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Magnetic nanocomposite based on two-dimensional stratified material magadiite, and preparation method and application thereof

A wollastite and magnetic nano technology, applied in the field of magnetic nano composite materials and their preparation, can solve the problems of easy agglomeration, influence on catalysis and adsorption performance, etc., and achieve the effects of low cost, easy operation and good adsorption effect.

Inactive Publication Date: 2018-09-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ferroferric oxide is a strong magnetic nanoparticle with a large specific surface area, superparamagnetism and good biocompatibility, but it is prone to agglomeration, which seriously affects its catalytic and adsorption properties.

Method used

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  • Magnetic nanocomposite based on two-dimensional stratified material magadiite, and preparation method and application thereof
  • Magnetic nanocomposite based on two-dimensional stratified material magadiite, and preparation method and application thereof
  • Magnetic nanocomposite based on two-dimensional stratified material magadiite, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation of magadite / ferroferric oxide magnetic nanocomposite is as follows:

[0045] (1) Weigh 2.5 g of magadiite, add 50 mL of distilled water, and ultrasonically disperse for 30 minutes, then stir in a magnetic stirrer for 12 h to obtain a dispersion of magadiite;

[0046] (2) Weigh 0.2982g FeCl 2 ·4H 2 O and 0.3244g of anhydrous FeCl 3 Add 50mL of distilled water and stir to dissolve to obtain iron salt solution;

[0047] (3) After stirring and N 2 Under protection, add the dispersion of magadiite in step (1) to the iron salt solution in step (2) to obtain a mixed solution, heat the mixed solution to 80°C, and then add sodium hydroxide solution dropwise to adjust pH to 11, continue at N 2 The reaction was magnetically stirred for 2 hours under protection, cooled to room temperature, the precipitated product was washed 3 times with absolute ethanol, dried in vacuum at 60° C. to constant weight, and ground to obtain the magadiite / ferroferric oxide magnetic nanocomposi...

Embodiment 2

[0053] The preparation of magadite / ferroferric oxide magnetic nanocomposite is as follows:

[0054] (1) Weigh 1g of magadiite, add 50mL of distilled water, ultrasonically disperse for 10 minutes, and then stir in a magnetic stirrer for 6 hours to obtain a dispersion of magadiite;

[0055] (2) Weigh 0.1988g FeCl 2 ·4H 2 O and 0.3244g of anhydrous FeCl 3 Add 50mL of distilled water and stir to dissolve to obtain iron salt solution;

[0056] (3) After stirring and N 2 Under protection, add the dispersion of magadiite in step (1) to the iron salt solution in step (2) to obtain a mixed solution, heat the mixed solution to 50°C, and then add sodium hydroxide solution dropwise Adjust the pH to 9 and continue at N 2 Under protection, the reaction was magnetically stirred for 1 hour, cooled to room temperature, the precipitated product was washed with absolute ethanol 3 times, dried in vacuum at 80°C to a constant weight, and ground to obtain the magadiite / ferroferric oxide magnetic nanocompo...

Embodiment 3

[0063] The preparation of magadite / ferroferric oxide magnetic nanocomposite is as follows:

[0064] (1) Weigh 2g of magadiite, add 50mL of distilled water, ultrasonically disperse for 20 minutes, and then stir in a magnetic stirrer for 8 hours to obtain a dispersion of magadiite;

[0065] (2) Weigh 0.497g FeCl 2 ·4H 2 O and 0.3244g of anhydrous FeCl 3 Add 50mL of distilled water and stir to dissolve to obtain iron salt solution;

[0066] (3) After stirring and N 2 Under protection, add the dispersion of magadiite in step (1) to the iron salt solution in step (2) to obtain a mixed solution, heat the mixed solution to 95°C, and then add sodium hydroxide solution dropwise Adjust the pH to 12, continue at N 2 Under the protection, the reaction was magnetically stirred for 1.5 hours, cooled to room temperature, the precipitated product was washed 3 times with absolute ethanol, dried in vacuum at 40° C. to constant weight, and ground to obtain the magadiite / ferroferric oxide magnetic nanoc...

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Abstract

The invention discloses a magnetic nanocomposite based on a two-dimensional stratified material magadiite, and a preparation method and application thereof. According to the method, the magnetic nanocomposite based on the two-dimensional stratified material magadiite is compounded at one step based on the coprecipitation method, and ferroferric oxides in the compounded magnetic nanocomposite are loaded among layers and on the surface of the magadiite evenly, so that the problems that ferroferric oxide nanoparticles are easy to agglomerate and the magadiite serving as an adsorbent is difficultto separate are solved, and the magnetic nanocomposite has paramagnetism and biological compatibility as the ferroferric oxides as well as ion exchange property and adsorbability as the magadiite. Themagnetic nanocomposite, and the preparation method and the application thereof have the advantage of simple process, easiness in operation, non-existence of harmful substances in raw materials, environment protection, energy conservation, low cost and easiness in industrial production. The magnetic nanocomposite based on the two-dimensional stratified material magadiite is applied to remove organic dye in water pollutants, have good adsorption performance and can be separated quickly under the action of an external magnetic field.

Description

Technical field [0001] The invention relates to the field of magnetic nanocomposite materials, in particular to a magnetic nanocomposite material based on a two-dimensional layered material magadite, and a preparation method and application thereof. technical background [0002] Magadiite (MD) is a layered silicate material in the shape of rose petals. It has good swelling properties between the layers and has strong adsorption to water and some small polar organic molecules. Capability: There is a negative charge between the layers, which can be ion exchanged with cations, and has a high ion exchange capacity; the magadiite sheet has more active hydroxyl groups, which can be functionally modified. Magadite has a large specific surface area and strong adsorption capacity, and has outstanding application value in the fields of nanocomposite materials, adsorption materials, catalyst carriers, zeolite molecular sieves and other fields. [0003] Ferroferric oxide is a strong magnetic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28C02F1/48C02F101/30
CPCB01J20/10B01J20/28009C02F1/281C02F1/488C02F2101/308C01B33/405C02F1/288C02F2305/08C01P2004/20C01P2006/42C01P2006/82
Inventor 戈明亮朱彩萍
Owner SOUTH CHINA UNIV OF TECH
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