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Preparation method of zinc oxide thin film photocatalyst

A technology of zinc oxide thin film and photocatalyst, which is applied in the fields of environmental protection, inorganic materials and photocatalysis, can solve the problems of a large number of surfactant operation steps, and achieve the effect of facilitating recovery and reuse, improving sample purity and high activity

Inactive Publication Date: 2008-03-12
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods either require expensive instruments and equipment, precise operating methods, or require a large amount of surfactants and complicated operating steps in the process of realizing zinc oxide curing. In order to solve the above problems, it is urgent to develop simple, economical and environmentally friendly methods. To prepare high-efficiency nano-ZnO photocatalytic film

Method used

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  • Preparation method of zinc oxide thin film photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Clean a commercially available metal zinc sheet with a purity greater than 99.9%, a thickness of 0.1cm, and an area of ​​1cm×1cm in ultrasonic waves with distilled water, absolute ethanol and acetone, and put the cleaned zinc sheet into 20ml polytetrafluoroethylene Add 4ml of distilled water into the lined autoclave, seal the container and put it in a 100°C incubator to react for 48 hours. After cooling, take out the zinc flakes and dry them to obtain the zinc oxide film. Curve 1 in accompanying drawing 1 is the X-ray diffractogram of obtained product, can find out from the figure, obtained product diffraction peak is the diffraction peak of zinc oxide except the diffraction peak of substrate zinc plate, and no unnecessary impurity peak occurs. In this patent, the activity of zinc oxide is evaluated by the degradation rate of zinc oxide film photocatalytically degrading methyl orange under ultraviolet light. Curve 1 in accompanying drawing 2 is the degradation rate diag...

Embodiment 2

[0023] Clean a commercially available metal zinc sheet with a purity greater than 99.9%, a thickness of 0.1cm, and an area of ​​1cm×1cm in ultrasonic waves with distilled water, absolute ethanol and acetone, and put the cleaned zinc sheet into 20ml polytetrafluoroethylene Add 4ml of distilled water into the lined autoclave, seal the container and put it in a thermostat at 140°C to react for 24 hours. After cooling, take out the zinc flakes and dry them to obtain the zinc oxide film. Curve 2 in accompanying drawing 1 is the X-ray diffractogram of obtained product, as can be seen from the figure, obtained product diffraction peak except the diffraction peak of substrate zinc flake, is the diffraction peak of zinc oxide, and no unnecessary impurity peak occurs. In this patent, the activity of zinc oxide is evaluated by the degradation rate of zinc oxide film photocatalytically degrading methyl orange under ultraviolet light. Curve 2 in accompanying drawing 2 is the degradation ra...

Embodiment 3

[0025] Clean a commercially available metal zinc sheet with a purity greater than 99.9%, a thickness of 0.1cm, and an area of ​​1cm×1cm in ultrasonic waves with distilled water, absolute ethanol and acetone, and put the cleaned zinc sheet into 20ml polytetrafluoroethylene Add 4ml of distilled water to the lined autoclave, seal the container and put it in a 180°C incubator to react for 4 hours. After cooling, take out the zinc flakes and dry them to obtain the zinc oxide film. Curve 3 in accompanying drawing 1 is the X-ray diffractogram of obtained product, can find out from the figure, obtained product diffraction peak is the diffraction peak of zinc oxide except the diffraction peak of substrate zinc plate, and no unnecessary impurity peak occurs. In this patent, the activity of zinc oxide is evaluated by the degradation rate of zinc oxide film photocatalytically degrading methyl orange under ultraviolet light. Curve 3 in accompanying drawing 2 is the degradation rate figure ...

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Abstract

The present invention discloses a preparation method of a zinc oxide thin-membrane photo-catalyst. With the method, a zinc metal sheet is put into the excessive distilled water to have a hydrothermal reaction under the temperature of 100 to 180 centigrade degrees for 4 to 48 hours. After the water is cooled down, the zinc sheet is taken out and dried, and the nanometer zinc oxide thin-membrane photo-catalyst is got. The hydrothermal reaction is carried out in a high-pressure kettle, which is provided with a poly-tetrafluoroethylene liner. Before the reaction, the zinc sheet is cleaned with distilled water, absolute ethanol and acetone in the ultrasonic way. The present invention uses the hydrothermal reaction method to synthesize the nanometer zinc oxide thin-membrane photo-catalyst. The synthesis method is simple and no acid, alkali or organic solvent is involved in the reaction. Compared with other wet chemical methods, the present invention is provided with the advantage that the present invention is environment-friendly, requires a low temperature, and needs no calcination, and so on. Moreover, the zinc oxide thin-membrane got with the present invention is provided with a higher photo-catalysis activity.

Description

technical field [0001] The invention belongs to the technical fields of photocatalysis, environmental protection and inorganic materials, and in particular relates to a preparation method of a nano zinc oxide thin film photocatalyst. Background technique [0002] At present, environmental problems have attracted more and more attention. Organic wastewater often contains halogenated aliphatic hydrocarbons, halogenated aromatics, nitroaromatics, polycyclic aromatic hydrocarbons, phenols and other harmful components. These harmful components have caused large-scale pollution to the ecological environment of rivers, rivers, lakes, and seas. Serious threat to human health. [0003] The application of semiconductor photocatalytic technology to purify the environment is a new method developed in recent years. Semiconductor photocatalysts have strong catalytic activity, and can convert harmful substances in organic wastewater into CO under the irradiation of sunlight or ultraviole...

Claims

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Application Information

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IPC IPC(8): B01J23/06
Inventor 李秀艳吴明娒赵丰华杨贤锋
Owner SUN YAT SEN UNIV
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