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Preparation method and application of modified Fe3O4@MOF composite material

A composite material and modification technology, applied in chemical instruments and methods, water/sludge/sewage treatment, alkali metal compounds, etc., can solve problems such as difficult removal, secondary pollution, and difficult separation of sediments, and achieve easy Effects of recycling, easy magnetic separation, and increased selective adsorption

Active Publication Date: 2017-08-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because mercury exists in many forms in wastewater, it is difficult to remove it by general methods
At present, the main method used in industry is the precipitation method, but the precipitate generated during the treatment process is not easy to separate, and the unused precipitant will cause secondary pollution

Method used

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  • Preparation method and application of modified Fe3O4@MOF composite material
  • Preparation method and application of modified Fe3O4@MOF composite material
  • Preparation method and application of modified Fe3O4@MOF composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: a kind of modified Fe 3 o 4 The preparation method of @MOF composite material, the specific steps are as follows:

[0025] (1) Add 1.5g FeCl 3 ·6H 2 O was dissolved in 30 mL of ethylene glycol solvent, and 0.8 g of acetic acid trihydrate (FeCl 3 ·6H 2 The mass ratio of O to acetic acid trihydrate is 1.5:0.8) Stir for 30min, pour the resulting mixture into a stainless steel reactor, react at a temperature of 180°C for 7h, cool to room temperature, wash with ethanol and deionized water, and carry out magnetization Magnetic Fe 3 o 4 nanoparticles;

[0026] (2) Dissolve l,3,5-benzenetricarboxylic acid in ethanol to obtain ethanol solution of l,3,5-benzenetricarboxylic acid, in which l,3,5-benzenetricarboxylic acid in alcohol solution l,3,5 -The concentration of benzenetricarboxylic acid is 10mmol / L, and the 0.3g nanometer Fe of step (1) 3 o 4 Dispersed into 90mL ethanol solution of l,3,5-benzenetricarboxylic acid, in which nano-Fe 3 o 4 The solid-t...

Embodiment 2

[0031] Embodiment 2: a kind of modified Fe 3 o 4 The preparation method of @MOF composite material, the specific steps are as follows:

[0032] (1) Add 1.5g FeCl 3 ·6H 2 O was dissolved in 35 mL of ethylene glycol solvent, and 1.0 g of acetic acid trihydrate (FeCl 3 ·6H 2 The mass ratio of O to acetic acid trihydrate is 1.5: 1.0) Stir for 35min, pour the resulting mixture into a stainless steel reactor, react at a temperature of 185°C for 7h, cool to room temperature, wash with ethanol and deionized water, and conduct Magnetic Fe 3 o 4 nanoparticles;

[0033] (2) Dissolve l,3,5-benzenetricarboxylic acid in ethanol to obtain ethanol solution of l,3,5-benzenetricarboxylic acid, in which l,3,5-benzenetricarboxylic acid in alcohol solution l,3,5 -The concentration of benzenetricarboxylic acid is 12mmol / L, and the 0.35g nanometer Fe of step (1) 3 o 4 Disperse in 80mL l,3,5-benzenetricarboxylic acid ethanol solution, in which nano-Fe 3 o 4 The solid-to-liquid ratio g:mL ...

Embodiment 3

[0037] Embodiment 3: a kind of modified Fe 3 o 4 The preparation method of @MOF composite material, the specific steps are as follows:

[0038] (1) Add 2.5g FeCl 3 ·6H 2 O was dissolved in 40 mL of ethylene glycol solvent, and 1.0 g of acetic acid trihydrate (FeCl 3 ·6H 2 The mass ratio of O to acetic acid trihydrate is 2.5:1.0) Stir for 35min, pour the resulting mixture into a stainless steel reactor, react at a temperature of 190°C for 7.5h, cool to room temperature, wash with ethanol and deionized water, pass through a magnet Separation to obtain magnetic Fe 3 o 4 nanoparticles;

[0039] (2) Dissolve l,3,5-benzenetricarboxylic acid in ethanol to obtain ethanol solution of l,3,5-benzenetricarboxylic acid, in which l,3,5-benzenetricarboxylic acid in alcohol solution l,3,5 -The concentration of benzenetricarboxylic acid is 15mmol / L, the 0.40g nanometer Fe of step (1) 3 o 4 Disperse into 85mL l,3,5-benzenetricarboxylic acid ethanol solution, in which nano-Fe 3 o 4 T...

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PUM

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Abstract

The invention relates to a preparation method and application of a modified Fe3O4@MOF composite material, belonging to the technical field of material preparation. According to the invention, super-paramagnetic ferriferrous oxide nanoparticles are prepared by using a solvothermal method; a layer-upon-layer self-assembly method is utilized for deposition of metal central ions and organic ligand on the surface of super-paramagnetic ferriferrous oxide used as a core so as to realize in-situ synthesis of a Fe3O4@MOF composite material; and the Fe3O4@MOF composite material is subjected to surface modification so as to obtain the modified Fe3O4@MOF composite material. The modified Fe3O4@MOF composite material is applicable to adsorption of heavy metal mercury ions in industrial waste water.

Description

technical field [0001] The invention relates to a modified Fe 3 o 4 The preparation method and application of @MOF composite materials belong to the field of material preparation technology. Background technique [0002] In my country, a large amount of mercury-containing industrial wastewater is discharged into rivers every year, resulting in serious water pollution and a threat to human health, as well as the loss of a large amount of mercury metal. Because mercury exists in many forms in wastewater, it is difficult to remove it by general methods. At present, the main method used in the industry is the precipitation method, but the precipitate generated during the treatment process is not easy to separate, and the unused precipitant will cause secondary pollution. Contents of the invention [0003] The present invention provides modified Fe 3 o 4 The preparation method and application of @MOF composite materials, using the solvothermal method to prepare superparama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28C02F1/28B01J20/30C02F101/20
CPCB01J20/06B01J20/226C02F1/288B01J20/28009C02F2101/20
Inventor 汤立红金旭李凯宁平孙鑫包双友朱婷婷张秀英周玲玲
Owner KUNMING UNIV OF SCI & TECH
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