A kind of quantum dot photocatalytic flexible film and its preparation method and application

A flexible film and quantum dot technology, applied in the direction of chemical instruments and methods, applications, separation methods, etc., to achieve the effects of controlled emission, high stability, and realization of recycling resources

Active Publication Date: 2019-09-03
上海谱智环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report to sensitize TiO with CIS-based quantum dots 2 The composite material is supported on a flexible organic substrate (substrate) to make a photocatalytic film. This photocatalytic film

Method used

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  • A kind of quantum dot photocatalytic flexible film and its preparation method and application
  • A kind of quantum dot photocatalytic flexible film and its preparation method and application
  • A kind of quantum dot photocatalytic flexible film and its preparation method and application

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Effect test

Embodiment 1

[0043] The present embodiment provides a kind of preparation method of quantum dot photocatalytic thin film, it is characterized in that, this method comprises the following steps:

[0044] (1) The preparation of the silica sol is as follows: mix TEOS, ethanol and deionized water, the volume ratio is 5:1:1.2, stir for 30min; add 37% hydrochloric acid (0.005:1 volume ratio to ethanol ), continuously stirring the catalytic hydrolysis mixture; then take the above solution and dilute it 20 times with ethanol, and continue to stir at room temperature for 24 hours; finally adjust the pH to 8 with ethanolamine ethanol solution.

[0045] (2) The TiO 2 The slurry was prepared as follows: TiO 2 The powder is sintered in a muffle furnace at 450°C for 30min; prepare 0.22g / mL TiO 2 Ethanol dispersion and sonication; continue to add TTIP (with TiO 2 The ratio of the amount of substance is 0.036:1) Continue to ultrasonic for 60min, and further centrifuge to obtain transparency: the TiO us...

Embodiment 2

[0053] Embodiment 2 is a variation example of embodiment 1, and the difference is only: in step (3), the reaction time is 420min.

[0054] Before spraying, prepare the prepared CIS / ZnS:Al-TiO 2 (420min) photocatalytic film (substrate thickness 0.1mm), apply 1,3-dichloropropene to the soil by the injection method commonly used in agriculture, and cover the film on the soil surface while injecting the medicine to prevent the volatilization of the medicine solution. Squeeze around. where TiO 2 The layer is composed of transparent and opaque layers. Low temperature: 5°C-15°C, irradiate under sunlight for 35h, and measure the degradation rate of 1,3-dichloropropene in the film. The degradation rate is 99%.

Embodiment 3

[0056] Embodiment 3 is a variation example of embodiment 1, and the difference is only: in step (3), the reaction time is 420min.

[0057] Before spraying, prepare the prepared CIS / ZnS:Al-TiO 2 (420min) photocatalytic film (substrate thickness 0.1mm), apply 1,3-dichloropropene to the soil by the injection method commonly used in agriculture, and cover the film on the soil surface while injecting the medicine to prevent the volatilization of the medicine solution. Squeeze around. where TiO 2 The layer is composed of transparent and opaque layers, medium temperature: 15°C-25°C, and irradiated under sunlight for 20h to measure the degradation rate of 1,3-dichloropropene in the film. The degradation rate is 99%.

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Abstract

The invention relates to a quantum dot photocatalytic flexible film as well as a preparation method and an application thereof. The quantum dot photocatalytic flexible film comprises a flexible organic substrate as well as a silicon dioxide layer, a TiO2 layer and a quantum dot layer which are loaded onto the substrate, wherein the TiO2 is one or more of 25nm anatase, 200-400nm TiO2 or Degussa P25 type TiO2. The quantum dot photocatalytic flexible film is obtained by carrying out sensitization on a green non-toxic CuInS2-based quantum dot with relatively large visible light absorption coefficient, photocatalytic degradation of fumigant in visible light can be realized, and emission loss of the fumigant in the air is controlled; and meanwhile, a CuInS2 / ZnS:Al-TiO2 quantum dot photocatalytic flexible film has relatively high stability. Compared with the prior art, the prepared quantum dot photocatalytic flexible film has the advantages of degradation of the fumigant in the visible light, high efficiency, stability, environmental friendliness and easy operation.

Description

technical field [0001] The invention relates to the field of environmental protection, and relates to a quantum dot photocatalytic flexible film and its preparation method and application, in particular to a method for controlling the fumigant atmospheric emission loss of a quantum dot photocatalytic flexible film, and more particularly relates to CIS-based quantum dots sensitized TiO with large visible light absorption coefficient 2 Realize photocatalytic degradation of fumigant under visible light and control its emission loss in the atmosphere. Background technique [0002] Soil fumigant is a kind of pesticide that can directly and effectively control soil-borne diseases. It has the property of being easy to gasify at room temperature. Effect of the gas, resulting in fumigation effect. Due to the high volatility of soil fumigants, they will also diffuse to the soil surface and enter the atmosphere, causing a series of environmental problems. With people's emphasis on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/72B01J31/38B01J35/02A01M13/00A01M17/00A01M21/04
CPCB01D53/8603B01D53/8662B01D53/8668A01M13/00A01M17/00A01M21/043B01J31/38B01D2257/2064B01D2257/306B01J35/39B01J35/00B01J35/30
Inventor 严丽丽李良沈国清孙明星秦娇龙
Owner 上海谱智环境科技有限公司
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