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COF/CS aerogel, preparation method and application thereof

An aerogel and hydrogel technology, applied in the field of COF/CS aerogel and its preparation, can solve the problems of difficult separation, low adsorption capacity, poor selectivity, etc., and achieve good application prospects, strong affinity, and porosity. excellent effect

Active Publication Date: 2022-01-28
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a variety of materials have been used as adsorbents for the removal of sulfonamides in water bodies, such as activated carbon, graphene, metal-organic frameworks, covalent organic frameworks, etc., these materials have relatively poor selectivity and low The disadvantages such as high adsorption capacity and difficult separation limit its wide application.

Method used

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  • COF/CS aerogel, preparation method and application thereof
  • COF/CS aerogel, preparation method and application thereof
  • COF/CS aerogel, preparation method and application thereof

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Experimental program
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Effect test

Embodiment l

[0032] Such as figure 1 The schematic diagram of the synthesis of the COF / CS airgel adsorbent of the present invention is shown.

[0033] COF nanoparticles were prepared by mechanical grinding: 0.45 mmol 2,5-diaminobenzenesulfonic acid (Pa-SO 3 H, 84.7mg) and 2.5mmol p-toluenesulfonic acid (PTSA, 430.5mg) are fully ground, after mixing evenly, add 0.35mmol 2,4,6-triformylphloroglucinol (Tp, 74.2mg), continue grinding After 10-15 minutes, add 100 μL of water and continue to grind for 5 minutes, then transfer to a glass vial, heat at 170°C for 3-5 minutes, wash the mixture with hot water, N,N-dimethylacetamide, water, and acetone successively, and heat at 60°C Dry overnight in vacuum to get COF-TpPa-SO 3 H.

[0034] Synthesis of COF / CS airgel by chemical cross-linking method combined with freeze-drying: Weigh 10 mg CS into 800 μL acetic acid water (V 乙酸 :V 水 =3:320) solution, ultrasonic 20 ~ 30min to fully dissolve CS, weigh 10mg TpPa-SO 3 H(TpPa-1,TpPa-NH 2 ,TpPa-CH 3 )...

Embodiment 2

[0036] CS and TpPa-SO 3 The mass ratio of H is 1:4, and COF / CS aerogels with a mass ratio of 25% can be synthesized, and other process parameters are the same as those in Implementation 1.

Embodiment 3

[0038] CS and TpPa-SO 3 When the mass ratio of H is 4:1, the COF / CS aerogels with a mass ratio of 75% can be synthesized, and other process parameters are the same as those in Implementation 1.

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Abstract

The invention discloses COF / CS aerogel, a preparation method and application thereof. According to the COF / CS aerogel disclosed by the invention, the COF / CS aerogel comprises a COF nano particle and a chitosan aerogel network which are cross-linked together through 1, 3, 5-trialdehyde-2, 4, 6-phloroglucinol, and the COF nano particle is a TpPa-SO3H nano particle. The invention relates to application of COF / CS aerogel in treatment of wastewater containing sulfonamides. The prepared COF / CS aerogel is good in water stability and contains sulfonic acid groups with strong affinity with sulfamerazine (SMR), so that various sulfonamides in a water body can be removed, and the COF / CS aerogel has a good application prospect in the field of wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a COF / CS airgel and its preparation method and application. Background technique [0002] Sulfonamides, as one of the most representative types of antibiotics, are one of the most produced and used drugs in recent years. They have the advantages of high efficiency, low toxicity, and broad antibacterial spectrum. However, it will be introduced into the water environment because of its illegal discharge during production and use, and improper use. Sulfonamide drugs, due to their inherent properties, cause their slow degradation rate and fast migration in the natural environment, and are not easy to be metabolized in the living body. They can pass through the food chain and eventually accumulate in the human body, causing human digestive tract dysfunction and poisoning effects And other adverse reactions, further leading to the enhancement of bacterial drug resistance...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/26B01J20/28B01J20/30C02F1/28C02F101/38
CPCB01J13/0091B01J20/267B01J20/28047C02F1/285C02F1/286C02F1/288C02F2101/40
Inventor 黄理金刘坷帅琴
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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