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Preparation method and application of solid zinc oxide microspheres

A zinc oxide, solid technology, applied in the field of preparation of solid zinc oxide microspheres, can solve the problems of limited nano-zinc oxide photocatalysts, uneven particle size distribution, difficult to control parameters, etc., to improve the photocatalytic efficiency, uniform distribution, rough surface effect

Active Publication Date: 2020-11-10
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main methods for preparing zinc oxide semiconductor photocatalysts are chemical precipitation method and sol-gel method. The shortcomings of different diameter distribution and easy agglomeration limit the practical application of nano-zinc oxide photocatalysts.
The sol-gel method has the disadvantages of expensive raw materials, long preparation cycle, and easy to produce secondary pollution during the process.

Method used

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  • Preparation method and application of solid zinc oxide microspheres
  • Preparation method and application of solid zinc oxide microspheres
  • Preparation method and application of solid zinc oxide microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 3.1647g of cetyltrimethylammonium bromide and dissolve it in 40ml of absolute ethanol, ultrasonically dissolve for 20 minutes, then add 2.2001g of zinc acetate dihydrate, ultrasonically dissolve for 30 minutes, add 0.6033g of urea, ultrasonically dissolve for 50 minutes, and finally Transfer the mixed solution into the inner lining of the polytetrafluoroethylene reactor, raise the oven from room temperature to 140°C at 2 min / °C, and react for 4 hours. After the oven was cooled to room temperature, the sample was taken out for suction filtration, washed with absolute ethanol and water, and dried at 60°C for 10 hours to obtain solid zinc oxide microspheres.

[0029] figure 1 For the preparation of solid zinc oxide microsphere scanning electron micrograph in this example, figure 2 For its partial enlarged view, from figure 2 It can be seen that the surface of solid zinc oxide microspheres is rough, the particle size is micron, and the specific surface area is larg...

Embodiment 2

[0034] Take 2.1868g of cetyltrimethylammonium bromide and dissolve it in 40ml of absolute ethanol, ultrasonically dissolve for 20 minutes, then add 2.1946g of zinc acetate dihydrate for ultrasonic dissolution for 30 minutes, then add 0.6009g of urea for ultrasonic dissolution for 30 minutes, and finally put The mixed solution was transferred into the lining of a polytetrafluoroethylene reactor, and the oven was raised from room temperature to 140°C at 2 min / °C for 6 hours to react. After the oven was cooled to room temperature, the sample was taken out for suction filtration, washed with absolute ethanol and water, and dried at 60°C for 10 hours to obtain solid zinc oxide microspheres.

Embodiment 3

[0036] Take 2.9146g of cetyltrimethylammonium bromide and dissolve it in 40ml of absolute ethanol, ultrasonically dissolve for 20 minutes, then add 2.2001g of zinc acetate, ultrasonically dissolve for 30 minutes, weigh and add 0.6033g of urea, ultrasonically dissolve for 50 minutes, and finally Transfer the mixed solution into the lining of a polytetrafluoroethylene reactor, and raise the oven from room temperature to 140°C at 2 min / °C for 8 hours to react. After the oven was cooled to room temperature, the sample was taken out for suction filtration, washed with absolute ethanol and water, and dried at 60°C for 10 hours to obtain solid zinc oxide microspheres.

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Abstract

The invention provides a preparation method and application of solid zinc oxide microspheres, and belongs to the technical field of photocatalyst preparation. According to the preparation method, hexadecyl trimethyl ammonium bromide is used as a surfactant, urea is promoted to be volatilized into ammonia gas at high temperature, the ammonia gas is mixed with zinc salt in a system for reaction, thezinc oxide microspheres with solid structures are obtained through one-time forming, the preparation method is simple, and reaction raw materials are low in price; the prepared solid zinc oxide microsphere has a large specific surface area, and has a wide application prospect in catalytic degradation of tetracycline hydrochloride under visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst preparation, and in particular relates to a preparation method and application of solid zinc oxide microspheres. Background technique [0002] With the rapid development of printing and dyeing, pharmaceutical, chemical and other industries, a large amount of organic dye wastewater with high concentration, high toxicity and poor biodegradability has emerged, seriously polluting the water ecological environment and endangering human health. At present, the photocatalytic degradation of organic pollutants in industrial wastewater by using semiconductor materials is regarded as one of the most potential and valuable pollution control methods. [0003] Zinc oxide semiconductor photocatalyst generates electrons and holes under light conditions, and the photogenerated electrons and holes can be converted into active groups with strong oxidizing ability such as superoxide radicals and hydroxyl radic...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J35/08B01J35/10B01J35/02C02F1/30C02F101/38
CPCB01J23/06C02F1/30C02F2305/10C02F2101/38B01J35/51B01J35/40B01J35/39B01J35/61Y02W10/37
Inventor 张颖李文旭张存刘宇晴李苏黄艳崔玉民苗慧李慧泉
Owner FUYANG NORMAL UNIVERSITY
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