Quantum dot photocatalytic flexible film as well as preparation method and application thereof

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

Active Publication Date: 2016-06-15
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 i

Method used

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  • Quantum dot photocatalytic flexible film as well as preparation method and application thereof
  • Quantum dot photocatalytic flexible film as well as preparation method and application thereof
  • Quantum dot photocatalytic flexible film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a method for preparing a quantum dot photocatalytic film, which is characterized in that the method includes the following steps:

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

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

Embodiment 2

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

[0054] Before application, first prepare the prepared CIS / ZnS:Al-TiO 2 (420min) Photocatalytic film (substrate thickness 0.1mm), use the injection method commonly used in agriculture to apply 1,3-dichloropropene to the soil, and cover the surface of the soil while injecting the drug to prevent the volatilization of the drug solution. Use soil Squeeze all around. Of which TiO 2 The layer is composed of transparent and opaque layers, low temperature: 5°C~15°C, irradiated under sunlight for 35h, and the degradation rate of 1,3-dichloropropene in the film is measured. The degradation rate is 99%.

Embodiment 3

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

[0057] Before application, first prepare the prepared CIS / ZnS:Al-TiO 2 (420min) Photocatalytic film (substrate thickness 0.1mm), use the injection method commonly used in agriculture to apply 1,3-dichloropropene to the soil, and cover the surface of the soil while injecting the drug to prevent the volatilization of the drug solution. Use soil Squeeze all around. Of which TiO 2 The layer is composed of transparent and opaque layers, with a medium temperature: 15°C to 25°C, irradiated under sunlight for 20 hours, and the degradation rate of 1,3-dichloropropene in the film is measured. 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 present invention relates to the field of environmental protection, relates to a quantum dot photocatalytic flexible film and a preparation method and application thereof, in particular to a method for controlling the atmospheric emission loss of a fumigant by a quantum dot photocatalytic flexible film, and more specifically to a CIS-based quantum dot sensitized TiO with large visible light absorption coefficient 2 Realize the photocatalytic degradation of the 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 easily gasified at room temperature. After being applied to the soil, it spreads in the soil and can produce insecticide, sterilization, disinfection and weeding. Effective gas, which produces fumigation and disinfection effect. Due to the high volatility of soil ...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/72B01J31/38B01J35/02A01M13/00A01M17/00A01M21/04
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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