution by slowly add tetramethylammonium hydroxide aqueous solution, the tetraethyl ammonium hydroxide aqueous solution, the TPAOH aqueous solution, the TBAH aqueous solution, ammoniacal liquor, aqueous sodium hydroxide solution, potassium hydroxide aqueous solution, from amine to described titanium source, urea, makes the hydrolysis of titanium source generate hydration TiO
2precipitation.
Further, purify and obtain described hydration TiO in described titanium source after hydrolysis reaction
2precipitation; Described purification is used for removing ion, obtains the hydration TiO of purity more than 97%
2precipitation, described purification mode adopts the combination of one or several modes in washing-centrifugation, washing-membrane sepn, washing-filtration and dialysis.
Further, described hydration TiO
2the massfraction that precipitation is dispersed in described alkaline hydrogen peroxide solution is 0.001% to 5%.The temperature of described hydro-thermal reaction is 60 to 160 degrees Celsius, and the time is 1 to 48 hour.
The TiO preparing by above-mentioned present embodiment
2nano particle has high reactivity, and { 100} crystal face, spindle body shape, single-size, grain diameter can be less than that 15 nanometers, photocatalytic activity are high, good dispersity, the feature such as be difficult for reuniting, pollution-free, have good application prospect in fields such as photocatalysis air-cleaning and photochemical catalysis water treatments.
Above-mentioned present embodiment has the following advantages:
1, can find out with reference to figure 2 TiO that present embodiment obtains
2nano particle is spindle body shape, and grain diameter is less than 15 nanometers, monodispersity is good;
2, can find out with reference to figure 3 TiO that present embodiment obtains
2nano particle exposes a large amount of high reactivities { 100} crystal face;
3, can find out with reference to figure 4 TiO that present embodiment obtains
2it is good that nano particle has suspension property, is difficult for the feature of reuniting;
4, the TiO that the method obtains
2photocatalysis efficiency is high, can be applicable to the field such as photocatalysis air-cleaning and photochemical catalysis water treatment.
Embodiment 1
Under agitation condition, by 2.5 grams of titanium sulfate dispersing and dissolvings in 100 ml deionized water.Slowly drip concentration and be the Tetramethylammonium hydroxide of 0.1 mole every liter in above-mentioned solution, until solution is neutral (pH value is about 7), make titanium sulfate be hydrolyzed gradually generation hydration TiO
2precipitation.By hydration TiO
2precipitate ultrasonic dispersion, with deionized water wash repeatedly, centrifugation obtains the hydration TiO of high purity (purity is more than 97%)
2precipitation.Secondly, prepare 200 milliliters of hydrogen peroxide solutions that hydrogen peroxide volume fraction is 2%, add weak ammonia to regulate it to form the alkaline hydrogen peroxide solution that pH value is 10.5.Subsequently, by the high purity hydrous TiO after above-mentioned washing
2precipitate ultrasonic be scattered in above-mentioned pH value be 10.5 and the hydrogen peroxide volume fraction alkaline hydrogen peroxide solution that is 2% in and stir after 1 hour, in 120 degrees Celsius of lower hydro-thermal reactions 6 hours, obtain figure a and shown a large amount of active { the spindle body shape Anatase TiO of 100} crystal face of exposure of figure b in Fig. 2
2nano particle, described spindle body shape Anatase TiO
2the particle size were of nano particle is 10 to 15 nanometers, and length is about 20 to 30 nanometers.The spindle shape TiO that Fig. 3 the present embodiment prepares
2the high-resolution-ration transmission electric-lens figure of nano particle, can find out TiO by lattice fringe in figure and Fourier's electronics Transformation Graphs
2the direction of growth of particle is <001> direction, and particle side exposes a large amount of high reactivities { 100} crystal face.Fig. 4 is the spindle shape TiO that the present embodiment prepares
2the optical picture of nano particle, can find out obtained spindle shape TiO
2nano particle is free settling not.
Embodiment 2
Under agitation condition, by 2.5 grams of titanium sulfate dispersing and dissolvings in 100 ml deionized water.Slowly drip concentration and be the Tetramethylammonium hydroxide of 0.1 mole every liter in above-mentioned solution, until solution is neutral (pH value is about 7), make titanium sulfate be hydrolyzed gradually generation hydration TiO
2precipitation.By hydration TiO
2precipitate ultrasonic dispersion, with deionized water wash repeatedly, obtain highly purified hydration TiO
2precipitation, centrifugation obtains highly purified hydration TiO
2precipitation.Secondly, prepare 200 milliliters of hydrogen peroxide solutions that hydrogen peroxide volume fraction is 2%, add weak ammonia to regulate it to form the alkaline hydrogen peroxide solution that pH value is 8.5.Subsequently, by the purity after above-mentioned washing at 97% above hydration TiO
2precipitate ultrasonic be scattered in above-mentioned pH value be 8.5 and the hydrogen peroxide volume fraction alkaline hydrogen peroxide solution that is 2% in and stir 1 hour, then in 120 degrees Celsius of lower hydro-thermal reactions 6 hours, obtain a small amount of active { the spindle body shape Anatase TiO of 100} crystal face of exposure as shown in the figure c in Fig. 2 and figure d
2nano particle, can find out described Anatase TiO
2the particle diameter of nano particle is 8 to 10 nanometers, and length is about 12 to 15 nanometers.
Embodiment 3
Under agitation condition, by 5 grams of titanium sulfate dispersing and dissolvings in 100 ml deionized water.Slowly drip concentration and be the ammoniacal liquor of 0.2 mole every liter in above-mentioned solution, until solution is neutral (pH value is about 7), make titanium sulfate be hydrolyzed gradually generation hydration TiO
2precipitation.By hydration TiO
2precipitate ultrasonic dispersion, with deionized water wash repeatedly, obtain the hydration TiO of purity more than 97%
2precipitation, centrifugation.Secondly, prepare 200 milliliters of hydrogen peroxide solutions that hydrogen peroxide volume fraction is 5%, adding rare Tetramethylammonium hydroxide to regulate it to become pH value is 9 alkaline hydrogen peroxide solution.Subsequently, by washing after purity at 97% above hydration TiO
2precipitation dispersed with stirring in above-mentioned pH value be 9 and the hydrogen peroxide volume fraction alkaline hydrogen peroxide solution that is 5% in and stir after 2 hours, in 100 degrees Celsius of lower hydro-thermal reactions 8 hours, obtain exposing activity { the spindle body shape Anatase TiO of 100} crystal face
2nano particle.
Embodiment 4
Under agitation condition, by 3 grams of titanyl sulfate dispersing and dissolvings in 100 ml deionized water.Slowly drip concentration and be the ammoniacal liquor of 0.2 mole every liter in above-mentioned solution, until solution is neutral (pH value is about 7), make titanyl sulfate be hydrolyzed gradually generation hydration TiO
2precipitation.By hydration TiO
2precipitate ultrasonic dispersion, with deionized water wash repeatedly, obtain highly purified hydration TiO
2precipitation, centrifugation.Secondly, prepare 200 milliliters of hydrogen peroxide solutions that hydrogen peroxide volume fraction is 5%, adding weak ammonia to regulate its pH value is 11 formation alkaline hydrogen peroxide solution.Subsequently, by washing after purity at 97% above hydration TiO
2precipitate ultrasonic be scattered in above-mentioned pH value be 11 and the hydrogen peroxide volume fraction alkaline hydrogen peroxide solution that is 5% in and stir after 1 hour, in 80 degrees Celsius of lower hydro-thermal reactions 24 hours, obtain exposing active { the spindle body shape Anatase TiO of 100} crystal face
2nano particle.
Embodiment 5
Under agitation condition, by 3 milliliters of ultrasonic being scattered in 100 ml deionized water of titanium tetrachloride.Slowly drip concentration and be the ammoniacal liquor of 0.1 mole every liter in above-mentioned solution, until solution is neutral (pH value is about 7), make titanium tetrachloride be hydrolyzed gradually generation hydration TiO
2precipitation.By hydration TiO
2precipitate ultrasonic dispersion, with deionized water wash repeatedly, obtain highly purified hydration TiO
2precipitation, centrifugation.Secondly, prepare 200 milliliters of aqueous hydrogen peroxide solutions that hydrogen peroxide volume fraction is 3%, add weak ammonia to regulate it to form the alkaline hydrogen peroxide solution that pH value is 12.Subsequently, by the high purity hydrous TiO after washing
2precipitate ultrasonic be scattered in above-mentioned pH value be 12 and the hydrogen peroxide volume fraction alkaline hydrogen peroxide solution that is 5% in and stir after 1 hour, in 140 degrees Celsius of lower hydro-thermal reactions 4 hours, obtain exposing a large amount of activity { spindle body shape Anatase TiO of 100} crystal face
2nano particle.
Embodiment 6
Under agitation condition, 2 milliliters of ultrasonic being scattered in 100 ml deionized water of titanium isopropylate are hydrolyzed and generate hydration TiO
2precipitation, and centrifugation.Secondly, prepare 100 milliliters of hydrogen peroxide solutions that hydrogen peroxide volume fraction is 2%, add weak ammonia to regulate it to form the alkaline hydrogen peroxide solution that pH is 9.Subsequently, by above-mentioned hydration TiO
2precipitate ultrasonic be scattered in above-mentioned pH value be 9 and the hydrogen peroxide volume fraction alkaline hydrogen peroxide solution that is 2% in and stir after 1 hour, in 105 degrees Celsius of lower hydro-thermal reactions 6 hours, obtain exposing active { the spindle body shape Anatase TiO of 100} crystal face
2nano particle.
Embodiment 7
Under agitation condition, 2 milliliters of ultrasonic being scattered in 100 ml deionized water of tetrabutyl titanate are hydrolyzed and generate hydration TiO
2precipitation, and centrifugation.Secondly, prepare 100 milliliters of hydrogen peroxide solutions that hydrogen peroxide volume fraction is 0.5%, add weak ammonia to regulate it to form the alkaline hydrogen peroxide solution that pH value is 13.Subsequently, by above-mentioned hydration TiO
2precipitate ultrasonic be scattered in above-mentioned pH value be 13 and the hydrogen peroxide volume fraction alkaline hydrogen peroxide solution that is 0.5% in and stir after 1 hour, in 100 degrees Celsius of lower hydro-thermal reactions 8 hours, obtain exposing active { the spindle body shape Anatase TiO of 100} crystal face
2nano particle.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the scope of protection of present invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. prepare { 100} crystal face Anatase TiO for one kind
2the method of nano particle, is characterized in that, comprising:
Titanium source is obtained to hydration TiO by hydrolysis reaction
2precipitation;
By described hydration TiO
2precipitation is dispersed in alkaline hydrogen peroxide solution carries out hydro-thermal reaction, obtains exposing active { the Anatase TiO of 100} crystal face
2nano particle; The pH value of described alkaline hydrogen peroxide solution is 8 to 13.
2. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: in hydrogen peroxide solution, add alkali or in alkaline solution, add hydrogen peroxide obtaining described alkaline hydrogen peroxide solution.
3. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: the pH value of described alkaline hydrogen peroxide solution is 8.5 to 10.5.
4. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: described titanium source is selected from one or several the combination in titanium ethanolate, titanium propanolate, tetrabutyl titanate, titanium ethylene glycolate, glycerol titanium, titanium sulfate, titanyl sulfate, titanium tetrachloride, titanium tetrafluoride, ammonium titanium fluoride.
5. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: described hydrolysis reaction generates hydration TiO for described titanium source being dispersed in to direct hydrolysis in deionized water
2precipitation, or, described hydrolysis reaction is one or more the mixing solutions in the aqueous solution of the aqueous solution by slowly add tetramethylammonium hydroxide aqueous solution, the tetraethyl ammonium hydroxide aqueous solution, the TPAOH aqueous solution, the TBAH aqueous solution, ammoniacal liquor, aqueous sodium hydroxide solution, potassium hydroxide aqueous solution, from amine to described titanium source, urea, makes the hydrolysis of titanium source generate hydration TiO
2precipitation.
6. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: purify and obtain described hydration TiO in described titanium source after hydrolysis reaction
2precipitation; Described purification is used for removing ion, obtains the hydration TiO of purity more than 97%
2precipitation, described purification mode adopts the combination of one or several modes in washing-centrifugation, washing-membrane sepn, washing-filtration and dialysis.
7. prepare as claimed in claim 2 { 100} crystal face Anatase TiO
2the method of nano particle, it is characterized in that: described alkali is one or more the mixture in Tetramethylammonium hydroxide, tetraethyl ammonium hydroxide, TPAOH, TBAH, ammoniacal liquor, amine substance, urea, and alkali concn is 0 to 0.1 mole every liter.
8. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: in described alkaline hydrogen peroxide solution, the volume fraction of hydrogen peroxide is 0.5% to 8%.
9. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: described hydration TiO
2the massfraction that precipitation is dispersed in described alkaline hydrogen peroxide solution is 0.001% to 5%.
10. prepare as claimed in claim 1 { 100} crystal face Anatase TiO
2the method of nano particle, is characterized in that: the temperature of described hydro-thermal reaction is 60 to 160 DEG C, and the time is 1 to 48 hour.
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| CN104261465A (en) * | 2014-10-27 | 2015-01-07 | 李建明 | Method for preparing titanate, titanic acid and titanium dioxide |
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