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Preparation method for photodegradation source nano pesticide preparation

A nano-pesticide and nano-preparation technology, applied in botany equipment and methods, biocides, animal repellents, etc., can solve the problems of difficult catalyst recovery, easy deactivation of catalysts, large processing capacity, etc., to improve bioavailability , delay the effective time, increase the effect of affinity

Inactive Publication Date: 2015-11-18
丁德凤
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AI Technical Summary

Problems solved by technology

[0003] Photocatalytic degradation of residual pesticides and other organic pollutants in wastewater is currently a hot research topic in environmental protection. As we all know, in the process of photocatalytic wastewater treatment, there are defects such as low efficiency, large processing capacity, easy deactivation of catalysts, and difficulties in catalyst recovery. Solve the pollution problem fundamentally

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Heat 200ml of saturated stearic acid solution to 60°C, stir vigorously, add 4gAg / TiO2, continue stirring for 6h, centrifuge the suspension at high speed, and dry at 100°C;

[0013] (2) Dissolve 10% chlorfenapyr in 22.8% toluene, add surfactants E-40, s-80 and surface-modified nano-Ag / TiO2, mix evenly, under high-speed shear stirring, add appropriate amount water, the stable chlorfenapyr nano-preparation was obtained.

[0014] Based on the above, compared with conventional pesticides, the nano-pesticide prepared by the technical scheme of the present invention has small particle size, large specific surface area, strong affinity to the substrate, and increased contact time and contact area with the substrate after application. The bioavailability of the pesticide can be improved, and the pesticide and its additive can be photocatalytically degraded into biodegradable small molecules and non-toxic inorganic substances under the action of sunlight. The surface of the ...

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Abstract

The invention discloses a preparation method for a photodegradation source nano pesticide preparation, and relates to the technical field of environmental protection. The preparation method comprises surface modification of a photocatalyst and preparation of a nano preparation. According to the preparation method provided by the invention, a surface of Ag / TiO2 is modified by use of stearate, and the surface of the Ag / TiO2 is changed to be lipophilic from hydrophilic; and chlorfenapyr pesticide, modified Ag / TiO2 and corresponding additives are mixed to prepare the nano pesticide preparation which is relatively uniform in particle distribution, and has an average particle size of about 100 nm. A photocatalytic degradation property, insecticidal activity, and residual toxicily in soil and plants of the nano preparation are good, so the photodegradation source nano pesticide preparation has a high popularization and application value.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for preparing a photodegradation source nanopesticide preparation. Background technique [0002] With the rapid development of our country's economy, the industrialization of agricultural production, and the wider use of pesticides, the resulting environmental problems have become increasingly serious. [0003] Photocatalytic degradation of residual pesticides and other organic pollutants in wastewater is currently a hot research topic in environmental protection. As we all know, in the process of photocatalytic wastewater treatment, there are defects such as low efficiency, large processing capacity, easy deactivation of catalysts, and difficulties in catalyst recovery. Fundamentally solve the pollution problem. The most effective way to solve pesticide pollution is to develop composite nano-photodegradable source pesticides, so that the residual pesti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/36A01N25/04A01N25/32
Inventor 丁德凤
Owner 丁德凤
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