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Preparation method of molecularly imprinted material and molecularly imprinted material prepared by same

A molecularly imprinted and nanoparticle technology, applied in the preparation of molecularly imprinted materials and the field of molecularly imprinted materials, can solve the problems of inability to achieve simultaneous enrichment and detection, and achieve the effects of good chemical stability, good stability and easy separation

Active Publication Date: 2015-11-25
INST OF QUALITY STANDARD & TESTING TECH FOR AGRO PROD OF CAAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking environmental endocrine disruptors as an example, the molecular imprinting recognition materials are mostly concentrated in traditional bulk materials, or hybrid materials prepared with silica, titanium oxide, ferric oxide, graphene, etc. Fe 3 o 4 -g -C 3 N 4 Molecularly imprinted materials, and these research works can only enrich 2-3 EDCs compounds with similar structures at the same time. When steroids and phenolic EDCs with different structures coexist, it is often impossible to achieve rapid and effective simultaneous enrichment and detection.

Method used

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  • Preparation method of molecularly imprinted material and molecularly imprinted material prepared by same
  • Preparation method of molecularly imprinted material and molecularly imprinted material prepared by same
  • Preparation method of molecularly imprinted material and molecularly imprinted material prepared by same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment includes the following steps

[0052] S11: g-C prepared by thermal polymerization of melamine 3 N 4 Nanoparticles

[0053] Weigh 10g of melamine and place it in a 100mL semi-closed crucible, then place the crucible in a muffle furnace and heat it to 550°C at a heating rate of 3°C / min and then keep it warm for 5h. After cooling to room temperature naturally, take it out, grind it into powder with a mortar and store it for later use.

[0054] S12: Magnetic graphite-like carbon nitride nanoparticles (g-C 3 N 4 -Fe 3 o 4 ) preparation

[0055] Weigh 125mgg-C 3 N 4 Into 500mL ethanol / water mixed solution (volume ratio 1:2), ultrasonically disperse for 5h to obtain uniformly dispersed g-C 3 N 4 suspension. 1.838gFeCl 3 ·6H 2 O (M=270) and 0.703g FeCl 2 4H 2 O (M=198) added to the above g-C 3 N 4 In the suspension, 10 mL of 28% (V / W) ammonia water was added to react for 30 min after stirring at 80° C. for 30 min. Cool to room temperature afte...

Embodiment 2

[0064] This embodiment includes the following steps

[0065] S21: g-C prepared by thermal polymerization of melamine 3 N 4 Nanoparticles

[0066] Weigh 5g of melamine into a 100mL semi-closed crucible, and then place the crucible in a muffle furnace. Heat the muffle furnace to 500°C at a heating rate of 3°C / min and keep it warm for 3h. After cooling to room temperature naturally, take it out, grind it into powder with a mortar and store it for later use.

[0067] S22: Magnetic graphite-like carbon nitride nanoparticles (g-C 3 N 4 -Fe 3 o 4 ) preparation

[0068] Weigh 100mgg-C 3 N 4 Ultrasonic dispersion with 500mL ethanol / water mixed solution (volume ratio 1:2) for 5h to obtain uniformly dispersed g-C 3 N 4 suspension. 1.62gFeCl 3 ·6H 2 O (M=270) and 0.79g FeCl 2 4H 2 O (M=198) added to the above g-C 3 N 4 In the suspension, 10 mL of 25% (V / W) ammonia water was added to react for 30 min after stirring at 80° C. for 30 min. Cool to room temperature after th...

Embodiment 3

[0077] This implementation includes the following steps

[0078] S31: g-C prepared by thermal polymerization of melamine 3 N 4 Nanoparticles

[0079] Weigh 8g of melamine and place it in a 100mL semi-closed crucible, then place the crucible in a muffle furnace. The muffle furnace was heated to 550°C at a heating rate of 3°C / min and then kept for 4h. After cooling to room temperature naturally, take it out, grind it into powder with a mortar and store it for later use.

[0080] S32: Magnetic graphite-like carbon nitride nanoparticles (g-C 3 N 4 -Fe 3 o 4 ) preparation

[0081] Weigh 150mgg-C 3 N 4 Ultrasonic dispersion with 500mL ethanol / water mixed solution (volume ratio 1:2) for 5h to obtain uniformly dispersed g-C 3 N 4 suspension. 2.430gFeCl 3 ·6H 2 O (M=270) and 0.99g FeCl 2 4H 2 O (M=198) added to the above g-C 3 N 4 In the suspension, after stirring at 80°C for 30 minutes, 10 mL of 28% (V / W) ammonia water was added to react for 60 minutes. Cool to roo...

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Abstract

The invention provides a preparation method of a molecularly imprinted material and a molecularly imprinted material prepared by the same. The preparation method comprises the following steps: depositing Fe3O4 on a graphite-like-phase carbon nitride surface by a coprecipitation process to obtain a Fe3O4-g-C3N4 nano material, thereby obtaining a propenyl-surface-modified magnetic silicon dioxide graphite-like-phase carbon nitride nano material; and by using the propenyl-surface-modified magnetic silicon dioxide graphite-like-phase carbon nitride nano material as a carrier, optimizing a functional monomer, and carrying out a surface imprinting technique to obtain the molecularly imprinted material capable of quickly indentifying seven environmental endocrine disrupting chemicals at the same time. The molecularly imprinted material has the advantages of high adsorption capacity, favorable selectivity, high response speed, high chemical stability and high utilization ratio, is convenient for operation, can simultaneously implement identification and separate enrichment of multiple trace steroid / phenol environmental endocrine disrupting chemicals, and widens the application range of the existing magnetic nano material, graphite-like-phase carbon nitride material and molecularly imprinted material.

Description

technical field [0001] The present invention relates to the fields of environmental chemistry, analytical chemistry, food chemistry, etc., and specifically relates to a method for preparing a molecularly imprinted material and the molecularly imprinted material prepared therefrom. Background technique [0002] Environmental Endocrine Disruptors (Environmental Endocrine Disruptors, EDCs) are a class of biological or human by interfering with the synthesis, secretion, transport, binding, reaction and metabolic process of natural hormones produced in the organism to maintain its own balance and regulate the development process. A class of exogenous chemicals that affect the reproductive, nervous, and immune systems. Relevant studies have shown that even if the content is at the ppt-ppb level, most EDCs will have adverse effects on the development and reproductive functions of animals and humans, and even cause tumors (such as breast cancer, ovarian cancer, etc.). [0003] Howe...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/06C08F212/14C08F220/56C08F226/06C08F220/04C08J9/26B01J20/26B01J20/28B01J20/30
Inventor 王珊珊刘广洋王静金芬邵华金茂俊佘永新郑鹭飞
Owner INST OF QUALITY STANDARD & TESTING TECH FOR AGRO PROD OF CAAS
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