CN101229957A - SiO2/TiO2 hollow compound structural material as well as preparation method and uses thereof - Google Patents
SiO2/TiO2 hollow compound structural material as well as preparation method and uses thereof Download PDFInfo
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- CN101229957A CN101229957A CNA2007101160366A CN200710116036A CN101229957A CN 101229957 A CN101229957 A CN 101229957A CN A2007101160366 A CNA2007101160366 A CN A2007101160366A CN 200710116036 A CN200710116036 A CN 200710116036A CN 101229957 A CN101229957 A CN 101229957A
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Abstract
The invention relates to a hollow material with a composite structure of SiO2/TiO2 and a preparation method and application thereof. By applying hydrothermal reaction, glucose solution is carbonized at 160 to 200 DEG C to obtain carbon nanometer spheres with a particle size of 200nm to 1um; the carbon nanometer spheres are used as hard templates; hydrolysis of ethyl orthosilicate and tetrabutyl titanate are used for wrapping the SiO2 and TiO2 on the surfaces of the carbon spheres; the obtained product is annealed for an hour at the temperature of 450 to 500 DEG C; the carbon spheres are removed, and the hollow structure of silicon dioxide/titanium dioxide is obtained; then the obtained product is prepared into membranes with different layers by applying a czochralski method and a spin coating method respectively. The method is reasonable in design and simple in technology; besides, the hollow structure has even size-distribution and controllable particle size; the hollow silicon dioxide can remarkably improve the transmission rate of the membranes; the composite membranes are widely applied to fields such as windshields, various lenses and agricultural greenhouses.
Description
Technical field
The present invention relates to a kind of SiO
2/ TiO
2Hollow compound structural material and preparation method thereof and application belong to the inorganic nano material preparing technical field.
Background technology
People such as the Fujishima of Tokyo University discover, TiO
2Under solar light irradiation, TiO
2After UV-irradiation, light induced electron and hole make TiO respectively
2The hydrogen reduction of surface adsorption and water oxidation generate O
2With the OH active group, these active groups are enough to make the organic dirt of glass surface, and microorganism and bacterial degradation are inorganicss such as carbonic acid gas and water, thereby reach self-cleaning purpose.1972, people such as the Wang of Tokyo University and Fujishima are in Nature (Nature, 1972,238,37.) on reported that the titania surface under UV light-induced produces the phenomenon of Superhydrophilic, promptly without UV-irradiation the time, the contact angle of water droplet and titania surface has tens degree big, and under UV-irradiation, contact angle reduces gradually, when the irradiation time sufficiently long, contact angle can approach zero degree, reaches super hydrophily.The titanium dioxide film that reaches super water-based after the UV-irradiation is placed under dark condition, and its contact angle can go up, and can make titania surface present super hydrophilic phenomenon once more after the reirradiation UV-light.
TiO
2Photic hydrophilic discovery has enlarged its Application Areas especially.This super hydrophilic phenomenon and TiO
2Other characteristic combinations such as photocatalysis Decomposition organism make TiO
2Have broad application prospects the extremely concern of scientific circles and business circles at aspects such as water treatment, purifying air, glass curtain wall, agriculture greenhouse, various eyeglass, windshield glass and traffic signs.For example along with the increase of the continuous high stratification of buildings and widely-used glass curtain wall and environomental pollution source, the cleaning of building glass has become very consuming time and dangerous work, thus self-cleaning glass oneself become the focus that people pay close attention to.The exploitation of self-cleaning glass in the past is to coat fluorine-containing macromolecule membrane at glass surface, and its surface has hydrophobic nature or ultraphobic water-based, but thermotolerance and weathering resistance existing problems.The coating of titanium dioxide self-cleaning glass of Chu Xianing is as novel ecological architectural material in recent years, and its development prospect is very good.Some scientific and technological developed countries have carried out the research of anti-mist and automatically cleaning material, and now oneself has successfully developed the anti-mist film of the PET that is used for auto mirror as Japan, does not need printing opacity compartment walls, roadside label or the billboard extraneous adornment ceramic tile of clean and maintenance; Body of a motor car Superhydrophilic coating begins to be used for the coating service of service station in May, 1998, and the vehicle body super-hydrophilic coating has the self-purification effect, can reduce car washing water 90%.
But TiO
2Light urge activity to transit to conduction band when electronics has valence band through UV-irradiation, could obtain after forming electron-hole pair; After stopping illumination for some time, its surface returns to hydrophobic state again, makes TiO
2Application be subjected to very big restriction.The titanium dioxide optical catalyst that uses only reaches 3%-5% to the utilization ratio of daylight luminous energy at present, and spectrum how to widen titanium dioxide optical catalyst utilizes scope to become the difficult problem of pendulum in face of people with utilization ratio.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of reasonable in design, the simple SiO of technology
2/ TiO
2The preparation method of hollow compound structural material, and utilize spin-coating method or crystal pulling method that the gained material preparation is become SiO
2/ TiO
2The hollow compound structural material film is applied to fields such as windshield glass, various eyeglass and agriculture greenhouse.
The preparation method of above-mentioned composite structure is to be hard template with the Nano carbon balls, and the hydrolysis that utilizes tetraethoxy and tetrabutyl titanate is at carbon ball surface coated Si O
2And TiO
2, high temperature annealing removes the carbon elimination ball, obtains the SiO of hollow structure
2/ TiO
2
A kind of SiO
2/ TiO
2Hollow compound structural material is characterized in that, is made by following steps, and wherein, when weight part unit was gram, parts by volume unit was a milliliter; When weight part unit was kilogram, parts by volume unit was for rising:
1) preparation Nano carbon balls
Take by weighing the glucose of 4～8 weight parts, be dissolved in the water of 40 parts by volume, change in the stainless steel cauldron of inner liner polytetrafluoroethylene, the capping still places thermostat internal reaction 4～12h of 160 ℃～200 ℃, after reaction finishes, naturally cool to room temperature, product in the still is inclined to, and is under 10000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, 60 ℃ of vacuum-drying 4h obtain single dispersed carbon nanometer ball of particle diameter 200nm～1um;
2) Nano carbon balls surface coated silica
Take by weighing the Nano carbon balls that makes by step (1) of 0.05～0.1 weight part, be dispersed in the ethanol and 4～8 parts by volume water blended solution by 20～40 parts by volume, add 0.5～1.5 parts by volume ammoniacal liquor, ultra-sonic dispersion 20～40min dropwise adds tetraethoxy 0.5～1.0 parts by volume, stir 2～20h under the room temperature, at rotating speed is under 8000 rev/mins, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, obtain C/SiO
2Nanometer ball;
3) C/SiO
2/ TiO
2The preparation of composite structure
The C/SiO that step (2) is made
2After the nanometer ball drying, be scattered in the mixed solution of forming by 50～100 parts by volume dehydrated alcohols and 0.5～1 parts by volume water, ultrasonic 30min, the mixing solutions that dropwise adds 0.5～1 parts by volume tetrabutyl titanate and 7～14 parts by volume dehydrated alcohols, magnetic agitation 1h is under 8000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate at 60 ℃ of vacuum-drying 4h, promptly gets C/SiO
2/ TiO
2Sandwich;
4) SiO
2/ TiO
2The acquisition of hollow compound structural material
The C/SiO that step 3) is made
2/ TiO
2Sandwich obtains SiO at 500 ℃ of annealing 0.5～1.5h
2/ TiO
2Hollow compound structural material.
Thermostat described in the step 1) is the baking oven of energy accurate temperature controlling or the resistance furnace of energy accurate temperature controlling.
Step 2), 3) described dispersing method is a kind of in dispersed with stirring method or the ultra-sonic dispersion method, described water is deionized water.
A kind of SiO
2/ TiO
2The application of hollow compound structural material is characterized in that, is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
SiO
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in solvent be 0.4% solution, be substrate with common slide glass, utilize spin-coating method or crystal pulling method, preparation 1～10 layer film.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 0.5～1.5h
2/ TiO
2The hollow compound structural material film.
Crystal pulling method described in the step 1) or spin-coating method are operated on vertical pulling machine or spin coating instrument.
Described solvent is water or ethanol or the ethanolic soln that adds high molecular polymer.
Described high molecular polymer comprises polyoxyethylene glycol, polyethylene pyrrole sieve alkane ketone.
Step 2) annealing described in is operated on retort furnace that can accurate temperature controlling or resistance furnace.
Above reactions steps is this area normal experiment reaction conditions if no special instructions.
Compared with prior art, TiO
2With SiO
2It is the method for hard template that the preparation of composite structure has been adopted with the Nano carbon balls, has obtained the SiO of hollow structure
2/ TiO
2, the monodispersity of product is good, and size distribution is even, and grain size can be controlled flexibly by the particle diameter that changes the carbon ball.
The pattern of sample is observed (acceleration voltage 100kV) with transmission electron microscope (TEM) Hitachi model H-700.Fig. 2 is the transmission electron microscope photo of Nano carbon balls, and as seen from the figure, the Nano carbon balls size is even, good dispersity, and diameter is about 400nm.Fig. 3 is the transmission electron microscope photo of gained hollow compound structural, and diameter and Nano carbon balls are approaching.
Compare SiO with common titanium dioxide nano-film
2/ TiO
2The performance of hollow compound structural material film is more superior, and making method is simple, and cost is more cheap.Silicon-dioxide has high transmittance, and its hollow structure forms effective resonator under visible light radiation, can greatly improve the utilization ratio of visible light.Fundamentally solved the little difficult problem of spectrum utilization ratio of titanium dioxide optical catalyst, obtained having photocatalysis performance, the laminated film that gathers multi-function in integral whole of Superhydrophilic and high transmission rate.
This film has at aspects such as windshield glass, various eyeglass and agriculture greenhouses widely to be used.
SiO among the present invention
2/ TiO
2The hollow compound structural material preparation method also is applicable to the preparation method of other metal oxide and silicon-dioxide composite hollow structure, is the pervasive synthetic method of a kind of metal oxide and silicon-dioxide composite hollow structure.
Description of drawings
Fig. 1 is preparation flow figure of the present invention.
Fig. 2 is the transmission electron microscope photo of Nano carbon balls.
Fig. 3 is the SiO that the present invention makes
2/ TiO
2The transmission electron microscope photo of hollow compound structural material.
Embodiment
Below in conjunction with embodiment the present invention is further elaborated, but protection domain of the present invention is only for therewith, wherein, when weight part unit during for gram, parts by volume unit be milliliter; When weight part unit was kilogram, parts by volume unit was for rising, and reactions steps is this area normal experiment reaction conditions if no special instructions among the embodiment:
Embodiment 1:
A kind of SiO
2/ TiO
2Hollow compound structural material is made by following steps,
1) preparation Nano carbon balls
Take by weighing 4 weight part glucose, be dissolved in the water of 40 parts by volume, change in the stainless steel cauldron of inner liner polytetrafluoroethylene, the capping still places 160 ℃ resistance furnace internal reaction 12h, after reaction finishes, naturally cool to room temperature, product in the still is inclined to, and is under 10000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, 60 ℃ of vacuum-drying 4h obtain single dispersed carbon nanometer ball of particle diameter 200nm;
2) Nano carbon balls surface coated silica
Take by weighing the Nano carbon balls that makes by step (1) of 0.05 weight part, be dispersed in the ethanol and 4 parts by volume water blended solution by 20 parts by volume, add 1.5ml ammoniacal liquor, ultra-sonic dispersion 30min dropwise adds tetraethoxy 0.5 parts by volume, stir 2h under the room temperature, at rotating speed is under 8000 rev/mins, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, obtain C/SiO
2Nanometer ball;
3) C/SiO
2/ TiO
2The preparation of composite structure
The C/SiO that step (2) is made
2After the nanometer ball drying, be scattered in the mixed solution of forming by 50 parts by volume dehydrated alcohols and 1 parts by volume water, ultrasonic 30min, the mixing solutions that dropwise adds 1 parts by volume tetrabutyl titanate and 7 parts by volume dehydrated alcohols, magnetic agitation 1h is under 8000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate at 60 ℃ of vacuum-drying 4h, promptly gets C/SiO
2/ TiO
2Sandwich;
4) SiO
2/ TiO
2The acquisition of hollow compound structural material
The C/SiO that step 3) is made
2/ TiO
2Sandwich obtains SiO at 500 ℃ of annealing 1.5h
2/ TiO
2Hollow compound structural material.
Embodiment 2:
A kind of SiO
2/ TiO
2The application of hollow compound structural material is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
Will be by the SiO of embodiment 1 preparation
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in water be 0.4% solution, be substrate with common slide glass, utilize vertical crystal pulling method, prepare 1 layer film.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 1h
2/ TiO
2The hollow compound structural material film.
Embodiment 3:
A kind of SiO
2/ TiO
2Hollow compound structural material is made by following steps,
1) preparation Nano carbon balls
Take by weighing 8 weight part glucose, be dissolved in the water of 40 parts by volume, change in the stainless steel cauldron of inner liner polytetrafluoroethylene, the capping still places 200 ℃ resistance furnace internal reaction 4h, after reaction finishes, naturally cool to room temperature, product in the still is inclined to, and is under 10000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, 60 ℃ of vacuum-drying 4h obtain single dispersed carbon nanometer ball of particle diameter 200nm;
2) Nano carbon balls surface coated silica
Take by weighing the Nano carbon balls that makes by step (1) of 0.1 weight part, be dispersed in the ethanol and 8 parts by volume water blended solution by 40 parts by volume, add 1.5ml ammoniacal liquor, ultra-sonic dispersion 30min dropwise adds tetraethoxy 1.0 parts by volume, stir 20h under the room temperature, at rotating speed is under 8000 rev/mins, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, obtain C/SiO
2Nanometer ball;
3) C/SiO
2/ TiO
2The preparation of composite structure
The C/SiO that step (2) is made
2After the nanometer ball drying, be scattered in the mixed solution of forming by 100 parts by volume dehydrated alcohols and 1 parts by volume water, ultrasonic 30min, the mixing solutions that dropwise adds 0.5 parts by volume tetrabutyl titanate and 14 parts by volume dehydrated alcohols, magnetic agitation 1h is under 8000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate at 60 ℃ of vacuum-drying 4h, promptly gets C/SiO
2/ TiO
2Sandwich;
4) SiO
2/ TiO
2The acquisition of hollow compound structural material
The C/SiO that step 3) is made
2/ TiO
2Sandwich obtains SiO at 500 ℃ of annealing 1.5h
2/ TiO
2Hollow compound structural material.
Embodiment 4:
A kind of SiO
2/ TiO
2The application of hollow compound structural material is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
Will be by the SiO of embodiment 3 preparations
2/ TiO
2The hollow compound structural material dispersed with stirring to be made into massfraction in ethanol be 0.4% solution, be substrate with common slide glass, utilize vertical crystal pulling method, prepare 10 layer films.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 1h
2/ TiO
2The hollow compound structural material film.
Embodiment 5:
A kind of SiO
2/ TiO
2Hollow compound structural material is made by following steps,
2) preparation Nano carbon balls
Take by weighing 6 weight part glucose, be dissolved in the water of 40 parts by volume, change in the stainless steel cauldron of inner liner polytetrafluoroethylene, the capping still places 180 ℃ resistance furnace internal reaction 6h, after reaction finishes, naturally cool to room temperature, product in the still is inclined to, and is under 10000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, 60 ℃ of vacuum-drying 4h obtain single dispersed carbon nanometer ball of particle diameter 1um;
2) Nano carbon balls surface coated silica
Take by weighing the Nano carbon balls that makes by step (1) of 0.1 weight part, be dispersed in the ethanol and 6 parts by volume water blended solution by 30 parts by volume, add 0.8ml ammoniacal liquor, ultra-sonic dispersion 30min dropwise adds tetraethoxy 0.8 parts by volume, stir 10h under the room temperature, at rotating speed is under 8000 rev/mins, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, obtain C/SiO
2Nanometer ball;
3) C/SiO
2/ TiO
2The preparation of composite structure
The C/SiO that step (2) is made
2After the nanometer ball drying, be scattered in the mixed solution of forming by 75 parts by volume dehydrated alcohols and 0.7 parts by volume water, ultrasonic 30min, the mixing solutions that dropwise adds 0.7 parts by volume tetrabutyl titanate and 10 parts by volume dehydrated alcohols, magnetic agitation 1h is under 8000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate at 60 ℃ of vacuum-drying 4h, promptly gets C/SiO
2/ TiO
2Sandwich;
4) SiO
2/ TiO
2The acquisition of hollow compound structural material
The C/SiO that step 3) is made
2/ TiO
2Sandwich obtains SiO at 500 ℃ of annealing 1.5h
2/ TiO
2Hollow compound structural material.
Embodiment 6:
A kind of SiO
2/ TiO
2The application of hollow compound structural material is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
Will be by the SiO of embodiment 5 preparations
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in ethanol be 0.4% solution, be substrate with common slide glass, utilize spin-coating method, prepare 5 layer films.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 1h
2/ TiO
2The hollow compound structural material film.
Embodiment 7:
A kind of SiO
2/ TiO
2The application of hollow compound structural material is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
Will be by the SiO of embodiment 3 preparations
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in ethanol be 0.4% solution, be substrate with common slide glass, utilize vertical crystal pulling method, prepare 8 layer films.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 1h
2/ TiO
2The hollow compound structural material film.
Embodiment 8:
A kind of SiO
2/ TiO
2The application of hollow compound structural material is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
Will be by the SiO of embodiment 1 preparation
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in polyoxyethylene glycol be 0.4% solution, be substrate with common slide glass, utilize spin-coating method, prepare 3 layer films.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 1h
2/ TiO
2The hollow compound structural material film.
Embodiment 9:
A kind of SiO
2/ TiO
2The application of hollow compound structural material is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
Will be by the SiO of embodiment 3 preparations
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in polyethylene pyrrole sieve alkane ketone be 0.4% solution, be substrate with common slide glass, utilize vertical crystal pulling method, prepare 5 layer films.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 1h
2/ TiO
2The hollow compound structural material film.
Embodiment 10:
A kind of SiO
2/ TiO
2The application of hollow compound structural material is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
Will be by the SiO of embodiment 3 preparations
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in polyethylene pyrrole sieve alkane ketone be 0.4% solution, be substrate with common slide glass, utilize spin-coating method, prepare 7 layer films.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 1h
2/ TiO
2The hollow compound structural material film.
Claims (9)
1. SiO
2/ TiO
2Hollow compound structural material is characterized in that, is made by following steps, and wherein, when weight part unit was gram, parts by volume unit was a milliliter; When weight part unit was kilogram, parts by volume unit was for rising:
1) preparation Nano carbon balls
Take by weighing the glucose of 4～8 weight parts, be dissolved in the water of 40 parts by volume, change in the stainless steel cauldron of inner liner polytetrafluoroethylene, the capping still places thermostat internal reaction 4～12h of 160 ℃～200 ℃, after reaction finishes, naturally cool to room temperature, product in the still is inclined to, and is under 10000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, 60 ℃ of vacuum-drying 4h obtain single dispersed carbon nanometer ball of particle diameter 200nm～1um;
2) Nano carbon balls surface coated silica
Take by weighing the Nano carbon balls that makes by step (1) of 0.05～0.1 weight part, be dispersed in the ethanol and 4～8 parts by volume water blended solution by 20～40 parts by volume, add 0.5～1.5 parts by volume ammoniacal liquor, ultra-sonic dispersion 20～40min dropwise adds tetraethoxy 0.5～1.0 parts by volume, stir 2～20h under the room temperature, at rotating speed is under 8000 rev/mins, centrifugation 3 minutes, taking precipitate, respectively wash three times with deionized water and dehydrated alcohol, obtain C/SiO
2Nanometer ball;
3) C/SiO
2/ TiO
2The preparation of composite structure
The C/SiO that step (2) is made
2After the nanometer ball drying, be scattered in the mixed solution of forming by 50～100 parts by volume dehydrated alcohols and 0.5～1 parts by volume water, ultrasonic 30min, the mixing solutions that dropwise adds 0.5～1 parts by volume tetrabutyl titanate and 7～14 parts by volume dehydrated alcohols, magnetic agitation 1h is under 8000 rev/mins at rotating speed, centrifugation 3 minutes, taking precipitate at 60 ℃ of vacuum-drying 4h, promptly gets C/SiO
2/ TiO
2Sandwich;
4) SiO
2/ TiO
2The acquisition of hollow compound structural material
The C/SiO that step 3) is made
2/ TiO
2Sandwich obtains SiO at 500 ℃ of annealing 0.5～1.5h
2/ TiO
2Hollow compound structural material.
2. SiO as claimed in claim 1
2/ TiO
2Hollow compound structural material is characterized in that, thermostat described in the step 1) is the baking oven of energy accurate temperature controlling or the resistance furnace of energy accurate temperature controlling.
3. SiO as claimed in claim 1
2/ TiO
2Hollow compound structural material is characterized in that step 2), 3) described dispersing method is a kind of in dispersed with stirring method or the ultra-sonic dispersion method,
4. SiO as claimed in claim 1
2/ TiO
2Hollow compound structural material is characterized in that step 2), 3) described water is deionized water.
5. SiO as claimed in claim 1
2/ TiO
2The application of hollow compound structural material is characterized in that, is to be prepared into SiO by the following method
2/ TiO
2The hollow compound structural material film is realized:
1) SiO
2/ TiO
2The preparation of hollow compound structural material film
SiO
2/ TiO
2The hollow compound structural material ultra-sonic dispersion to be made into massfraction in different solvents be 0.4% solution, be substrate with common slide glass, utilize spin-coating method or crystal pulling method, preparation 1～10 layer film.
2) film that will be made by step 1) promptly gets SiO at 450 ℃ of annealing 0.5～1.5h
2/ TiO
2The hollow compound structural material film.
6. SiO as claimed in claim 5
2/ TiO
2The application of hollow compound structural material is characterized in that, crystal pulling method described in the step 1) or spin-coating method are operated on vertical pulling machine or spin coating instrument.
7. SiO as claimed in claim 5
2/ TiO
2The application of hollow compound structural material is characterized in that, solvent described in the step 1) is water or ethanol or the ethanolic soln that adds high molecular polymer.
8. SiO as claimed in claim 7
2/ TiO
2The application of hollow compound structural material is characterized in that, described high molecular polymer comprises polyoxyethylene glycol, polyethylene pyrrole sieve alkane ketone.
9. SiO as claimed in claim 5
2/ TiO
2The application of hollow compound structural material is characterized in that step 2) described in annealing on retort furnace that can accurate temperature controlling or resistance furnace, operate.
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