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Preparation method and application of mosaic type magnetic imprinting adsorbent

A technology of imprinted adsorption and mosaic, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of site loss, difficult separation and collection, selectivity to be improved, etc., to achieve improved Effects of selective, easy-to-separate collection

Active Publication Date: 2020-06-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional nanosheet adsorbents still have deficiencies, such as the selectivity of adsorption separation needs to be improved, the problems of site loss and difficult separation and collection caused by the agglomeration and stacking of sheet materials limit the application in the separation of target substances in complex systems.

Method used

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  • Preparation method and application of mosaic type magnetic imprinting adsorbent
  • Preparation method and application of mosaic type magnetic imprinting adsorbent
  • Preparation method and application of mosaic type magnetic imprinting adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Fe 3 o 4 -NH 2 preparation of

[0046] 1.0g FeCl 3 ·6H 2 O, 6.5g of 1,6-hexanediamine, 2.0g of anhydrous sodium acetate and 30mL of ethylene glycol were stirred and became transparent at 50°C. The mixture was transferred to an autoclave and heated to 200 °C for 6 hours. After the reaction, wash the black amino-modified Fe with water and ethanol 3 o 4 Nanoparticles (Fe 3 o 4 -NH 2 ) and separated by a magnet, and dried under vacuum at 50°C. The product was redispersed in toluene at a concentration of 10 mg / mL.

[0047] (2) Preparation of J-SNs nanosheets;

[0048] by Hummer ’ s method to prepare GO nanosheets. 50mg GO nanosheets were used as stable particles, 50mL water and 5g solid paraffin were used as continuous phase and dispersed phase respectively, 3.75mL saturated sodium chloride (NaCl) solution was added as electrolyte, and stirred at a high speed of 14000rpm for 5min to generate GO stable Pickering Emulsion (GO-Pickering). It was then collect...

Embodiment 2

[0059] (1) Fe 3 o 4 -NH 2 preparation of

[0060] 1.0g FeCl 3 ·6H 2 O, 6g of 1,6-hexanediamine, 1.5g of anhydrous sodium acetate and 20mL of ethylene glycol were stirred at 50°C and became transparent; the mixture was transferred to an autoclave and heated to 200°C for 6h. After the reaction, wash the black amino-modified Fe with water and ethanol 3 o 4 Nanoparticles (Fe 3 o 4 -NH 2 ) and separated by a magnet, and dried under vacuum at 50°C. The product was redispersed in toluene at a concentration of 10 mg / mL.

[0061] (2) Preparation of J-SNs nanosheets;

[0062] by Hummer ’ GO nanosheets were prepared by s method; 50mg GO nanosheets were used as stable particles, 40mL water and 4g solid paraffin were used as continuous phase and dispersed phase respectively, and 3.5mL saturated sodium chloride (NaCl) solution was added as electrolyte, and stirred at a high speed at 14000rpm After 5 minutes, a GO-stabilized Pickering emulsion (GO-Pickering) was generated. It w...

Embodiment 3

[0068] (1) Fe 3 o 4 -NH 2 preparation of

[0069] 1.0g FeCl 3 ·6H 2 O, 7g of 1,6-hexanediamine, 2.5g of anhydrous sodium acetate and 40mL of ethylene glycol were stirred at 50°C and became transparent. The mixture was transferred to an autoclave and heated to 200 °C for 6 h. After the reaction, wash the black amino-modified Fe with water and ethanol 3 o 4 Nanoparticles (Fe 3 o 4 -NH 2 ) and separated by a magnet, and dried under vacuum at 50°C. The product was redispersed in toluene at a concentration of 10 mg / mL.

[0070] (2) Preparation of J-SNs nanosheets;

[0071] by Hummer ’ s method to prepare GO nanosheets. 50mg GO nanosheets were used as stable particles, 60mL water and 6g solid paraffin were used as continuous phase and dispersed phase respectively, 4mL saturated sodium chloride (NaCl) solution was added as electrolyte, and stirred at a high speed of 14000rpm for 5min to generate GO stable Pickering emulsion (GO-Pickering). It was then collected by cen...

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Abstract

The invention relates to a preparation method of a mosaic type magnetic imprinting adsorbent, and belongs to the technical field of specific separation functional material preparation. The preparationmethod comprises the following steps: firstly, preparing amino-modified Fe3O4 particles and Janus nano sheets, then preparing a Janus molecularly imprinted polymer by virtue of an ATRP molecular imprinting technology; combining the anisotropism of Alg-Ca<2+> with the anisotropism of a Pickering emulsion and the anisotropism of a Janus-MIPs nano sheet, and meanwhile, filling Fe3O4-NH2 to prepare amosaic Alg-Ca<2+> core magnetic molecularly imprinted adsorbent. The prepared mosaic type magnetic imprinting adsorbent has high adsorption capacity, and can effectively solve the problem that molecularly imprinted nano sheets are easy to stack; meanwhile, the Pickering emulsion is filled with paramagnetic particles, so that the Pickering emulsion has magnetic response and is easy to separate andrecover; and the adsorbent has an obvious dA molecule recognition performance, and is used for selective recognition and separation of dA in a water solution.

Description

technical field [0001] The invention belongs to the technical field of preparation of specific selective separation functional materials, and in particular relates to a preparation method of a mosaic-type magnetic imprinting adsorbent. Background technique [0002] Nanosheet adsorbent has good physical and chemical properties, and has attracted extensive attention in the field of adsorption and separation because of its high specific surface area and easy modification. The two sides of the nanosheets can be covalently modified or grafted with different types of functional groups or polymer chains to obtain functionalized nanosheets. However, traditional nanosheet adsorbents still have shortcomings, such as the selectivity of adsorption separation needs to be improved, the site loss caused by the agglomeration and stacking of sheet materials, and the problems of difficult separation and collection limit the application in the separation of targets in complex systems. Therefo...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/268B01J20/28009
Inventor 王盼潘建明
Owner JIANGSU UNIV
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