Silkworm excrement porous carbon MOFs composite material, preparation method thereof and application

A composite material, porous carbon technology, applied in the field of carbon materials, can solve the problems of non-target biological damage to the environment, excessive pesticide residues in agricultural products, low pesticide utilization efficiency, etc. rate effect

Active Publication Date: 2017-05-10
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only a small amount of pesticides can reach the crop target site in a specific time, and most of the pesticides are directly released into the natural environment, resulting in low pesticide utilization efficiency
These ineffective pesticides will cause many negative problems such as excessive pesticide residues in agricultural products, damage to non-target organisms, and environmental pollution.

Method used

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  • Silkworm excrement porous carbon MOFs composite material, preparation method thereof and application
  • Silkworm excrement porous carbon MOFs composite material, preparation method thereof and application
  • Silkworm excrement porous carbon MOFs composite material, preparation method thereof and application

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Experimental program
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Effect test

Embodiment 1

[0040] A preparation method of silkworm excrement porous carbon MOFs composite material, comprising the following steps,

[0041] (1) The original silkworm excrement and the ZnCl of mass concentration 0.25g / mL 2 The solution was mixed and swollen at 30°C according to the plastid ratio of 1:100 for 3.0h, then the silkworm excrement was fished out, and the silkworm excrement was freeze-dried, first frozen at -20°C for 4h, and then cooled to -60°C for freezing. Dry for 24 hours to obtain freeze-dried silkworm excrement.

[0042] (2) freeze-dried silkworm excrement in N 2 In the atmosphere, the temperature was raised to 300°C at a rate of 5°C / min, and kept at 300°C for 5.0h to carry out the pore expansion reaction. After naturally cooling down to room temperature, the obtained solid was dissolved in 1mol / L HCl to wash and dissolve ZnCl 2 , and then washed with deionized water to pH ≈ 7, then centrifuged, placed in an oven to dry overnight, and obtained the silkworm excrement-bas...

Embodiment 2

[0047] (1) The original silkworm excrement and the ZnCl of mass concentration 0.25g / mL 2 The solution was mixed and swollen at 35°C according to the plastid ratio of 1:120 for 2.5 hours, and then the silkworm excrement was fished out, and the silkworm excrement was freeze-dried. It was first frozen at -20°C for 3 hours, and then cooled to -55°C. Dry for 36 hours to obtain freeze-dried silkworm excrement.

[0048] (2) Raise the freeze-dried silkworm excrement to 350°C at a heating rate of 5°C / min in an Ar atmosphere, and keep it at 350°C for 4.0h to carry out the pore expansion reaction. After naturally cooling down to room temperature, dissolve the obtained solid Wash and dissolve ZnCl in 1mol / L HCl 2 , and then washed with deionized water to pH ≈ 7, then centrifuged, placed in an oven to dry overnight, and obtained the silkworm excrement-based hierarchical porous carbon material after drying.

[0049] (3) Combine the silkworm excrement-based hierarchical porous carbon mater...

Embodiment 3

[0053] (1) The original silkworm excrement and the ZnCl of mass concentration 0.30g / mL 2 The solution was mixed and swollen at 40°C according to the plastid ratio of 1:140 for 2.0h, and then the silkworm excrement was fished out, and the silkworm excrement was freeze-dried, firstly frozen at -25°C for 2h, and then cooled to -50°C for freezing. Dry for 48 hours to obtain freeze-dried silkworm excrement.

[0054] (2) freeze-dried silkworm excrement in N 2 In the atmosphere, the temperature was raised to 400°C at a rate of 5°C / min, and kept at 400°C for 3.0h to carry out the pore expansion reaction. After the natural temperature dropped to room temperature, the obtained solid was dissolved in 1mol / L HCl to wash and dissolve ZnCl 2 , and then washed with deionized water to pH ≈ 7, then centrifuged, placed in an oven to dry overnight, and obtained the silkworm excrement-based hierarchical porous carbon material after drying.

[0055] (3) Combine the silkworm excrement-based hiera...

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Abstract

The invention discloses a silkworm excrement porous carbon MOFs composite material, a preparation method thereof and an application. The preparation method includes steps of freeze-drying silkworm excrement with ZnCl2 solution after being mixed and swelled; and then performing activated chambering reaction on the freeze-dried silkworm excrement in a protection gas; and then cleaning, centrifuging and drying the silkworm excrement; and acquiring the silkworm excrement based porous carbon material; centrifuging and drying metal salt solution with material after being stirred and mixed; under the plasma modification condition, charging oxygen to the surface of the silkworm excrement based porous carbon material and forming a high-dispersing metal oxide; through a hydrothermal synthesis method, applying the high-dispersing metal oxide as a precursor; growing the MOFs on the surface of the silkworm excrement based carbon material; at last, filtering and drying the MOFs and acquiring the silkworm excrement porous carbon MOFs composite material. The composite carbon material is high in specific surface area and carboxyl radical, and has high absorption capacity and good controlled release effects for pesticide.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a silkworm excrement porous carbon MOFs composite material and a preparation method and application thereof. Background technique [0002] Pesticides can effectively control the harm of diseases, insects, weeds and other harmful organisms to crops. As an important means of chemical control, pesticides play an irreplaceable role in agricultural production. However, only a small amount of pesticides can reach the crop target site in a specific time, and most of the pesticides are directly released into the natural environment, resulting in low pesticide utilization efficiency. These ineffective pesticides will cause many negative problems such as excessive pesticide residues in agricultural products, damage to non-target organisms, and environmental pollution. How to effectively improve the utilization efficiency and targeted release function of pesticides is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N51/00A01P7/04B01J20/30B01J20/22B01J20/28
Inventor 赵钟兴王欣辉陶萌良赵祯霞
Owner GUANGXI UNIV
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