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Photoelectrocatalysis thin film and preparation method thereof

A photoelectric catalysis and thin-film technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of increasing energy consumption, unfavorable industrial production, and complicated use of equipment and other problems, to achieve the effect of improving adhesion, improving photocatalytic activity, and making full use of

Active Publication Date: 2012-05-02
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology has the following two disadvantages: the film prepared simply by sol-gel dipping and pulling method has poor adhesion to glass and is easy to fall off; the sol of this method needs to be aged for more than 10 days, and the preparation cycle is very long
However, the disadvantages of this technology are: the preparation of anodic oxidation is more complicated, and it needs an external power supply to assist, which increases energy consumption and high cost; later stage fluorine and boron doping use more dangerous fluoride
The disadvantages of this technology are: the use of equipment is relatively complicated, an oil bath is required to control the temperature of the precursor, and argon is used as the carrier gas to transmit volatiles, which increases the cost and operational complexity; in order to avoid the disadvantage of poor conductivity of ferric oxide , the film area prepared by the above technology is very small, which is not conducive to industrial production

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  • Photoelectrocatalysis thin film and preparation method thereof
  • Photoelectrocatalysis thin film and preparation method thereof
  • Photoelectrocatalysis thin film and preparation method thereof

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preparation example Construction

[0046] The preparation method of the invention is a preparation method combining a sol-gel method and a chemical vapor deposition method. That is, first, a titanium dioxide film is formed on one side of a conductive substrate using a precursor prepared by a sol-gel method such as a titanium-containing solution or a sol, and then a layer of titanium dioxide is formed on it using a chemical vapor deposition method. Diiron film, then according to the purpose of the prepared photocatalytic film, optionally, alternately use sol-gel method and chemical vapor deposition method, and then alternately form multilayer titanium dioxide film and multilayer trioxide film on it. Photocatalytic thin film combined with diiron thin film.

[0047] Therefore, the present invention provides a method for preparing a photoelectrocatalytic thin film. The method includes the following steps: the first step is to clean and dry a conductive substrate with a suitable size; the second step is to coat the ...

Embodiment 1

[0070] Cut the FTO conductive glass (NSG FTO-14, provided by Wuhan Geo Instrument Co., Ltd., the same below) into a size of 5cm×10cm. The conductive glass is ultrasonically cleaned with deionized water, isopropanol and absolute ethanol in sequence, even if it does not hang water droplets, and dried in an oven at 70°C for 5-30min, and set aside. Prepare 0.15M titanium tetrachloride (provided by Tianjin Guangfu Fine Chemical Research Institute, the same below) aqueous solution, immerse the prepared conductive glass in the prepared titanium tetrachloride aqueous solution, and then place the whole in an oven at 70°C 60 minutes. Then take out the conductive glass and dry it for later use.

[0071] Weigh 0.05g of ferrocene powder (purity: 99%, provided by Shanghai Jingchun Reagent Co., Ltd., the same below) as the precursor of chemical vapor deposition. Then, sprinkle the ferrocene powder on one edge of the conductive glass at about 2mm. Place the conductive glass with the precur...

Embodiment 2

[0078] Cut the FTO conductive glass into a size of 5cm×10cm. The conductive glass was ultrasonically cleaned with deionized water, isopropanol and absolute ethanol in sequence, and dried in an oven at 70°C for 5-30 minutes for later use. A 0.1M titanium tetrachloride aqueous solution was prepared, the above prepared conductive glass was immersed in the above prepared titanium tetrachloride aqueous solution, and placed in an oven at 100° C. for 120 minutes. Then take out the conductive glass and dry it in an oven at 70°C for 5-30min, and set it aside. Weigh 0.1 g of ferrocene as the precursor of the chemical vapor deposition method. Sprinkle the drug ferrocene on one side of the conductive glass at about 4mm. Place the conductive glass with the precursor in the middle of the tube furnace. The flowmeter was set to 500 sccm, and the tube furnace was set at 5°C / min to raise the temperature to 650°C in an air atmosphere. After keeping the temperature for 4 hours, it was naturall...

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Abstract

The invention discloses a photoelectrocatalysis thin film and a preparation method thereof. The photoelectrocatalysis thin film comprises a conducting substrate as well as one or more titanium dioxide layers and one or more ferric oxide layers which are laminated at one side of the conducting substrate, wherein the titanium dioxide layers and the ferric oxide layers are alternately arranged, the layer closest to the conducting substrate is the titanium dioxide layer, and the layer farthest away from the conducting substrate is the ferric oxide layer. The preparation method provided by the invention combines a sol-gel method and a chemical vapor deposition method. By using the photoelectrocatalysis thin film provided by the invention, the cohesive property of the thin film and the substrate can be remarkably improved, the photoelectrocatalysis activity of the photoelectrocatalysis thin film can be remarkably improved, and photoresponse of the photoelectrocatalysis thin film is widened to a visible light range, thus, solar energy can be more sufficiently utilized.

Description

technical field [0001] The invention relates to a thin film and a preparation method thereof, in particular to a photoelectrocatalytic thin film and a preparation method thereof. Background technique [0002] In recent years, research on photocatalysis of semiconductor nanomaterials has received extensive attention. As an important functional material, nano-titanium dioxide film has important application prospects in the storage and utilization of solar energy, photochemical conversion, and environmental treatment of organic pollutants. There are many methods for preparing nano-TiO2 films, among which the sol-gel method is the most researched at present. The advantage of this method is that it is easy to form a large-area film and can be fixed on a complex-shaped substrate. Currently, the preparation of a film on the surface of ordinary glass by the sol-gel method has been reported in the literature. These methods all use precursors such as butyl titanate as raw materials,...

Claims

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Application Information

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IPC IPC(8): H01L31/032H01L31/18B01J23/745
CPCY02P70/521Y02P70/50
Inventor 李晓洁赵伟王志勇
Owner ENN SCI & TECH DEV
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