CN1233457C - Photocatalytic self-cleaning thin film - Google Patents
Photocatalytic self-cleaning thin film Download PDFInfo
- Publication number
- CN1233457C CN1233457C CN 03117341 CN03117341A CN1233457C CN 1233457 C CN1233457 C CN 1233457C CN 03117341 CN03117341 CN 03117341 CN 03117341 A CN03117341 A CN 03117341A CN 1233457 C CN1233457 C CN 1233457C
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- CN
- China
- Prior art keywords
- film
- cleaning
- titanium dioxide
- photocatalytic self
- value range
- Prior art date
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Abstract
The present invention relates to a photocatalytic self-cleaning film, and belongs to the technical field of materials. The photocatalytic self-cleaning film is made with a sol-gel method, a soaking and pulling method or a coating method. A wet film is baked and dried by infrared light and put into a furnace to be treated by heat at the temperature of 300 DEG C to 720 DEG C. The photocatalytic self-cleaning film has a double-layer structure, the surface layer is a titanium dioxide film, and a bottom layer is a composite film of titanium dioxide, aluminium oxide and tin dioxide. The value range of the molar percentage content of the aluminium oxide in the composite film is from 0.5% to 50%, the value range of the molar percentage content of the tin dioxide is from 0.5% to 30%, and the value range of the molar percentage content of the titanium dioxide is from 20% to 99%. The present invention has the advantages of enhancing the photocatalytic activity and the super hydrophilic characteristic of the film under natural light or sunlight, effectively degrading harmful substances, cleaning and removing dirt by itself and preventing water and fog.
Description
Technical field:
The present invention relates to a kind of photochemical catalysis self-cleaning film, belong to the material technology field.
Background technology:
Because TiO
2That film itself has is nontoxic, pollution-free, can decomposing organic pollutant and obnoxious flavour, sterilization, anti-these excellent functions of water smoke, environmental pollution serious day by day have very wide application prospect now, at present, known TiO
2The photocatalysis efficiency of film is lower, and super water-wet behavior needs UV-irradiation and just can obtain embodying, and has so just limited the popularity that this film is used.In order to overcome above-mentioned deficiency, need to improve TiO
2The photocatalysis efficiency of film and super water-wet behavior.
Summary of the invention:
The present invention is in order to overcome existing TiO
2The deficiency of film aspect photocatalysis efficiency and super water-wet behavior the invention provides a kind of photochemical catalysis self-cleaning film.
The technical solution adopted for the present invention to solve the technical problems is: the present invention is made by sol-gel method, this photochemical catalysis self-cleaning film adopts bilayer structure, upper layer is a titanium deoxid film, and bottom is the laminated film of titanium dioxide and aluminium sesquioxide, tindioxide.During making: make earlier TiO respectively
2Colloidal sol, Al
2O
3Colloidal sol and SnO
2Colloidal sol mixes in proportion three kinds of colloidal sols then, makes TiO
2-Al
2O
3-SnO
2Complex sol, Al in the complex sol
2O
3The span of molar content be 0.5%～50%, SnO
2The span of molar content be 0.5%～30%, TiO
2The span of molar content be 20%～99%; Adopt dip-coating method or coating method that the complex sol that makes is evenly distributed on the substrate then, and the substrate that will scribble complex sol toasts dry under infrared light, put into stove again and heat-treat, adopt dip-coating method or coating method to make the TiO that makes once more after the taking-up cooling
2Colloidal sol is evenly distributed on the surface of the above-mentioned compound coating (or film) of substrate, and baking is dry under infrared light, puts into and obtains self-cleaning film after stove is heat-treated.
The present invention has under natural light or solar irradiation, can improve the photocatalytic activity and the super water-wet behavior of film, the advantages such as objectionable impurities, self-cleaning decontamination and anti-water smoke of more effectively degrading.
Embodiment:
Embodiment 1: the present invention adopts known sol-gel method to make.For TiO
2-Al
2O
3-SnO
2Two one-step hydrolysis methods are adopted in the preparation of complex sol, promptly make earlier TiO respectively
2Colloidal sol, Al
2O
3Colloidal sol and SnO
2Colloidal sol is again with TiO
2Colloidal sol, Al
2O
3Colloidal sol and SnO
2Colloidal sol is pressed Al
2O
3Molar content be 0.5%, SnO
2Molar content be 0.5%, TiO
2The mixed of molar content 99% even.Adopt dip-coating method or coating method that the complex sol that makes is evenly distributed on the substrate, and the substrate that will scribble complex sol toasts dry under infrared light, put into stove thermal treatment under 300 ℃～720 ℃ temperature again, adopt dip-coating method or coating method to make the TiO that makes once more after the taking-up cooling
2Colloidal sol is evenly distributed on the surface of the above-mentioned compound coating (or film) of substrate, and baking is dry under infrared light, just can obtain having than pure TiO after putting into stove again and heat-treating
2The self-cleaning film of the super water-wet behavior that the photocatalytic activity that film is high is become reconciled.
Embodiment 2: substantially with embodiment 1, difference is Al in the complex sol
2O
3Molar content be 30%, SnO
2Molar content be 15%, TiO
2Molar content 55%.
Embodiment 3: substantially with embodiment 1, difference is Al in the complex sol
2O
3Molar content be 50%, SnO
2Molar content be 30%, TiO
2Molar content 20%.
Claims (1)
1. a photochemical catalysis self-cleaning film is made by sol-gel method, it is characterized in that this photochemical catalysis self-cleaning film adopts bilayer structure, and upper layer is a titanium deoxid film, and bottom is the laminated film of titanium dioxide and aluminium sesquioxide, tindioxide; The span of the molar content of aluminium sesquioxide is 0.5%～50% in the laminated film, and the span of the molar content of tindioxide is 0.5%～30%, and the span of the molar content of titanium dioxide is 20%～99%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117341 CN1233457C (en) | 2003-02-19 | 2003-02-19 | Photocatalytic self-cleaning thin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117341 CN1233457C (en) | 2003-02-19 | 2003-02-19 | Photocatalytic self-cleaning thin film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1522795A CN1522795A (en) | 2004-08-25 |
| CN1233457C true CN1233457C (en) | 2005-12-28 |
Family
ID=34284683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03117341 Expired - Fee Related CN1233457C (en) | 2003-02-19 | 2003-02-19 | Photocatalytic self-cleaning thin film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1233457C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1829991A1 (en) * | 2006-03-02 | 2007-09-05 | UGINE & ALZ FRANCE | Stainless steel plate coated with self-cleaning coating. |
| CN100999624B (en) * | 2007-01-05 | 2010-05-19 | 福州大学 | Compounding of inorganic anti-pollution coating for high pressure insulator surface and preparation process thereof |
| CN101037553B (en) * | 2007-02-13 | 2010-04-21 | 云南大学 | Preparation and application method of optically catalysed environment protection type coating |
-
2003
- 2003-02-19 CN CN 03117341 patent/CN1233457C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1522795A (en) | 2004-08-25 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |