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Preparation method of nanometer zinc oxide photochemical catalyst with visible light photocatalytic activity

A technology of nano-zinc oxide and photocatalytic activity, applied in the field of semiconductor material technology and the environment, can solve the problem of no photocatalytic activity, and achieve the effects of saving energy, improving photocatalytic efficiency, and simplifying steps

Inactive Publication Date: 2011-10-19
沈斌斌
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing photocatalytic performance, especially to provide a method for preparing iron-doped zinc oxide nanocrystals with almost no photocatalytic activity in the visible light region

Method used

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Examples

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Embodiment

[0023] Weigh 0.27g FeCI 3 ·6H 2 O, put in a beaker, add 1mL HCI solution, dilute with distilled water and prepare 250mL 10mmol / L stock solution.

[0024] Weigh 1.1g Zn(Ac) 2 ·2H 2 O and 0.3g LiOH·H 2 O was dissolved in absolute ethanol, and 5mL of ferric chloride stock solution was slowly added dropwise to Zn(Ac) under cooling and stirring. 2 Solution, then slowly drop the LiOH solution to Zn(Ac) 2 In the solution, heat and concentrate to 80mL, then add 4.0mL of 0.05mol / L polyethylene glycol 400 solution, and mix well.

[0025] A constant temperature of 120°C in the drying box was kept for 24 hours, and after being naturally cooled to room temperature, the precipitate was obtained by centrifugal separation.

[0026] It was cleaned several times by ultrasonic centrifugation with deionized water, and dried at 60°C to obtain Fe¨-doped zinc oxide powder samples.

[0027] The crystal size of the nano zinc oxide powder obtained in this embodiment is approximately between 10 nm and 20 nm.

[0...

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Abstract

The invention provides a preparation method of an iron-doped nanometer zinc oxide crystal, aiming at overcoming the shortcoming of the traditional photocatalytic property and particularly solving the problem that the photocatalytic activity is hardly available in a visible light region. The preparation method has the advantages of simplicity, low cost and rapid reaction speed; and the nanometer zinc oxide prepared by the invention has very good photocatalysis capability in the visible light and the grain size of 5 nanometers to 50 nanometers and can be used for preparing high-performance materials related to solar energy.

Description

[Technical Field] [0001] The invention relates to the field of semiconductor material technology and environment, in particular to a preparation method of a nano zinc oxide photocatalyst with visible light photocatalytic activity. [Background technique] [0002] Zinc oxide is a new wide-bandgap (approximately 3.3eV) semiconductor material with many superior properties. It is also a new environmentally friendly material that has been widely studied at present. Because of its non-toxic and low cost advantages, it is widely used in the field of photocatalysis . It can destroy a variety of organic pollutants through photo-assisted catalysis; ultimately oxidize difficult-to-degrade organics into inorganic substances such as carbon dioxide and water; and can oxidize and remove almost all organic pollutants in water. Studies have shown that the reaction speed of nano zinc oxide particles is 100-1000 times that of ordinary zinc oxide particles, and compared with ordinary particles, it h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/02B01J35/00
Inventor 沈斌斌
Owner 沈斌斌
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