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A kind of photoelectrocatalytic thin film, preparation method and application

A photoelectric catalysis and thin film technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, physical/chemical process catalysts, etc., can solve problems such as composite thin films that have not yet appeared, and achieve improved charge transport properties and good mechanical stability. , the effect of increasing the specific surface area

Active Publication Date: 2015-08-19
上海上惠纳米科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, in the prior art, there is no report or product about the composite film that above-mentioned two kinds of products make yet

Method used

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  • A kind of photoelectrocatalytic thin film, preparation method and application
  • A kind of photoelectrocatalytic thin film, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: The photoelectrocatalytic thin film provided in this embodiment, it obtains mixed slurry by uniform mixing of conductive nano-oxide slurry and titanium dioxide slurry in proportion, it is coated on titanium plate and carries out scraping coating to form uniform coating Afterwards, the mixed slurry coating is sintered to obtain the photoelectrocatalytic thin film.

[0032] The conductive nano oxide slurry is prepared by mixing conductive nano oxide, ethyl cellulose and terpineol in a mass ratio of 2:1:7.

[0033] The conductive nano-oxide is one of antimony tin oxide ATO, indium tin oxide ITO and fluorine-doped tin dioxide FTO, the particle size range of the conductive nano-oxide is 15-100 nm, and the resistance range is 0.1Ω-100Ω.

[0034] The titanium dioxide slurry is prepared by mixing titanium dioxide, ethyl cellulose and terpineol in a mass ratio of 2:1:7.

[0035] The titanium dioxide is pure anatase or mixed crystal titanium dioxide of rutile and a...

Embodiment 2

[0048] Embodiment 2: The photocatalytic thin film provided in this embodiment, the preparation method and application of the photocatalytic thin film, its components and steps are basically the same as in Example 1, the difference is:

[0049] A kind of photoelectrocatalytic thin film, it is mixed crystal titanium dioxide (average particle diameter: 10nm) slurry by conductive nano-oxide slurry and rutile and anatase, according to conductive nano-oxide slurry and rutile and anatase The mass ratio of the mixed crystal titanium dioxide slurry is mixed at a ratio of 0:1, and then the resulting slurry is scraped on a titanium plate and then sintered.

[0050] The preparation method of above-mentioned photoelectrocatalytic thin film, it comprises the following steps:

[0051] (1) Preparation of titanium dioxide slurry: take by weight the mixed crystal form of rutile and anatase, ethyl cellulose and terpineol respectively in a mass ratio of 2: 1: 7; the weighed rutile and anatase Mi...

Embodiment 3

[0056] Embodiment 3: The photocatalytic thin film provided in this embodiment, the preparation method and application of the photocatalytic thin film, its components and steps are basically the same as those in Examples 1 and 2, except that:

[0057] A kind of photoelectrocatalytic thin film, it is by the mixed crystal type titanium dioxide slurry of indium tin oxide ITO (particle size 15nm, sheet resistance 0.1Ω) slurry and rutile and anatase, by indium tin oxide ITO slurry and rutile and The anatase mixed crystal titanium dioxide slurry is mixed in a mass ratio of 0.05:1, and then obtained by scraping and sintering the obtained slurry on a titanium plate.

[0058] The preparation method of above-mentioned photoelectrocatalytic thin film, it comprises the following steps:

[0059] (1) Preparation of indium tin oxide ITO slurry: weigh indium tin oxide ITO, ethyl cellulose and terpineol respectively in a mass ratio of 2:1:7; grind the indium tin oxide ITO to make it uniformly d...

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Abstract

The invention discloses a photoelectrocatalytic film. The photoelectrocatalytic film is characterized in that the photoelectrocatalytic film is obtained by mixing conducting nano oxide slurry and titanium dioxide slurry according to the proportion, and then carrying out blade coating and sintering on the mixed slurry on a titanium plate. The invention also discloses a preparation method of the photoelectrocatalytic film and application. The photoelectrocatalytic film disclosed by the invention has obvious advantages than the prior art in the aspect of photoelectrocatalytic degradation of organic pollutants; since large specific surface area is beneficial to absorbing more dyes, and by adjustment to chemical compositions and synergy of external electric field, the transmission performance of charges on an electrode structure in the photoelectrocatalytic process is improved, direct combination of photogenerated electrons and cavities is effectively reduced, so that the photoelectrocatalytic effect is obviously improved; and the adhesion of a composite film on the titanium plate is firm, the surface of the film is not broken basically and the mechanical stability is good.

Description

technical field [0001] The invention relates to the technical field of photoelectric catalytic water treatment in environmental chemical industry, in particular to a photoelectric catalytic film, a preparation method and application of the photoelectric catalytic film. Background technique [0002] Titanium dioxide (TiO 2 ) has the characteristics of stable chemical properties, low cost, good acid and alkali resistance, low toxicity and high catalytic activity. These advantages promote TiO 2 It has become the most widely used and most promising semiconductor photocatalyst. However, TiO 2 It can only absorb ultraviolet light (below 400nm), and the utilization rate of sunlight is low; secondly, the recombination rate of photogenerated electrons and holes in intrinsic state titanium dioxide is high; in addition, in practical applications, powdered TiO 2 Photocatalytic materials are difficult to separate and easy to lose. These disadvantages restrict the application of photo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/18B01J23/14B01J27/135C02F1/32C02F1/46
Inventor 施利毅袁帅葛洁赵尹王竹仪张美红
Owner 上海上惠纳米科技有限公司