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Carbon aerogel material, preparation method thereof, and application of carbon aerogel material as heavy metal contaminated soil remediation material

A carbon aerogel and metal technology, applied in the field of ecological environment management, can solve the problems of lack of high-performance environmental functional materials, heavy metal pollution, etc., and achieve the effect of low density, less addition, and mild reaction conditions

Active Publication Date: 2020-11-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the serious pollution of soil heavy metals and the lack of high-performance environmental functional materials in the prior art, the first purpose of the present invention is to provide a kind of material with a developed pore structure, a large specific surface area, and contains polar groups and has a similar molecular imprint. A carbon airgel material with a specific structure, which can achieve selective adsorption of heavy metals and has good water and fertilizer retention properties, especially suitable for heavy metal contaminated soil remediation materials

Method used

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  • Carbon aerogel material, preparation method thereof, and application of carbon aerogel material as heavy metal contaminated soil remediation material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] In a 250mL beaker, add 25g of novolac resin, 5g of diethylenetriamine, 0.6g of solid anhydrous aluminum trichloride and 100ml of ethanol, stir vigorously, pour into a hydrothermal reaction kettle, and start heating. When the reaction reaches the set temperature, start timing. The reaction was carried out at a reaction temperature of 80° C. for 4 days. After the reaction, a yellow solid appeared, and the yellow solid was taken out and dried in vacuum for 24 hours. Under a nitrogen atmosphere, heat in a tube furnace at 800°C for 4 hours, take out the black solid after cooling, grind it and pass it through a 60-mesh sieve, wash the finely sieved solid with dilute hydrochloric acid to remove metal salts, and then wash it with pure water to the washing liquid When the pH is constant, the carbon airgel material with aluminum trichloride imprint is obtained. The carbonization yield of the carbon airgel is: 53.5%, and the specific surface area is 660m 2 / g, average pore diam...

Embodiment 2

[0035] In a 250mL beaker, add 25g of novolac resin, 5g of hexamethylenetetramine, 0.61g of solid zinc chloride and 100ml of ethanol, stir vigorously, pour into the hydrothermal reaction kettle, and start heating. When the reaction reaches the set temperature, start timing. The reaction was carried out at a reaction temperature of 80° C. for 6 days. After the reaction, a yellow solid appeared, and the yellow solid was taken out and freeze-dried. Under nitrogen atmosphere, heat in a tube furnace at 600°C for 6 hours, take out the black solid after cooling, pass through a 60-mesh sieve after grinding, wash the sieved solid with dilute hydrochloric acid and dilute nitric acid to remove metal salts, and then wash with pure water Until the pH of the washing solution is constant, a carbon airgel material with zinc chloride imprints is obtained. The carbonization yield of the carbon airgel is: 55.24%, and the specific surface area is 968m 2 / g, average pore diameter: 786nm, pore vo...

Embodiment 3

[0036] Embodiment 3 (the comparative example that does not add metal chloride salt)

[0037] In a 250mL beaker, add 25g of novolac resin, 5g of hexamethylenetetramine and 100ml of ethanol, stir vigorously, pour into the hydrothermal reaction kettle, and start heating. When the reaction reaches the set temperature, start timing. The reaction was carried out at a reaction temperature of 80° C. for 6 days. After the reaction, a yellow solid appeared, and the yellow solid was taken out and freeze-dried. Under a nitrogen atmosphere, heat in a tube furnace at 600°C for 6 hours, and take out the black solid after cooling to obtain the carbon airgel material. The carbonization yield of the carbon airgel is: 51.57%, and the specific surface area is 413m 2 / g, average pore diameter: 452nm, pore volume: 2.11cm 3 / g. This example shows that when no metal chloride salt is used as a template, the obtained carbon aerogel has a low specific surface area and an undeveloped pore structure....

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Abstract

The invention discloses a carbon aerogel material, a preparation method thereof, and an application of the carbon aerogel material as a heavy metal contaminated soil remediation material. The preparation method of the carbon aerogel material comprises the following steps: by taking linear phenolic resin as a raw material and metal chlorate as a template, forming gel by crosslinking the linear phenolic resin and forming an imprint by utilizing the metal chlorate; therefore, the carbon aerogel material which is developed in pore structure and large in specific surface area, contains polar groupsand has a similar molecular imprinting specific structure is obtained; the carbon aerogel material can achieve selective adsorption of heavy metal, has good water and fertilizer retention performance, can improve the volume weight of soil, and is particularly suitable for remediation of heavy metal contaminated soil.

Description

technical field [0001] The present invention relates to a carbon airgel material, in particular to a method for synthesizing a carbon airgel material with a specific structure similar to molecular imprinting through molecular imprinting and a template method, and also relates to the remediation of heavy metal-contaminated soil by the carbon airgel material The application in it belongs to the field of ecological environment governance. Background technique [0002] Carbon airgel is a special carbon foam material. Its unique three-dimensional network structure makes it have excellent properties such as low density, large specific surface area, controllable pore structure and good electrical conductivity. Since the first preparation of resorcinol-formaldehyde (RF) carbon aerogels in Lawrence Livermore National Laboratory in the United States in 1989, carbon aerogels have always attracted the attention of researchers. Carbon airgel is a new type of nano-porous carbon material,...

Claims

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Application Information

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IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 侯浩波李嘉豪周旻李徐立陈方远张雪梅
Owner WUHAN UNIV
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