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Nano-selenium composite avermectin selenium-rich pesticide and preparation method thereof

A technology of selenium-enriched pesticides and abamectin, which is applied in the fields of botanical equipment and methods, nanotechnology, elemental selenium/tellurium, etc., can solve the problem that there is no good solution for the degradation of abamectin pesticides, the degradation efficiency is low, and the pesticide residues and other problems, to achieve the effects of environmentally friendly chemical residue time, simple process methods, and easy industrial production

Inactive Publication Date: 2016-08-24
HEZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in order to solve the problem of pesticide residues, there is no good solution for the degradation of abamectin pesticides. Although nano-materials are used to degrade abamectin, the degradation efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 1. Dissolve selenous acid in distilled water to form a selenous acid solution with a molar concentration of 0.1mol / L. Add 0.01 times the molar amount of selenous acid to the selenous acid solution. Shake with a shaker for 10 minutes, then add ascorbic acid solution with a molar concentration of 0.1 mol / L that is 2 times the molar amount of selenous acid, shake with a shaker for 1 minute, and then add sodium sulfite with a molar concentration of 0.1 mol / L that is 1% of the volume of the above solution solution and adjust the pH to 3, control the temperature of the water bath at 12°C and react for 0.1h to obtain a precipitate;

[0013] 2. Centrifuge the precipitate, take the precipitate and wash it once with deionized water, then wash it once with absolute ethanol to obtain elemental selenium, dry the obtained elemental selenium in vacuum at 10°C for 1 hour, and then place it in a nitrogen-protected Ball milling in a ball mill for 2 hours to obtain nano-selenium;

[0014...

Embodiment 2

[0017] 1. Dissolve selenous acid in distilled water to form a selenous acid solution with a molar concentration of 2.0mol / L. Add 0.06 times the molar amount of selenous acid to the selenous acid solution. Shake with a shaker for 15 minutes, then add ascorbic acid solution with a molar concentration of 3.2 mol / L that is 3 times the molar amount of selenous acid, shake with a shaker for 10 minutes, and then add sodium sulfite with a molar concentration of 2.0 mol / L that is 1% of the volume of the above solution solution and adjust the pH to 5, control the temperature of the water bath at 25°C for 0.3h to obtain a precipitate;

[0018] 2. Centrifuge the precipitate, take the precipitate and wash it with deionized water for 3 times, and then wash it with absolute ethanol for 3 times to obtain elemental selenium. Vacuum dry the obtained elemental selenium at 60°C for 4 hours, and then place it in a nitrogen-protected environment. Ball milling in a ball mill for 3 hours to obtain na...

Embodiment 3

[0022] 1. Dissolve selenous acid in distilled water to form a selenous acid solution with a molar concentration of 3.1mol / L. Add 0.1 times the molar amount of selenous acid to the selenous acid solution. Shake with a shaker for 20 minutes, then add ascorbic acid solution with a molar concentration of 5.2 mol / L that is 4 times the molar amount of selenous acid, shake with a shaker for 20 minutes, and then add sodium sulfite with a molar concentration of 3.0 mol / L that is 1% of the volume of the above solution solution and adjust the pH to 6, control the temperature of the water bath at 38°C for 0.5h to obtain a precipitate;

[0023] 2. Centrifuge the precipitate, take the precipitate and wash it with deionized water for 5 times, and then wash it with absolute ethanol for 5 times to obtain elemental selenium. Vacuum dry the obtained elemental selenium at 100°C for 8 hours, and then place it in a nitrogen-protected environment. Ball milling in a ball mill for 4 hours to obtain na...

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Abstract

The invention discloses nano-selenium composite avermectin selenium-rich pesticide and a preparation method thereof and belongs to the technical field of composite pesticides. The technical scheme of the invention is characterized in that the nano-selenium composite avermectin selenium-rich pesticide is obtained by: dissolving nano-selenium in deionized water, stirring and mixing at 10-50 DEG C for 15 min to obtain nano-selenium suspension, adding the nano-selenium suspension into ethanol solution of stearic acid to obtain stearic acid-modified nano-selenium powder, adding the stearic acid-modified nano-selenium powder and petroleum ether into avermectin emulsifiable concentrate 5% in mass fraction, adding deionized water solution containing sodium dodecyl sulfate 10% in mass fraction, and stirring and mixing at 25-65 DEG C for 35-60 min. The method of the invention is simple and is easy to use in industrial production, and the nano-selenium composite avermectin selenium-rich pesticide has the advantages such as environment-friendliness and short chemical residue time.

Description

technical field [0001] The invention belongs to the technical field of compound pesticides, and in particular relates to a nano-selenium compound abamectin selenium-enriched pesticide and a preparation method thereof. Background technique [0002] At present, in order to solve the problem of pesticide residues, there is no good solution for the degradation of abamectin pesticides. Although nano-materials are used to degrade abamectin, the degradation efficiency is low. Therefore, there is a need to develop a pesticide that can improve the efficiency of degrading abamectin, which can not only play an insecticidal effect, but also shorten the residual time in crops. Contents of the invention [0003] The technical problem solved by the invention is to provide a nano-selenium composite avermectin selenium-enriched pesticide and a preparation method thereof. [0004] The present invention adopts following technical scheme for solving the above-mentioned technical problem, a k...

Claims

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Application Information

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IPC IPC(8): A01N25/32A01N43/90A01P7/04C01B19/02B82Y40/00
CPCA01N25/32A01N43/90B82Y40/00C01B19/02
Inventor 陈政高友君
Owner HEZHOU UNIV
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