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Metal-organic framework imprinted material and preparation method thereof

A technology of imprinting material and metal frame, which is applied in the field of metal frame imprinting material and its preparation, can solve the problem that the detection trend of organophosphorus pesticide residues cannot be satisfied, and achieves simplified pretreatment process, high environmental friendliness, good dispersibility and stability sexual effect

Active Publication Date: 2017-05-10
内蒙古普析通用仪器有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research work, most polymers often only recognize a single organophosphorus compound, which cannot meet the trend of residual detection of organophosphorus pesticides in the direction of recombination

Method used

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  • Metal-organic framework imprinted material and preparation method thereof
  • Metal-organic framework imprinted material and preparation method thereof
  • Metal-organic framework imprinted material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A method for preparing a metal frame imprinted material provided by an embodiment of the present invention includes the following steps:

[0021] Preparation of magnetic metal organic framework compounds;

[0022] Magnetic Fe 3 o 4 Ultrasonic dispersion of nanoparticles into FeCl-containing 3 Add the DMF solution containing terephthalic acid to the DMF solution of terephthalic acid. After the ultrasonic dispersion is uniform, the mixed solution is placed in the inner liner of the reaction kettle and reacted at 110-150°C for 16-24 hours. After the reaction is completed, the reaction product is washed with absolute ethanol to remove ethanol-soluble matter in the reaction product, and dried at 55-65° C. for 10-14 hours to obtain a magnetic metal organic framework compound. Because FeCl 3 It is easy to absorb water and has strong water absorption. It can absorb moisture in the air and deliquescence, so FeCl 3 Optional FeCl 3 ·6H 2 O. Preferably, the magnetic Fe 3 o...

Embodiment 1

[0035] Please refer to figure 1 , this embodiment provides a metal frame imprinted material, which is prepared by the following steps:

[0036] 4mmolFeCl 3 , 2mmolFeCl 2 and 100 mL of deionized water were placed in a 250 mL three-necked flask, mechanically stirred for 20 min under nitrogen protection at 70°C, and then 5 mL of ammonia water was added. Cool to 20°C after the reaction, and collect magnetic Fe with an external magnetic field 3 o 4 nanoparticles and washed with ultrapure water and ethanol.

[0037] 50mg magnetic Fe 3 o 4 Nanoparticles were ultrasonically dispersed to contain 2.5 g of FeCl 3 ·6H 2 To the DMF solution of O, add the DMF solution containing 0.75g of terephthalic acid. The DMF solution is 50mL. After the reaction is finished, wash with absolute ethanol and dry at 55°C for 10 hours to obtain a magnetic metal organic framework compound.

[0038] Ultrasonic dispersion of 100 mg of magnetic metal-organic framework compound in 10 mL of acetonitrile...

Embodiment 2

[0040] Please refer to figure 1 , this embodiment provides a metal frame imprinted material, which is prepared by the following steps:

[0041] 6mmolFeCl 3 ·6H 2 O, 2.5 mmol FeCl 2 4H 2 O and 100 mL of deionized water were placed in a 250 mL three-necked flask, mechanically stirred for 30 min under nitrogen protection at 80°C, and then 5 mL of ammonia water was added. Cool to 25°C after the reaction, and collect magnetic Fe with an external magnetic field 3 o 4 nanoparticles and washed with ultrapure water and ethanol.

[0042] 75mg magnetic Fe 3 o 4 Nanoparticles were ultrasonically dispersed to contain 3.5 g of FeCl 3 ·6H 2 To the DMF solution of O, add the DMF solution containing 1.2g of terephthalic acid, the DMF solution is 100mL, after the ultrasonic dispersion is uniform, the mixed solution is placed in the inner liner of the reaction kettle, and reacted at 130°C for 20h. After the reaction is finished, wash with absolute ethanol and dry at 60° C. for 12 hour...

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Abstract

The invention provides a metal-organic framework imprinted material and a preparation method thereof, belonging to the technical field of nanometer materials. The preparation method for the metal-organic framework imprinted material comprises the following steps: dispersing a magnetic metal-organic framework compound prepared through an in-situ reaction of terephthalic acid with magnetic Fe3O4 nanoparticles in a solvent; adding template molecules and functional monomers; and carrying out a cross-linking reaction and then removing the template molecules; wherein the template molecules comprise one or more selected from a group consisting of diazinon and parathion, and the functional monomers comprise one or more selected from a group consisting of 3-aminopropyltriethoxysilane and phenyltrimethoxysilane. The preparation method is simple in process, low in cost, highly environment-friendly, and easy to realize large-scale production. The metal-organic framework imprinted material is prepared by using the preparation method. The prepared metal-organic framework imprinted material has better stability and adsorptivity, good recognition performance, high selectivity and large adsorption capacity, and can realize simultaneous and selective removal and enrichment of a plurality of organophosphorus pesticides in environment and food.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, and in particular to a metal frame imprinted material and a preparation method thereof. Background technique [0002] Organophosphorus pesticides have become one of the most widely used pesticides in my country due to their high insecticidal efficiency, low price, and easy degradation. However, the unreasonable and non-standard use of organophosphorus pesticides leads to the residue of organophosphorus in the environment, and the residue of organophosphorus in some agricultural products exceeds the standard, which poses a threat to the environment and human health. Therefore, it is of great significance to develop a fast, accurate and sensitive detection method for organophosphorus pesticide residues to ensure food safety and human health. [0003] At present, researchers have developed high performance liquid chromatography (HPLC) method, gas chromatography (GC) method, thin layer c...

Claims

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Application Information

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IPC IPC(8): C08G77/26C08G77/06C08K5/00C08J9/28B01J20/26B01J20/30C02F1/28C02F101/30
CPCB01J20/268C02F1/285C02F2101/30C08G77/06C08G77/26C08J9/28C08J2383/04C08J2383/08C08K5/0008
Inventor 王珊珊王静戚燕佘永新金芬金茂俊邵华刘广洋曹晓林
Owner 内蒙古普析通用仪器有限责任公司
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