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

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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

Method used

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  • Preparation method of zinc oxide thin film photocatalyst

Examples

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Example Embodiment

[0020] Example 1

[0021] The commercially available metal zinc flakes with a purity greater than 99.9%, a thickness of 0.1 cm, and an area of ​​1 cm × 1 cm were cleaned in ultrasonic waves with distilled water, absolute ethanol and acetone, and the cleaned zinc flakes were placed in 20 ml of polytetrafluoroethylene. In the lined autoclave, add 4ml of distilled water, seal the container, put it into a 100°C thermostat to react for 48h, take out the zinc flakes after cooling and dry to obtain a zinc oxide film. Curve 1 in accompanying drawing 1 is the X-ray diffractogram of the obtained product, as can be seen from the figure, the diffraction peaks of the obtained product are all the diffraction peaks of zinc oxide except the diffraction peaks of the base zinc flakes, and there is no redundant impurity peaks. In this patent, the activity of zinc oxide is evaluated by the degradation rate of the zinc oxide film in photocatalytic degradation of methyl orange under ultraviolet lig...

Example Embodiment

[0022] Example 2

[0023] The commercially available metal zinc flakes with a purity greater than 99.9%, a thickness of 0.1 cm, and an area of ​​1 cm × 1 cm were cleaned in ultrasonic waves with distilled water, absolute ethanol and acetone, and the cleaned zinc flakes were placed in 20 ml of polytetrafluoroethylene. In the lined autoclave, add 4ml of distilled water, seal the container, put it into a 140°C thermostat to react for 24h, take out the zinc flakes after cooling and dry to obtain a zinc oxide film. Curve 2 in accompanying drawing 1 is the X-ray diffractogram of the obtained product, as can be seen from the figure, the diffraction peaks of the obtained product are all the diffraction peaks of zinc oxide except the diffraction peaks of the base zinc flakes, and there are no redundant impurity peaks. In this patent, the activity of zinc oxide is evaluated by the degradation rate of the zinc oxide film in photocatalytic degradation of methyl orange under ultraviolet li...

Example Embodiment

[0024] Example 3

[0025] The commercially available metal zinc flakes with a purity greater than 99.9%, a thickness of 0.1 cm, and an area of ​​1 cm × 1 cm were cleaned in ultrasonic waves with distilled water, absolute ethanol and acetone, and the cleaned zinc flakes were placed in 20 ml of polytetrafluoroethylene. In the lined autoclave, add 4ml of distilled water, seal the container, put it into a 180°C thermostat for 4h reaction, take out the zinc flakes after cooling and dry to obtain a zinc oxide film. Curve 3 in accompanying drawing 1 is the X-ray diffractogram of the obtained product, as can be seen from the figure, the obtained product diffraction peaks are all the diffraction peaks of zinc oxide except the diffraction peaks of the base zinc flakes, and there is no redundant impurity peaks. In this patent, the activity of zinc oxide is evaluated by the degradation rate of the zinc oxide film in photocatalytic degradation of methyl orange under ultraviolet light. Cur...

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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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