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Preparation method and application of magnetic MOF composite

A composite material and magnetic technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of limited adsorption capacity and small specific surface area, and achieve adjustable pore size, large specific surface area, and simple preparation Effect

Inactive Publication Date: 2017-07-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Methylene blue is a common organic dye. The traditional adsorbents for methylene blue are mainly carbon materials, but their specific surface area is relatively small, which limits their adsorption capacity.

Method used

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  • Preparation method and application of magnetic MOF composite
  • Preparation method and application of magnetic MOF composite
  • Preparation method and application of magnetic MOF composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of preparation method of magnetic MOF composite material, concrete steps are as follows:

[0023] (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 reaction kettle, react at a temperature of 180°C for 7h, cool to room temperature, wash with ethanol and deionized water, and carry out by a magnet Magnetic Fe 3 o 4 nanoparticles;

[0024] (2) According to nano Fe 3 o 4 The solid-to-liquid ratio g:mL of particles and deionized water is a ratio of 0.57:100, and the nano-Fe obtained in step (1) 3 o 4 Disperse in deionized water, and carry out ultrasonic dispersion for 30min, in an inert gas N 2 Under the atmosphere, heated to a temperature of 60°C to obtain nano-Fe 3 o 4 Suspension, the Na 2 SiO 3 Solution (Na 2 SiO 3 The concentration of t...

Embodiment 2

[0028] Embodiment 2: a kind of preparation method of magnetic MOF composite material, concrete steps are as follows:

[0029] (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;

[0030] (2) According to nano Fe 3 o 4 The solid-to-liquid ratio g:mL of particles and deionized water is the ratio of 0.60:100, and the nano-Fe obtained in step (1) 3 o 4 Disperse in deionized water, and carry out ultrasonic dispersion for 40min, in an inert gas N 2 Under the atmosphere, heated to a temperature of 65°C to obtain nano-Fe 3 o 4 Suspension, the Na 2 SiO 3 Solution (Na 2 SiO 3 The concentration of the solution is 1.2mol...

Embodiment 3

[0034] Embodiment 3: a kind of preparation method of magnetic MOF composite material, concrete steps are as follows:

[0035] (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;

[0036] (2) According to nano Fe 3 o 4 The solid-to-liquid ratio g:mL of particles to deionized water is a ratio of 0.65:100, and the nano-Fe obtained in step (1) 3 o 4 Disperse in deionized water, and carry out ultrasonic dispersion for 50min, in an inert gas N 2 Under the atmosphere, heated to a temperature of 70°C to obtain nano-Fe 3 o 4 Suspension, the Na 2 SiO 3 Solution (Na 2 SiO 3 The concentr...

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Abstract

The invention relates to a preparation method and application of a magnetic MOF composite and belongs to the technical field of material preparation. The preparation method comprises the following steps: preparing superparamagnetic ferroferric oxide nanoparticles by adopting a solvent thermal process, taking superparamagnetic ferroferric oxide as a core, coating a silicon dioxide shell on the surface of ferroferric oxide by adopting a hydrolysis method, so that Fe3O4@SiO2 nanoparticles are obtained, dissolving ferric trichloride hexahydrate and terephthalic acid into methylene formamide (DMF) to obtain DMF mixed liquor, then adding the Fe3O4@SiO2 nanoparticles and the DMF mixed liquor into a reaction kettle, and reacting, so that the magnetic MOF composite is obtained. The magnetic MOF composite can be used for adsorption of organic dye methylene blue.

Description

technical field [0001] The invention relates to a preparation method and application of a magnetic MOF composite material, belonging to the technical field of material preparation. Background technique [0002] With the rapid development of my country's dye and printing and dyeing industries, the discharge of dye wastewater has increased rapidly, and a large number of organic pollutants that are difficult to biodegrade are discharged into water bodies, causing serious water pollution. Methylene blue is a common organic dye. The traditional adsorbents for methylene blue are mainly carbon materials, but their specific surface area is relatively small, which limits their adsorption capacity. Contents of the invention [0003] The present invention aims at the shortcomings of existing methylene blue adsorbents, and provides a preparation method and application of a magnetic MOF composite material. A solvothermal method is used to prepare superparamagnetic ferroferric oxide nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/06B01J20/103B01J20/226C02F1/288B01J20/28009B01J20/28019C02F2101/308
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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