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Preparation and application of water system ZIF-8, EY/ZIF-8/PAA composite aerogel

A technology of ZIF-8 and composite airgel, which is applied in water/sludge/sewage treatment, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problem of low density, rough surface of composite airgel and difficulty in recycling and other problems, achieve low density, good thermal stability and water stability, and solve the effect of recycling difficulties

Inactive Publication Date: 2021-04-02
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the disadvantage of difficult recovery of ZIF-8, the present invention uses egg yolk (EY) as the biomass substrate, ZIF-8 as the raw material, and prepares EY / ZIF-8 / PAA composite airgel by in-situ polymerization in a water bath , the composite airgel has a rough surface, irregular porous structure inside, low density, good thermal stability and water stability, which solves the shortcomings of difficult recovery of ZIF-8, and is resistant to heavy metal ions (Pb 2+ , Cd 2+ ) have good adsorption properties

Method used

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  • Preparation and application of water system ZIF-8, EY/ZIF-8/PAA composite aerogel
  • Preparation and application of water system ZIF-8, EY/ZIF-8/PAA composite aerogel
  • Preparation and application of water system ZIF-8, EY/ZIF-8/PAA composite aerogel

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Embodiment 1

[0026] The preparation method is as follows:

[0027] (1) Preparation of ZIF-8: 1.17 g of zinc nitrate was added to 8.0 g of deionized water, and ultrasonically dissolved. Next, add 22.74g 2-methylimidazole to 80g deionized water, ultrasonically dissolve, and finally, under the condition of magnetic stirring at room temperature, slowly add the zinc nitrate solution to the 2-methylimidazole solution, and continue Stir for five minutes, centrifuge at 8000 r / min to obtain a precipitate, wash the precipitate with deionized water and centrifuge several times, then vacuum dry at 65° C. for 12 hours to obtain ZIF-8.

[0028] (2) Preparation of the gel: Take about 5.0 g of egg yolk (EY) from fresh eggs and put it in a beaker, add 5.0 mL of deionized water, stir magnetically until evenly dispersed, then add about 2.5 g of ZIF-8, continue Stir until evenly dispersed, then add 0.5 g of acrylic acid, 0.2 g of 1,4-butanediol, and 0.01 g of potassium persulfate, stir for 10 min, remove fro...

Embodiment 2

[0031] The preparation method is as follows:

[0032] (1) Preparation of ZIF-8: 11.7 g of zinc nitrate was added to 80.0 g of deionized water, and ultrasonically dissolved. Next, add 227.94g of 2-methylimidazole to 800g of deionized water, ultrasonically dissolve, and finally, under the condition of magnetic stirring at room temperature, slowly add the zinc nitrate solution to the 2-methylimidazole solution, and continue to Stir for ten minutes, let stand for 1 hour, discard the supernatant, centrifuge the bottom solution at 10,000r / min to obtain the precipitate, wash the precipitate with deionized water and centrifuge several times, dry it in vacuum at 65°C for more than 12 hours, grind it Get ZIF-8.

[0033] (2) Preparation of the gel: Take about 8.0 g of egg yolk (EY) from fresh eggs and put it in a beaker, add 8.0 mL of deionized water, stir magnetically until evenly dispersed, then add about 4.0 g of ZIF-8, continue Stir until evenly dispersed, then add 1.0 g of acrylic...

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PUM

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Abstract

The invention provides preparation and application of water system ZIF-8, EY / ZIF-8 / PAA composite aerogel. A preparation method of ZIF-8 is optimized and improved, the water system ZIF-8 is prepared byadopting a water system method, egg yolk (EY) is adopted as a biomass base material, the ZIF-8 is adopted as a raw material, and the EY / ZIF-8 / PAA composite aerogel is prepared by adopting an in-situpolymerization method. The composite aerogel has a rough surface, irregular porous structures inside the aerogel, has low density, good thermal stability and water stability, solves the difficult recovery problem in the ZIF-8 application, and provides good heavy metal ion (Pb<2+>, Cd<2+>) adsorption performance.

Description

technical field [0001] The invention relates to the field of heavy metal adsorption, in particular to the preparation and application of a water system ZIF-8, EY / ZIF-8 / PAA composite airgel. Background technique [0002] The rapid development of industry has produced a large amount of wastewater, because wastewater has brought many negative effects on the environment and human health, so the treatment of wastewater has always been a hot topic. Heavy metal ions in wastewater will cause damage to the kidneys, nervous system, and cardiovascular and cerebrovascular systems of the human body after being ingested by the human body. In order to protect the environment and human health, there is an urgent need for a method to remove heavy metals from wastewater to meet the increasing environmental quality requirements. Common methods for treating pollutants in wastewater include chemical precipitation, extraction, membrane separation, ion exchange, electrochemical methods, adsorptio...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCC08G83/008B01J20/226B01J20/24B01J20/28047B01J20/3085C02F1/288B01J2220/4856C02F2101/20
Inventor 陈志军王青青杨清香王芳草赵俊红谢云鹏王聪雷李玲
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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