Titanium dioxide binary Na crystal porous membrane and preparation method thereof

A technology of titanium dioxide and binary nanocrystals, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve problems such as poor bonding force, and achieve improved service life, good photoelectric conversion rate, and strong bonding force Effect

Inactive Publication Date: 2008-06-25
BYD CO LTD
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcoming of poor binding force of the titanium dioxide binary nanocrystalline film to the conductive bottom layer in the prior art, and provide a kind of titanium dioxide binary nanocrystalline film with good binding force to the conductive bottom layer and its preparation method

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  • Titanium dioxide binary Na crystal porous membrane and preparation method thereof
  • Titanium dioxide binary Na crystal porous membrane and preparation method thereof

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Embodiment approach

[0020]According to a preferred embodiment of the preparation method of the titanium dioxide binary nanocrystalline thin film provided by the present invention, the preparation method of the sol containing large-diameter titanium dioxide and small-diameter titanium dioxide includes combining a sol containing large-diameter titanium dioxide and a sol containing small-sized titanium dioxide. The particle size titanium dioxide sol is uniformly mixed, and the amount of the sol containing the large particle size titanium dioxide and the sol containing the small particle size titanium dioxide is such that the weight ratio of the small particle size titanium dioxide to the large particle size titanium dioxide is 9-99:1. Wherein, the preparation method of the sol containing large particle size titanium dioxide and the sol containing small particle size titanium dioxide can be prepared by the existing method for preparing titanium dioxide sol, for example, it can be prepared by combining ti...

Embodiment 1

[0027] This embodiment is used to illustrate the titanium dioxide binary nanocrystalline film and the preparation method thereof provided by the present invention.

[0028] The 4 g particle diameter is 60-90 nanometers, the average particle diameter D 50 Mix 70 nanometers of titanium dioxide, 15 ml of deionized water, 0.2 ml of acetylacetone and 0.15 ml of OP-10 emulsifier, and grind in an agate mortar after being dispersed by ultrasonic vibration to obtain a uniformly dispersed sol A containing large particle size titanium dioxide . Slowly dissolve 2 g of butyl titanate in 38 ml of absolute ethanol, stir and mix well, and then slowly add a small amount of distilled water and diethanolamine at room temperature. The color of the solution first becomes milky white and then rapidly orange-yellow After stirring at a constant temperature for 8 hours and then aging at a constant temperature for 48 hours, a uniform, transparent and stable sol B containing small particle size titanium dio...

Embodiment 2

[0030] This embodiment is used to illustrate the titanium dioxide binary nanocrystalline film and the preparation method thereof provided by the present invention.

[0031] The 3g particle diameter is 70-90 nanometers, the average particle diameter D 50 Mix 90 nanometers of titanium dioxide, 12 ml of deionized water, 0.16 ml of acetylacetone, and 0.1 ml of OP-10 emulsifier. After being dispersed by ultrasonic vibration, grind in an agate mortar to obtain a uniformly dispersed sol A containing large particle size titanium dioxide . The 3 g particle diameter is 1-25 nanometers, the average particle diameter D 50 It is 20 nanometers of titanium dioxide P25 (produced by Degussa), 16 ml of deionized water, 0.15 ml of acetylacetone and 0.12 ml of OP-10 emulsifier. After being dispersed by ultrasonic vibration, it is ground in an agate mortar to obtain a uniformly dispersed Sol B containing small particle size titanium dioxide. After mixing 0.2 g of sol A and 3 g of sol B evenly, they we...

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Abstract

The invention relates to a titanium dioxide binary nanocrystalline film, which comprises large particle size titanium dioxide and small particle size titanium dioxide, wherein, the particle diameter of the large particle size titanium dioxide is 60-95 nometer, and the particle diameter of the small particle size titanium dioxide is not more than 40 nanometer. The titanium dioxide binary nanocrystalline film provided bythe invention not only is provided with better photoelectric transformation rate, but also is provided with outstanding binding force with the condustive bottom layer, hence when the titanium dioxide binary nanocrystalline film is used for a dye-sensitized solarcell , the service life of the dye-sensitized solar cell can be prolonged greatly. The preparation method of the titanium dioxide binary nanocrystalline film provided by the invention comprises the following steps; after the titanium dioxides with different particle sizes are manufactured into the collosol and then the collosol is mixed, to cause the mixed titanium dioxide of two different particle sizesto be dispersed more uniformly, thereby to cause the binding force of the obtained binary nanocrystalline film with the conduative bottom layer to be stronger when the obtained binary nanocrystalline film is used for dye-sensitized solar cell , and the service life of the dye-sensitized solar cell can be prolonged greatly.

Description

Technical field [0001] The invention relates to a titanium dioxide nanocrystalline porous film, in particular to a titanium dioxide binary nanocrystalline porous film and a preparation method thereof. Background technique [0002] Today, when non-renewable energy sources such as electricity, coal, and oil are in urgent need, the free, clean and inexhaustible solar energy has attracted the attention of the world. Solar cells, a device that can directly convert solar energy into electrical energy, have become a field for many researchers. Silicon solar cells were first developed by Bell Laboratories in the United States, with high photoelectric conversion efficiency, so it became the first solar cell product to be industrially produced. However, the manufacturing process of silicon solar cells is complicated, expensive, and the raw material silicon is increasingly scarce, which restricts its wide application. Lausanne Institute of Technology Professors and others first proposed th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/02H01L31/04H01L31/18H01G9/20H01M14/00C30B29/60C30B29/16C30B5/00C01G23/047
CPCY02E10/542Y02P70/50
Inventor 刘倩倩董俊卿
Owner BYD CO LTD
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