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An aqueous metal-organic framework molecularly imprinted material enriched with trace amounts of metolcarb

A metal-organic framework and molecular imprinting technology, applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as particle size, irregular shape, slow mass transfer rate, and damage to binding sites, achieving low production costs, The effect of uniform particle distribution and increasing the specific surface area

Active Publication Date: 2016-08-17
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acquisition of molecularly imprinted materials synthesized by traditional bulk polymerization methods requires grinding and other steps. The size and shape of the ground particles are not regular enough, the mass transfer rate is slow, and the binding sites may be destroyed.

Method used

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  • An aqueous metal-organic framework molecularly imprinted material enriched with trace amounts of metolcarb
  • An aqueous metal-organic framework molecularly imprinted material enriched with trace amounts of metolcarb
  • An aqueous metal-organic framework molecularly imprinted material enriched with trace amounts of metolcarb

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Experimental program
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Embodiment 1

[0031] A method for preparing a water-phase metal-organic framework molecularly imprinted material (MIL@MIP) enriched with trace amounts of medicarb, comprising the following steps:

[0032] 1). Preparation of MIL-101: 4.00g chromium nitrate (Cr(NO 3 ) 3 9H 2 O), 1.64g terephthalic acid (H 2BDC) and 125 μL of 40% hydrofluoric acid (HF) were added to 70 mL of ultrapure water, and ultrasonically mixed thoroughly. Transfer to a 100mL autoclave, heat at 220°C for 8h, cool to room temperature, transfer the reaction solution to a 100mL centrifuge tube, centrifuge, pour off the supernatant, wash the filter residue with ultrapure water, wash three times repeatedly, and ultrasonicate each time 10min, then centrifuged at a speed of 4000r / min for 15min with a high-speed centrifuge, and dried to obtain the green powder product MIL-101. Transfer the synthesized MIL-101 sample to a 100mL round bottom flask, add 50mL ultrapure water, stir well, heat in a water bath at 70°C for 5h, and ce...

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Abstract

The invention relates to a water-phase metal-organic framework molecularly imprinted material enriched with trace amounts of tamocarb. The product is prepared by a method comprising the following steps: using water-phase synthesized metal-organic framework material MIL‑101 as a support , Methiocarb as a template molecule, 3‑aminopropyltriethoxysilane as a functional monomer, tetraethoxysilane as a crosslinking agent, the precursor of MIL@MIP was synthesized by sol-gel method; The template molecules in the precursor were removed by extraction, and the aqueous metal-organic framework molecularly imprinted material enriched with trace amounts of methacarb was obtained, that is, MIL@MIP. The invention obtains "imprinted holes" that are consistent with the spatial structure of the amecarb template molecule, and has a good selective recognition effect on the template molecule amecarb.

Description

technical field [0001] The invention relates to the field of novel polymer enrichment materials, in particular to a water-phase metal-organic framework molecularly imprinted polymer with good adsorption and separation functions for carbamate pesticide medicarb molecules and a preparation method thereof. The specific surface area of ​​the product is larger, so that its mass transfer rate and adsorption capacity are greatly improved compared with previous materials. Background technique [0002] Metolcarb (metolcarb; tsumacide; metacrate), alias m-tolyl-N-methyl-carbamate, molecular formula C 9 h 11 NO 2 , molecular weight 165.2, pure product is white crystal, melting point is 76-77°C, boiling point is 180°C, flash point is 145°C, hardly soluble in water, slightly soluble in ether and benzene, easily soluble in methanol and ethanol, relative density (water = 1) 1.2, decompose in alkaline solution. Belongs to moderately toxic insecticides, non-chronic toxicity, non-carcinog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/3085B01J20/226B01J20/268
Inventor 王硕王俊平钱坤方国臻
Owner TIANJIN UNIV OF SCI & TECH
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