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Dopamine-silkworm excrement composite carbon material high in specific surface area and preparation method and application thereof

A dopamine silkworm, high specific surface technology, applied in the direction of botanical equipment and methods, applications, chemical instruments and methods, etc., can solve the problems of non-target biological damage environment, excessive pesticide residues in agricultural products, and low efficiency of pesticide utilization, etc., and achieve reduction Effects of waste liquid discharge, high adsorption capacity, and efficiency improvement

Active Publication Date: 2017-02-15
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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  • Dopamine-silkworm excrement composite carbon material high in specific surface area and preparation method and application thereof
  • Dopamine-silkworm excrement composite carbon material high in specific surface area and preparation method and application thereof
  • Dopamine-silkworm excrement composite carbon material high in specific surface area and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a high specific surface dopamine silkworm excrement composite material, comprising the following steps,

[0031] (1) in N 2 In the atmosphere, 10.0 g of raw silkworm excrement was raised to 500°C at a heating rate of 5°C / min, kept at 500°C for more than 5.0 hours, and then cooled to room temperature to prepare carbonized silkworm excrement.

[0032] (2) Put 0.25g of dopamine hydrochloride powder and 0.25g of carbonized silkworm excrement into a ball mill jar, add 1.0mL of ZnCl with a mass concentration of 0.25g / L 2 solution; the ball mill jar is sealed and placed in a high-speed mechanical oscillating ball mill to oscillate, the rotating speed is 1000 rpm, and the grafting reaction time is 60min (normal pressure sealing is carried out in the reaction process); the obtained dopamine / ZnCl 2 / Silkworm excrement composite slurry is directly dried at 80°C to obtain crude composite material;

[0033] (3) the obtained composite material crude product i...

Embodiment 2

[0035] (1) in N 2 In the atmosphere, 10.0 g of raw silkworm excrement was raised to 600°C at a heating rate of 5°C / min, kept at 600°C for more than 4.0 hours, and then cooled to room temperature to prepare carbonized silkworm excrement.

[0036] (2) 0.25g of dopamine hydrochloride powder and 0.5g of carbonized silkworm excrement are placed in a ball mill jar, and 3.0mL of ZnCl with a mass concentration of 0.30g / L is added 2 solution; the ball mill jar is sealed and placed in a high-speed mechanical oscillating ball mill to oscillate, the rotating speed is 1050 rpm, and the grafting reaction time is 50min (normal pressure sealing is carried out in the reaction process); the obtained dopamine / ZnCl 2 / Silkworm excrement composite slurry was directly dried at 80°C to obtain crude composite material.

[0037] (3) the obtained composite material crude product in step (2) in N 2 In the atmosphere, the temperature was raised to 550°C at a rate of 5°C / min, and kept at 550°C for 4.0 h...

Embodiment 3

[0039] (1) in N 2 In the atmosphere, 10.0g of raw silkworm excrement was raised to 700°C at a heating rate of 5°C / min, kept at 600°C for more than 3.0h, and then cooled to room temperature to prepare carbonized silkworm excrement.

[0040] (2) 0.25g of dopamine hydrochloride powder and 0.75g of carbonized silkworm excrement are placed in a ball mill jar, and 5.5mL of ZnCl with a mass concentration of 0.25g / L is added 2 solution; the ball mill jar is sealed and placed in a high-speed mechanical oscillating ball mill to oscillate, the rotating speed is 1100 rpm, and the grafting reaction time is 45min (normal pressure sealing is carried out in the reaction process); the obtained dopamine / ZnCl 2 / Silkworm excrement composite slurry was directly dried at 90°C to obtain crude composite material.

[0041] (3) the obtained composite material crude product in step (2) in N 2 In the atmosphere, the temperature was raised to 600°C at a rate of 5°C / min, and kept at 600°C for 3.0 hours....

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Abstract

The invention discloses a dopamine-silkworm excrement composite carbon material high in specific surface area and a preparation method and application thereof. The preparation method includes: preparing raw silkworm excrement into carbonized silkworm excrement under protective gas; mixing dopamine hydrochloride powder with the carbonized silkworm excrement, adding a ZnCl2 solution, placing into a high-speed mechanical ball mill to perform oscillation activation grafting reaction to obtain dopamine / ZnCl2 / silkworm excrement slurry, and drying the slurry to obtain a crude composite material; performing activation pore-expanding reaction on the crude composite material under protective gas, cleaning, centrifuging, and drying to obtain the dopamine-silkworm excrement composite carbon material high in specific surface area. The preparation method has the advantages that high-speed mechanical oscillation is used to perform grafting compositing on the dopamine hydrochloride and the silkworm excrement and mix the composited dopamine hydrochloride and silkworm excrement with activating agent ZnCl2 to perform primary activation, the grafting composting reaction speed of the two materials are increased greatly, the dispersity of the activating agent on the surface of the silkworm excrement composite material is increased greatly, and the obtained composite carbon material is high in specific surface area, contains N polar groups, and is high in pesticide absorption capacity and good in sustained-release effect.

Description

technical field [0001] The invention belongs to the technical field of composite carbon materials, and in particular relates to a dopamine silkworm excrement 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): B01J20/22B01J20/28B01J20/30A01N51/00A01N25/08A01P7/04
CPCA01N25/08A01N51/00B01J20/20B01J20/22B01J20/28066B01J20/28069
Inventor 赵钟兴王欣辉陶萌良赵祯霞
Owner GUANGXI UNIV
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