Preparing method and application thereof of functional magnetic MOFs (Metal-Organic Frameworks) material

A functionalized and amino-functionalized technology, applied in chemical instruments and methods, material separation, analysis of materials, etc., can solve the problems of long processing cycle, complicated operation, high work intensity, etc., and achieve improved adsorption performance, simple process and high efficiency. The effect of detection

Inactive Publication Date: 2014-12-24
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0003] The content of estrogen in the environment is usually very low, usually μg·L -1 or ng·L -1 In addition, due to the presence of matrix effects and other interferences, it is difficult to obtain accurate measurement results even with highly sensitive analytical instruments, so separation and enrichment are still an indispensable and important link in trace analysis
Traditional sample processing techniques such as Soxhlet extraction, ultrasonic extraction, etc., mostly have complex operations, high work intensity, long processing cycle, and need to use a large amount of volatile organic solvents, etc.

Method used

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  • Preparing method and application thereof of functional magnetic MOFs (Metal-Organic Frameworks) material
  • Preparing method and application thereof of functional magnetic MOFs (Metal-Organic Frameworks) material

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Embodiment 1

[0027] A preparation method for a functionalized magnetic MOFs material, wherein the functionalized magnetic MOFs material is a carboxyl-modified magnetic MOFs material, the steps are as follows:

[0028] 1) Preparation of carboxyl-functionalized magnetic particles

[0029] 1 g FeCl 3 ·6H 2 O and 0.2 g of sodium citrate were dissolved in 20 mL of ethylene glycol, and 1.2 g of anhydrous sodium acetate was added and stirred to dissolve, then transferred to a reaction kettle with a polytetrafluoroethylene liner, and reacted at 200 °C for 10 h, magnetic The solid was separated, washed with water and ethanol three times in turn, and then dried under vacuum at 60 °C for 12 h to prepare carboxy-functionalized Fe 3 o 4 magnetic particles; figure 1 (A) is an electron microscope image of carboxyl-functionalized magnetic particles, which shows that the synthesized carboxyl-functionalized magnetic particles are spherical with uniform particle size distribution and neat appearance.

...

Embodiment 2

[0038] A preparation method of a functionalized magnetic MOFs material, wherein the functionalized magnetic MOFs material is an amino-modified magnetic MOFs material, the steps are as follows:

[0039] 1) Preparation of amino-functionalized magnetic particles

[0040] 1.0 g FeCl 3 ·6H 2 O, 5 g of 1,6-hexamethylenediamine and 2.0 g of anhydrous sodium acetate were added to 30 mL of ethylene glycol, stirred until dissolved, then transferred to a reaction kettle with a polytetrafluoroethylene liner, and reacted at 200 ° C After 6 h, the solid was magnetically separated, washed three times with water and ethanol, and then dried under vacuum at 60 °C for 12 h to prepare amino-functionalized Fe 3 o 4 magnetic particles; figure 1 (C) is an electron microscope image of amino-functionalized magnetic particles, which shows that the amino-functionalized magnetic particles are spherical with uniform particle size distribution and neat appearance.

[0041] 2) Preparation of amino-fun...

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Abstract

The invention provides a preparing method of a functional magnetic MOFs (Metal-Organic Frameworks) material. A carboxyl or amino modified magnetic MOFs material is used as the functional magnetic MOFs material. The preparing method comprises the following steps: first, carboxyl or amino functional magnetic particles are prepared, and then, the functional magnetic MOFs material is prepared. The preparing method has the advantages that the preparing method of the functional magnetic MOFs material is simple in technology and easy to implement, the prepared functional magnetic MOFs material is used for extracting magnetic solid phases from estrogens, the regulation of the hydrophobicity, hydrophilicity and polarity of the magnetic MOFs surface is realized through the functional modification of the surfaces of Fe3O4 particles so as to realize the regulation and improvement of the absorption performance of the magnetic MOFs material, polluted trace environmental estrogens in environmental water can be efficiently absorbed and enriched, and powerful technique support is provided for the rapid, sensitive and efficient detection of the trace estrogens in the environmental water.

Description

technical field [0001] The invention relates to a method for enriching estrogen, in particular to a method for preparing a functionalized magnetic MOFs material and its application. Background technique [0002] With the rapid development of industrialization in our country, the environmental pollution is becoming more and more serious, and the environmental estrogen substances with endocrine disrupting effect have attracted people's attention day by day. Environmental estrogen is a class of steroid compounds with biological activity. After entering the human body and animals, it can affect the normal regulatory functions of the nervous, immune and endocrine systems, and can cause reproductive disorders, developmental abnormalities, certain cancers and related ecological effects. Environmental estrogens widely exist in nature, are stable in nature and are not easy to be degraded and destroyed. They are highly toxic and bioaccumulative, and can interfere with the endocrine sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/281B01J20/30G01N30/08
Inventor 黄艳凤王艳旗李颖张纪梅陈丹丹
Owner TIANJIN POLYTECHNIC UNIV
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