Nano-zinc oxide composite triazophos pesticide and preparation method therefor

A technology of nano-zinc oxide and compound triazophos, applied in the field of pesticides, can solve the problems of low degradation efficiency, high toxicity of triazophos pesticide residues and the like

Inactive Publication Date: 2015-09-23
HEZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a nano-zinc oxide composite triazophos pesticide and its preparation method, aiming at solving the problems of high residual toxicity and low degradation efficiency of the existing triazophos pesticide on fruits and vegetables

Method used

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  • Nano-zinc oxide composite triazophos pesticide and preparation method therefor
  • Nano-zinc oxide composite triazophos pesticide and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 1kg of urea is added to the zinc nitrate solution of 5kg of 0.1mol / L, and in a water bath, under 98 ℃ of reaction temperatures, the reaction is obtained for 0.5h to obtain a precipitate;

[0019] (2) The precipitate was collected by centrifugation, washed once with deionized water, and then washed with absolute ethanol for 5 times to obtain a zinc oxide precursor. The iron oxide precursor was dried at a temperature of 60 ° C for 8 hours, and then dried at 410 ° C. Calcined at the temperature for 4h to obtain nano-zinc oxide powder 1.

Embodiment 2

[0021] (1) 1kg urea is added in the zinc nitrate solution of 2kg 3mol / L, in a water bath, under 62 ℃ of reaction temperatures, the reaction 3h obtains a precipitate;

[0022] (2) The precipitate was collected by centrifugation, washed with deionized water for 5 times, and then washed with absolute ethanol once to obtain a zinc oxide precursor. The iron oxide precursor was dried at 180 ° C for 1 hour, and then placed After calcination at 820°C for 2 hours, nano-zinc oxide powder 2 was obtained.

Embodiment 3

[0024] (1) 1kg urea is added to the zinc nitrate solution of 3kg 1mol / L, and in a water bath, under 80 ℃ of reaction temperatures, react 2h to obtain a precipitate;

[0025] (2) The precipitate is collected by centrifugation, washed with deionized water for 3 times, and then washed with absolute ethanol for 3 times to obtain a zinc oxide precursor, and the iron oxide precursor is dried at a temperature of 100 ° C for 5 hours. After calcination at 620°C for 3 hours, nano-zinc oxide powder 3 was obtained.

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Abstract

The invention provides a nano-zinc oxide composite triazophos pesticide and a preparation method therefor. The preparation method comprises the following steps: mixing and stirring nano-zinc oxide and deionized water to obtain a nano-zinc oxide suspension liquid; mixing the nano-zinc oxide suspension liquid with a stearic acid soluble ethanol solution, stirring for 30-70 min at the temperature of 56-79 DEG C, performing decompression suction filtration, washing, drying and room temperature cooling on the stirred solution, and grinding for 10-30 minutes to obtain stearic acid modified nano-zinc oxide powder; mixing the stearic acid modified nano-zinc oxide powder with Awei triazophos with the mass fraction of 20% and Awei triazophos cyclohexanone with the mass fraction of 20% to obtain a first mixed solution, then mixing the first mixed solution with a lauryl sodium sulfate solution to obtain a second mixed solution, and stirring the second mixed solution for 30-70 min at the temperature of 27-69 DEG C to obtain the nano-zinc oxide composite triazophos pesticide. The nano-zinc oxide composite triazophos pesticide provided by the invention is simple in preparation method, environment-friendly and short in chemical residence time.

Description

technical field [0001] The invention belongs to the technical field of pesticides, in particular to a nano-zinc oxide composite triazophos pesticide and a preparation method thereof. Background technique [0002] Triazophos is a moderately toxic, broad-spectrum organophosphorus insecticide, which is widely used as one of the main substitutes for five highly toxic pesticides, especially for rice borers. However, the half-life of triazophos is long, and it will inevitably cause water pollution and ecological damage during its use. At the end of 2013, the Ministry of Agriculture banned the use of triazophos on vegetables due to the risk of excessive residues of triazophos on vegetables. [0003] At present, there is no good solution for the degradation of triazophos pesticides. Although nanomaterials are used to degrade triazophos, the degradation efficiency is low. Therefore, it is necessary to develop a stable pesticide that can improve the degradation efficiency of triazoph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/16A01N25/32A01P7/04
Inventor 陈政高友君
Owner HEZHOU UNIV
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