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Preparation method and application of sulfydryl modified graphene oxide nanosheet/geopolymer composite material

A technology of geopolymers and composite materials, which is applied in the field of preparation of mercapto-modified graphene oxide nanosheets/geopolymer composites, can solve the problems of harmless treatment of pollution, re-dissolution, etc., and achieve low leaching rate, good The effect of the adsorption effect

Active Publication Date: 2020-12-25
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For above-mentioned prior art defect, the task of the present invention is to provide a kind of preparation method of mercapto-modified graphene oxide nanosheet / geopolymer composite material, solve the harmless treatment problem of mercury-contaminated soil, avoid the mercury in the treated material redissolution

Method used

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  • Preparation method and application of sulfydryl modified graphene oxide nanosheet/geopolymer composite material
  • Preparation method and application of sulfydryl modified graphene oxide nanosheet/geopolymer composite material

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Embodiment 1

[0029] Take 0.2g of graphene oxide, control the ratio of graphene oxide and KH 590 to 100mg: 1ml, take 2ml of KH590, add appropriate amount of ethanol, then add acetic acid to adjust the pH to 5, react at 78°C for 6 hours, take it out, Centrifuge at 10000r / min for 6 minutes, then wash with ethanol repeatedly 5 times to remove unreacted KH 590. Then add a mixed solution of an appropriate amount of ethanol and water (ethanol: water = 1: 1), then take out 3 parts of 2ml mercapto-modified graphene oxide nanosheet mixed solution and put it in a vacuum drying oven to dry, by the mass of the obtained pure solid, calculate The concentration of the prepared mercapto-modified graphene oxide nanosheets (measured three times and averaged) was 10 mg / ml. Weigh 0.6ml of mercapto-modified graphene oxide nanosheet solution, dissolve it in 10ml of water, and disperse it ultrasonically for 30 minutes. Control the ratio of the mass of mercapto-modified graphene oxide nanosheets to the mass of mer...

Embodiment 2

[0031]Take 0.2g of graphene oxide, control the ratio of graphene oxide and KH 590 to 100mg: 1ml, take 2ml of KH590, add an appropriate amount of ethanol, then add acetic acid to adjust the pH to 5, react at 78°C for 6 hours, take it out, Centrifuge at 10000r / min for 6 minutes, then wash with ethanol repeatedly 5 times to remove unreacted KH 590. Then add a small amount of mixed solution of ethanol and water (ethanol: water = 1: 1), then take out 3 parts of 2ml KH 590 / GO mixed solution and dry it in a vacuum oven, and calculate the prepared mercapto group by the mass of the obtained pure solid The concentration of the modified graphene oxide nanosheets (measured three times and averaged) was 10 mg / ml. Weigh 0.4ml of mercapto-modified graphene oxide nanosheet solution and dissolve it in 2ml of water, ultrasonically disperse for 30 minutes, control the ratio of the mass of mercapto-modified graphene oxide nanosheets to the mass of mercury soil to be 1:1000, that is, add 4g of mer...

Embodiment 3

[0033] Take 0.2g of graphene oxide, control the ratio of graphene oxide and KH 590 to 100mg: 1ml, take 2ml of KH590, add an appropriate amount of ethanol, then add acetic acid to adjust the pH to 5, react at 78°C for 6 hours, take it out, Centrifuge at 10000r / min for 6 minutes, then wash with ethanol repeatedly 5 times to remove unreacted KH 590. Then add a small amount of mixed solution of ethanol and water (ethanol: water = 1: 1), then take out 3 parts of 2ml KH 590 / GO mixed solution and dry it in a vacuum oven, and calculate the prepared mercapto group by the mass of the obtained pure solid The concentration of the modified graphene oxide nanosheets (measured three times and averaged) was 10 mg / ml. Weigh 4ml of mercapto-modified graphene oxide nanosheet solution and dissolve it in 5ml of water, ultrasonically disperse for 30 minutes, control the ratio of the mass of mercapto-modified graphene oxide nanosheets to the mass of mercury soil to be 1:200, that is, add 8g of mercu...

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Abstract

The invention discloses a preparation method of a sulfydryl modified graphene oxide nanosheet / geopolymer composite material. The preparation method comprises the following steps: carrying out pre-adsorption treatment on mercury-polluted soil by using a sulfydryl modified graphene oxide nanosheet ultrasonic dispersion; and then solidifying and stabilizing the mercury-polluted soil subjected to pre-adsorption treatment in a geopolymer to obtain the sulfydryl modified graphene oxide / geopolymer composite material. The sulfydryl modified graphene oxide nanosheet / geopolymer composite material is applied to building materials. The method provided by the invention can effectively solidify and stabilize mercury soil pollutants, has a lower mercury leaching rate and improves the compressive strengthof the material.

Description

technical field [0001] The invention relates to a preparation method and application of a geopolymer composite material, in particular to a preparation method and application of a mercapto-modified graphene oxide nanosheet / geopolymer composite material. Background technique [0002] Among the heavy metal pollution problems in soil in many areas of our country, mercury pollution is the most serious, and its coverage area is the widest. Every year, nearly 30,000 hectares of soil in our country are mercury-polluted. Due to the complex types of mercury-containing soils in my country and the large differences in the forms of mercury, the remediation and restoration of mercury-containing soils in my country should take into account the characteristics of the soil and treat it "appropriately for the site". The solidification / stabilization technology is currently the most effective means of disposing of hazardous waste in the world. This method can quickly and effectively seal mercu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C09K17/40
CPCC04B28/006C09K17/40C04B2111/00775C04B14/024Y02P40/10
Inventor 曹振兴方江宇梁凤芝郭继澳黄涛秦余杨袁凤陈端宋东平金俊勋
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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