Preparation method of magnetic molecular imprinted nanometer material

A magnetic molecular imprinting and nanomaterial technology, applied in the field of environmental pollutant removal and detection, can solve the problems of difficult to master polymerization conditions, difficult material morphology, low removal efficiency, etc., to save processing time and cost, easy to control, and to improve selective effect

Inactive Publication Date: 2016-08-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with direct polymerization, the second preparation method is more efficient and more widely used, but there are still problems such as difficult to grasp the polymerization conditions, difficult to control the shape of the material, and poor repeatability.
In addition, after the adsorption of molecularly imprinted nanomaterials is completed, the nanomaterials need to be separated by high-speed centrifugation or filtration, which is cumbersome to operate and has low removal efficiency.

Method used

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  • Preparation method of magnetic molecular imprinted nanometer material
  • Preparation method of magnetic molecular imprinted nanometer material
  • Preparation method of magnetic molecular imprinted nanometer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 20mg graphene / Fe 3 o 4 In the Erlenmeyer flask, add 40mL water, ultrasonic 30min, make graphene / Fe 3 o 4 Disperse evenly, add 0.003g saffloxacin, 5mL dopamine solution with a concentration of 5mg / L, 5mL tris(hydroxymethyl)aminomethane hydrochloride with a concentration of 200mmol / L, adjust the pH of the solution to 8.5, at 25°C, Shake and react in a shaker at 110 rpm for 2 hours. After the reaction, discard the supernatant under the condition of an external magnetic field, collect the magnetic material, wash it repeatedly with ultrapure water, and dry it in vacuum to obtain the magnetic molecularly imprinted nanomaterial.

Embodiment 2

[0028] Take 20mg graphene / Fe 3 o 4 In the Erlenmeyer flask, add 40mL water, ultrasonic 30min, make graphene / Fe 3 o 4 Disperse evenly, add 0.003g of saffloxacin, 5mL of dopamine solution with a concentration of 5mg / L, and 5mL of tris(hydroxymethyl)aminomethane hydrochloride with a concentration of 100mmol / L, adjust the pH of the solution to 8.5, at 25°C, Shake and react in a shaker at 110 rpm for 10 hours. After the reaction, discard the supernatant under the condition of an external magnetic field, collect the magnetic material, wash it repeatedly with ultrapure water, and dry it in vacuum to obtain the magnetic molecularly imprinted nanomaterial.

Embodiment 3

[0030] Take 40mg graphene / Fe 3 o 4 In the Erlenmeyer flask, add 40mL water, ultrasonic 30min, make graphene / Fe 3 o 4 Disperse evenly, add 0.003g saffloxacin, 5mL dopamine solution with a concentration of 5mg / L, 5mL tris(hydroxymethyl)aminomethane hydrochloride with a concentration of 200mmol / L, adjust the pH of the solution to 8.5, at 25°C, Shake and react in a shaker at 110 rpm for 2 hours. After the reaction, discard the supernatant under the condition of an external magnetic field, collect the magnetic material, wash it repeatedly with ultrapure water, and dry it in vacuum to obtain the magnetic molecularly imprinted nanomaterial.

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Abstract

The invention discloses a preparation method of a magnetic graphene molecular imprinted nanometer material and belongs to the fields of environmental pollutant removal and detection. The magnetic molecular imprinted nanometer material is of a core-shell structure formed by wrapping grapheme / Fe3O4 with dopamine molecularly imprinted polymer. The preparation method comprises the steps of mixing graphene oxide and FeCl3, then conducting a hydrothermal reaction to prepare grapheme / Fe3O4, adopting sarafloxacin as template molecules, adopting dopamine as a monomer, adopting Tris-HCl solvent with pH being 8.5 as solvent, after the materials are mixed, conducting polymerization under an oscillation condition, collecting products of a polymerization reaction with magnets, and after the template molecules are eluted, conducting drying, so that the magnetic molecular imprinted nanometer material is obtained. The magnetic graphene molecular imprinted nanometer material has a high adsorption rate, a high adsorption capacity and a high specificity for fluoroquinolone antibiotics, and has great application value in the field of adsorbing and removing the fluoroquinolone antibiotics in a water body.

Description

technical field [0001] The invention discloses a preparation method of a magnetic graphene molecularly imprinted nanomaterial, which belongs to the field of environmental pollutant removal and detection. Background technique [0002] Antibiotics in water have become a new type of environmental pollutants and have attracted more and more attention. Due to the low concentration of antibiotics in general water bodies (μg / L or ng / L level), it is difficult to remove them by sewage treatment plants using conventional treatment processes. Adsorption is a technology to remove low-concentration pollutants, but it still faces great challenges in the selective removal of low-concentration pollutants under the condition of a large number of common coexisting organic / inorganic substances. [0003] Molecular imprinting technology can design and synthesize polymers with specific recognition ability for the target according to the structural characteristics of the target, which can be used...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/28C08G73/02C02F1/28C02F1/58
CPCB01J20/06B01J20/20B01J20/262B01J20/28009B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F1/288C02F2101/36C08G73/02
Inventor 谭峰刘敏任苏瑜
Owner DALIAN UNIV OF TECH
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