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Method for separating trace sulfamethoxazole enriched pollutants based on molecularly imprinted polymer loaded with ionic liquid metal organic framework

A metal-organic framework and sulfamethoxazole technology, applied in water pollutants, chemical instruments and methods, water/sewage treatment, etc., can solve the lack of functional active sites, adsorbents or catalysts can not achieve the desired effect, etc. problems, to achieve the effect of strong selection and recognition ability, broad prospects for industrial application, and fast mass transfer rate

Inactive Publication Date: 2019-11-22
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lack of functional active sites in the framework of most MOFs itself makes them less than ideal as adsorbents or catalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 0.2212g of 2-aminoterephthalic acid and 0.1314g of zirconium tetrachloride and ultrasonically dissolve them in N,N-dimethylformamide for later use, then weigh 0.3226g of 1-allyl-3-vinyl bromide Add imidazole and 0.0625g sulfamethoxazole into a conical flask containing 20mL N,N-dimethylformamide, shake at 180rpm in a water bath at 30°C for 4h, mix with the previous stock solution, and then add 0.7709g crosslinker II Ethylene glycol methacrylate and 10 mg of initiator azobisisobutyronitrile were ultrasonically transferred to a closed polytetrafluoroethylene reactor and autoclave under nitrogen protection, and solvothermally reacted at 120°C for 24 hours, and the product was centrifuged three times with methanol , extracted by Soxhlet elution with a mixture of methanol and acetic acid at a volume ratio of 9:1 for 72 hours, and then vacuum-dried at 80° C. for 24 hours to obtain a molecularly imprinted polymer with ionic liquids immobilized in metal-organic frameworks. ...

Embodiment 2

[0024] Weigh 0.1106g of 2-aminoterephthalic acid and 0.0657g of zirconium tetrachloride and ultrasonically dissolve them in N,N-dimethylformamide for later use, then weigh 0.3226g of 1-allyl-3-vinyl bromide Add imidazole and 0.0625g sulfamethoxazole into a conical flask containing 20mL N,N-dimethylformamide, shake at 180rpm in a water bath at 30°C for 6h, mix with the previous stock solution, and then add 0.7709g crosslinker II Ethylene glycol methacrylate and 10 mg of initiator azobisisobutyronitrile were ultrasonically transferred to a closed polytetrafluoroethylene reactor and autoclave under nitrogen protection, and solvothermally reacted at 180 ° C for 24 hours. The product was subjected to N, N -Dimethylformamide was centrifuged three times, extracted by Soxhlet elution with a mixture of methanol and acetic acid at a volume ratio of 9:1 for 72 hours, and then vacuum-dried at 60°C for 24 hours to obtain molecularly imprinted polymerization of ionic liquids immobilized in m...

Embodiment 3

[0027] Weigh 0.1106g of 2-aminoterephthalic acid and 0.1314g of zirconium tetrachloride and ultrasonically dissolve them in N,N-dimethylformamide for later use, then weigh 0.2113g of 1-allyl-3-vinyl bromide Add imidazole and 0.0625g sulfamethoxazole into a conical flask containing 20mL N,N-dimethylformamide, shake at 180rpm in a water bath at 30°C for 5h, mix with the previous stock solution, and then add 0.7709g crosslinker II Ethylene glycol methacrylate and 10 mg of initiator azobisisobutyronitrile were ultrasonically transferred to a closed polytetrafluoroethylene reactor and autoclave under nitrogen protection, and solvothermally reacted at 120°C for 36 hours, and the product was centrifuged three times with ethanol , extracted by Soxhlet elution with a mixture of methanol and acetic acid at a volume ratio of 9:1 for 48 hours, and then vacuum-dried at 80° C. for 14 hours to obtain a molecularly imprinted polymer with ionic liquids immobilized in metal-organic frameworks. ...

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Abstract

The invention discloses a method for separating trace sulfamethoxazole enriched pollutants based on a molecularly imprinted polymer loaded with an ionic liquid metal organic framework, which comprisesthe following steps: ultrasonically dissolving 2-aminoterephthalic acid and zirconium tetrachloride in N, N-dimethylformamide for later use; adding ionic liquid brominated 1-allyl-3-vinyl imidazole and a template molecule sulfamethoxazole into an organic reagent to carry out a pre-polymerization reaction; and mixing the obtained solvents, adding a cross-linking agent ethylene glycol dimethacrylate and an initiator azodiisobutyronitrile, carrying out ultrasonic treatment, carrying out a hot solvent reaction under the protection of nitrogen, centrifuging the product, eluting, and drying to obtain the molecularly imprinted polymer. The molecularly imprinted polymer prepared in the invention has an ultra-large specific surface area and good physical stability and chemical stability, has strong selective recognition ability on sulfamethoxazole in the environment as a solid phase extraction adsorbent, has a fast mass transfer rate and a large adsorption capacity, and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of separating and enriching organic pollutants by molecularly imprinted polymers, and in particular relates to a method for separating and enriching trace sulfamethoxazole pollutants based on molecularly imprinted polymers loaded with ionic liquid metal-organic frameworks. Background technique [0002] Metal-organic frameworks (MOFs) are a new type of porous material with the characteristics of large specific surface area, controllable pore size, easy modification of the skeleton and rich content of functional groups. It has great potential application value. However, the lack of functional active sites in the framework of most MOFs themselves makes them less than ideal as adsorbents or catalysts. Luo Qunxing’s research group (Luo. Journal of Materials Chemistry A, 2013, 1, 6530-6534.) used porous MIL-101 with a metal center coordination unsaturation point as a carrier, and realized the Catalytic reaction ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/34C02F101/38
CPCB01J20/268C02F1/288C02F2101/40C02F2101/38C02F2101/34
Inventor 朱桂芬程国浩杨灿王小月李世颖张耀宗樊静
Owner HENAN NORMAL UNIV
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