Silkworm excrement porous carbon MOFs composite material with high specific surface and preparation method and application thereof

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

Active Publication Date: 2017-02-22
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 with high specific surface and preparation method and application thereof
  • Silkworm excrement porous carbon MOFs composite material with high specific surface and preparation method and application thereof
  • Silkworm excrement porous carbon MOFs composite material with high specific surface and preparation method and application thereof

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Experimental program
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Embodiment 1

[0040] A preparation method of silkworm excrement porous carbon MOFs composite material with high specific surface area, 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 obt...

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 with a high specific surface and a preparation method and application thereof. First, silkworm excrement and a ZnCl2 solution are mixed and swelled and then frozen and dried; then the frozen and dried silkworm excrement is subjected to an active pore expanding reaction, cleaned, centrifuged and dried to obtain a silkworm excrement-based multi-stage pore carbon material; next, a metal salt solution and the material are stirred and mixed and then centrifuged and dried; under the condition of plasma modification, oxygen is injected to form a high-dispersion metal oxide on the surface of the silkworm excrement-based multi-stage pore carbon material, then through a microwave irradiation method, MOFs are grown on the surface of the silkworm excrement-based carbon material with the high-dispersion metal oxide being a precursor, and finally the silkworm excrement porous carbon MOFs composite material with the high specific surface is obtained after suction filtration and drying. The material can be applied to pesticide slow controlled release. The obtained composite carbon material has the high specific surface and carboxyl groups, and can achieve the effects of high adsorption capacity and good slow controlled release.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and in particular relates to a high specific surface 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 func...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/32A01N25/08A01N51/00A01P7/04
CPCA01N25/08A01N51/00B01J20/226B01J20/28066B01J20/3204
Inventor 赵钟兴魏雅男孙华菊赵祯霞
Owner GUANGXI UNIV
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