Method for photocatalytic degradation of pesticide residues

A technology for degrading pesticides and pesticide residues, applied in the field of degradation and removal of pesticide residues, can solve the problems of optical pollution, difficulty in realization, and limited range of pesticide residues, and achieve the effects of low cost, high absorption strength, and simple manufacturing process

Active Publication Date: 2013-03-13
CHINA TOBACCO FUJIAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods are ubiquitous: (1) The synthesized photocatalytic materials have no absorption in the visible light region, and need to be equipped with ultraviolet lamps, resulting in optical pollution; (2) require special equipment, which is difficult to achieve in the production process; (3) can degrade The limited range of pesticide residues and other issues

Method used

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  • Method for photocatalytic degradation of pesticide residues
  • Method for photocatalytic degradation of pesticide residues
  • Method for photocatalytic degradation of pesticide residues

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Dissolve 0.008mol of urea in 40ml of absolute ethanol, mix 0.004mol of butyl titanate and 0.5ml of glacial acetic acid in a 100ml small beaker, then add the ethanol solution of urea dropwise to the butyl titanate under the condition of magnetic stirring Cool and glacial acetic acid in a beaker, after dripping, then magnetically stir for 5min, then transfer the transparent mixed solution to a 50ml polytetrafluoroethylene-lined reaction kettle, put it in a constant temperature box, and keep it at a constant temperature of 150°C After keeping for 18 hours, take it out and cool it down to room temperature naturally. The white precipitate was washed out by centrifugation with distilled water and absolute ethanol, and dried in a drying oven for use.

[0024] Take 1g of synthesized TiO 2 Add the powder and zinc acetate into 120ml of distilled water (Zn / Ti molar ratio is 1:1), place it in an ultrasonic instrument for 20 minutes, then slowly add 0.35M sodium hydroxide solution ...

Embodiment 2

[0026] Dissolve 0.016mol of urea in 80ml of absolute ethanol, mix 0.008mol of butyl titanate and 1.0ml of glacial acetic acid in a 250ml small beaker, and then add the ethanol solution of urea dropwise to the butyl titanate under the condition of magnetic stirring Cool and glacial acetic acid beaker, after dripping, then magnetically stir for 10min, then transfer the transparent mixture to a 100ml polytetrafluoroethylene-lined reaction kettle, put it in a constant temperature box, and keep it at a constant temperature of 150°C After keeping for 24 hours, take it out and cool it down to room temperature naturally. The white precipitate was washed out by centrifugation with distilled water and absolute ethanol, and dried in a drying oven for use.

[0027] Take 3g of synthesized TiO 2 Add the powder and zinc acetate into 120ml of distilled water (Zn / Ti molar ratio is 1:1), place it in an ultrasonic instrument for 20 minutes, then slowly add 0.35M sodium hydroxide solution under ...

Embodiment 3

[0029]Dissolve 0.008mol of urea in 40ml of absolute ethanol, mix 0.004mol of butyl titanate and 0.5ml of glacial acetic acid in a 100ml small beaker, then add the ethanol solution of urea dropwise to the butyl titanate under the condition of magnetic stirring Cool and glacial acetic acid in a beaker, after dripping, then magnetically stir for 5min, then transfer the transparent mixed solution to a 50ml polytetrafluoroethylene-lined reaction kettle, put it in a constant temperature box, and keep it at a constant temperature of 150°C After keeping for 18 hours, take it out and cool it down to room temperature naturally. The white precipitate was washed out by centrifugation with distilled water and absolute ethanol, and dried in a drying oven for use.

[0030] Take 8g of synthesized TiO 2 Add the powder and zinc acetate into 120ml of distilled water (Zn / Ti molar ratio is 1:1), place it in an ultrasonic instrument for 30 minutes, then slowly add 0.35M sodium hydroxide solution u...

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Abstract

The invention relates to a method for photocatalytic degradation of pesticide residues. The method is characterized by: taking butyl titanate, zinc acetate, urea and the like as raw materials, conducting co-precipitation to synthesize a ZnO/TiO2 composite nano-material with photocatalytic activity, spraying the composite nano-material on plants, and making use of sunlight irradiation to degrade pesticide residues. The material has high absorption strength and strong photocatalytic activity in both ultraviolet and visible ranges, and has the characteristics of obvious degradation effects, simple operation and low cost when used in pesticide residue degradation, thus having wide application and popularization value.

Description

technical field [0001] The invention relates to a method for degrading and removing pesticide residues, in particular to a method for photocatalytically degrading pesticide residues. Background technique [0002] Pesticides play an extremely important role in the production and preservation of agriculture and animal husbandry, as well as the prevention and control of infectious diseases. However, the residual pesticides will also have a negative impact on human health. If they accumulate in the human body to a certain dose, they will cause acute or chronic poisoning to the human body, and even produce highly carcinogenic, teratogenic, and mutagenic effects. At present, some developed countries have established regulations on the maximum limit of pesticide residues, which have become an invisible technical barrier. It can be seen that controlling and reducing pesticide residues is necessary both from the perspective of being responsible to consumers and from the perspective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06A62D3/17A62D101/04A62D101/20
Inventor 张建平吴清辉邓其馨黄朝章徐小青叶仲力周培琛许寒春谢卫苏明亮白雪平赵艺强蔡国华赖炜扬
Owner CHINA TOBACCO FUJIAN IND
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