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 degradati

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Example 1

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

[0013] 2. Centrifuge the precipitate, take the precipitate and wash it with deionized water once, and then wash it with absolute ethanol once to obtain elemental selenium. The obtained elemental selenium is vacuum dried at 10°C for 1 hour, and then placed in a nitrogen-protected 2h ball milling in the ball mill to obtain nano-seleniu...

Example Embodiment

[0016] Example 2

[0017] 1. Dissolve selenous acid in distilled water to form a selenous acid solution with a molar concentration of 2.0 mol / L. Add 0.06 times the molar amount of sodium lauryl sulfate to the selenous acid solution at 30°C. Shake with a shaker for 15 minutes, then add 3 times the molar amount of selenite acid ascorbic acid solution with a molar concentration of 3.2mol / L, shake for 10 minutes with a shaker, and then add 1% of the above solution volume with a molar concentration of 2.0mol / L sodium sulfite Adjust the pH of the solution to 5, and control the temperature of the water bath at 25°C to react for 0.3h to obtain a precipitate;

[0018] 2. Centrifuge the precipitate, take the precipitate and wash it with deionized water 3 times, and then wash it with absolute ethanol 3 times to obtain elemental selenium. The obtained elemental selenium is vacuum dried at 60℃ for 4h, and then placed in a nitrogen-protected 3h ball milling in the ball mill to obtain nano-selen...

Example Embodiment

[0021] Example 3

[0022] 1. Dissolve selenite in distilled water to form a selenite solution with a molar concentration of 3.1 mol / L. Add 0.1 times the molar amount of sodium lauryl sulfate to the selenite solution at 50°C Shake with a shaker for 20 minutes, then add 4 times the molar amount of selenite acid ascorbic acid solution with a molar concentration of 5.2mol / L, shake for 20 minutes with a shaker, and then add 1% of the above solution volume with a molar concentration of 3.0mol / L sodium sulfite Adjust the pH of the solution to 6, and control the temperature of the water bath to react 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 5 times to obtain elemental selenium. The obtained elemental selenium is vacuum dried at 100°C for 8 hours, and then placed in a nitrogen-protected Nano-selenium is obtained by ball milling in a ball mill fo...

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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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