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Titanium dioxide nano material film and preparation method thereof

A material film and nanomaterial technology, which is applied in the field of low-dimensional nanomaterial film preparation, can solve problems such as being unsuitable for large-scale production, poor film stability, and unfavorable large-scale production, so as to strengthen neck connections, promote industrialization, and expand use. range effect

Inactive Publication Date: 2006-04-26
青岛黑金热工能源有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Traditionally, the preparation of photoanode films for dye-sensitized solar cells mainly adopts hand-coating and screen printing methods. The films prepared by hand-coating methods have poor stability and are obviously not suitable for large-scale production. The screen printing method is not suitable for experimental equipment. High requirements are not conducive to large-scale production

Method used

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  • Titanium dioxide nano material film and preparation method thereof
  • Titanium dioxide nano material film and preparation method thereof
  • Titanium dioxide nano material film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Put 0.5wt% PVB surfactant into dehydrated alcohol, ultrasonic 30min, surfactant is fully dissolved, then 5wt% titanium oxide nanocrystals (average particle diameter 25nm), 0.8wt%Ti(SO 4 ) 2 The electrolytes were put into the solution one by one, and stirred evenly by ultrasonic. Stainless steel is used as the anode, and the cleaned transparent ITO conductive glass is used as the cathode. A constant voltage power supply was used as the power supply device, the deposition voltage was 5V / cm, and the deposition time was 30 minutes. Finally, a titanium oxide nanocrystalline film with a flat surface, uniform dispersion, and a thickness of 9.2 μm was obtained on the cathode substrate. The film is then heat-treated at 500° C. for 2 hours to obtain the final nanocrystalline titanium oxide film. Dye-sensitized solar cells are assembled with the titanium oxide nanocrystalline film, the dye is polypyridine ruthenium carboxylate, and the electrolyte is I 2 The acetocyanide solut...

Embodiment 2

[0031] Put 1wt% PVA surfactant into dehydrated alcohol, ultrasonic 30min, surfactant is fully dissolved, then 10wt% titanium oxide nanotubes (average outer diameter 10nm, inner diameter 5nm), 2wt% Zn (NO 3 ) 2 The electrolytes were put into the solution one by one, and stirred evenly by ultrasonic. Stainless steel is used as the anode, and the cleaned transparent FTO conductive glass is used as the cathode. A constant voltage power supply was used as the power supply device, the deposition voltage was 20 V / cm, and the deposition time was 20 minutes. Finally, a titanium oxide nanotube film with a flat surface, uniform dispersion, and a thickness of 12 μm is obtained on the cathode substrate. The film is then heat-treated at 450° C. for 2 hours to obtain the final titanium oxide nanotube film. Dye-sensitized solar cells are assembled with the titanium oxide nanotube film, the dye is polypyridine ruthenium carboxylate, and the electrolyte is I 2 +LiI+TBP (tetra-tert-butylpyri...

Embodiment 3

[0033] Put 3wt% SDS surfactant into dehydrated alcohol, ultrasonic 30min, surfactant is fully dissolved, then 15wt% titanium oxide nanorods (average outer diameter 15nm), 4wt%Ni(NO 3 ) 2 The electrolytes were put into the solution one by one, and stirred evenly by ultrasonic. Stainless steel is used as the anode, and the cleaned transparent flexible ITO polymer is used as the cathode. A constant voltage power supply was used as the power supply device, the deposition voltage was 40V / cm, and the deposition time was 10 minutes. Finally, a titanium oxide nanorod film with a flat surface, uniform dispersion, and a thickness of 10.5 μm was obtained on the cathode substrate. The film was then subjected to microwave treatment for 1 h to obtain the final titanium oxide nanorod film. Dye-sensitized solar cells were assembled with the titanium oxide nanorod film, the dye was polypyridine ruthenium carboxylate, and the electrolyte was I 2 The acetocyanide solution of +LiI+TBP (tetra-...

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Abstract

The present invention is nanometer titania film and its preparation process, and belongs to low-dimensional nanometer material technology. In the electrochemical deposition process, nanometer titania powder, surfactant, anhydrous ethanol and metal salt as electrolyte are mixed and ultrasonic dispersed to obtain homogeneously dispersed stable suspension. By means of stainless steel or nickel sheet as anode, transparent conducting ITO glass or transparent conducting FTO polymer as depositing cathode, and constant voltage power source, nanometer titania film is deposited on the cathode substrate at room temperature. The deposited film is then heat treated at 400-550 deg.c or microwave treated for 1-3 hr. The process has easy control and low temperature, and the deposited nanometer titania film has flat surface, high porosity, great specific area and low cost. The present invention is suitable for industry production of dye sensitized solar cell film material.

Description

technical field [0001] The invention belongs to the preparation of low-dimensional nano material thin films, in particular to a method for preparing titanium oxide nano material thin films with controllable thickness, aperture and porosity by electrophoretic deposition. Background technique [0002] Titanium oxide nanocrystalline semiconducting thin films with wide bandgap are wonderful materials, they exhibit special optical and electrical properties, and are widely used in photocatalysis, electroluminescence and optoelectronic devices. In 1991, Swiss scientist Gratzel invented a new concept of solar cells - dye-sensitized solar cells (DSSC), which immediately attracted widespread attention and attention of scientists from all over the world. It mainly consists of 5 parts: transparent conductive electrode, titanium oxide porous film, adsorbed dye molecules, electrolyte, and platinum-coated counter electrode. Its working mechanism is as follows: dye molecules absorb photons...

Claims

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Application Information

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IPC IPC(8): C25D13/02
Inventor 林红王宁林春富李建保杨晓战
Owner 青岛黑金热工能源有限公司
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