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Magnetic PAFs solid-phase extracting agent and preparation method and application thereof

A solid-phase extraction agent and extraction agent technology are applied in chemical instruments and methods, preparation and sampling of samples for testing, etc., which can solve the problems of low oxalic acid concentration, difficulty, and difficulty in measuring its content, and achieve low preparation costs and reduced production costs. Difficulty and cost, the effect of providing adsorption efficiency

Active Publication Date: 2016-08-24
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Oxalic acid is a trace small molecular organic acid in human urine, and its concentration is closely related to the formation of urinary stones. Because there are many high-concentration interfering substances in urine, it is difficult to directly detect such small molecules. The concentration in urine is low, and its content is particularly difficult to determine

Method used

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  • Magnetic PAFs solid-phase extracting agent and preparation method and application thereof
  • Magnetic PAFs solid-phase extracting agent and preparation method and application thereof
  • Magnetic PAFs solid-phase extracting agent and preparation method and application thereof

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Embodiment Construction

[0052] The present invention will be described in more detail below through specific examples.

[0053] The preparation method of magnetic PAFs solid-phase extraction agent of the present invention comprises the following specific steps:

[0054] First step, Fe 3 o 4 Synthesis of nanoparticles:

[0055] Weigh 2.7g FeCl 3 · 6H 2 O solid in a 100ml beaker, add 80ml of ethylene glycol, sonicate to make it dissolve into a transparent solution, then add 7.2 g of anhydrous sodium acetate and 2.0 g of polyethylene glycol, and sonicate for 20 minutes. Transfer the mixed liquid to a 100ml high-pressure reactor, react at 200°C for 12 hours, and wash the ferroferric oxide generated several times with ethanol and water alternately to obtain ferric ferric oxide nanoparticles with good monodispersity (Fe 3 o 4 ) stored in a desiccator for later use;

[0056] The second step, core-shell Fe 3 o 4 @SiO 2 Synthesis of nanoparticles:

[0057] Weigh 2.0g Fe 3 o 4 In a 500ml three-n...

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Abstract

The invention discloses a magnetic PAFs solid-phase extracting agent. A preparation method of the magnetic PAFs solid-phase extracting agent includes allowing 3-aminopropyl triethoxy silylation ferroferric oxide to have a temperature-programmed reaction with piperazine and cyanuric chloride in the presence of N, N-diisopropylethylamine to obtain the magnetic PAFs solid-phase extracting agent. The magnetic PAFs solid-phase extracting agent and the preparation method thereof have the advantages that the prepared magnetic PAFs solid-phase extracting agent is good in dispersity and stable in core-shell structure; the preparation method is simple, low in cost, widely applicable, capable of achieving repeated material recycling, and the like; a covalent organic framework bonded to the ferroferric oxide can provide various action sites such as an inclusion interaction site, a hydrogen-bond interaction site, a pi-pi interaction site and an anion exchange site, so that the covalent organic framework has specific recognition and retention acting force on polar substances such as phenols and carboxylic acids.

Description

technical field [0001] The invention relates to a separation material, in particular to a magnetic PAFs solid-phase extraction agent with good dispersion, large specific surface area and stable core-shell structure. The invention also relates to a preparation method and application of the solid-phase extraction agent. Background technique [0002] Organic pollutants are widely distributed in the environment. Organic pollutants in water include polycyclic aromatic hydrocarbons, chlorobenzenes and phenols (chlorophenols, nitrophenols, phenols, bisphenol A), etc. A considerable part of organic pollutants such as benzene , naphthalene, nitrophenol, bisphenol A, etc. are carcinogenic and teratogenic. At present, activated carbon, zeolite, etc. are generally used to adsorb these organic pollutants in water. The adsorption process is cumbersome, the reusability of materials is poor, and a lot of manpower and material resources are required; Molecules), magnetic metal-organic frame...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28G01N1/34G01N1/40C02F101/30
CPCB01J20/226B01J20/28009B01J20/3085C02F1/285C02F2101/30G01N1/34G01N1/405
Inventor 陈彦龙杜慧芳徐改改赵胜男张远吴宁鹏马雪殷丹张书胜
Owner ZHENGZHOU UNIV
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