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Magnetic aerogel and preparation method thereof

An aerogel and magnetic technology, applied in chemical instruments and methods, colloidal chemistry, colloidal chemistry, etc., to achieve the effects of good electrical conductivity, large specific surface area, and improved adsorption performance

Inactive Publication Date: 2014-08-13
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are no reports on magnetic aerogel materials and preparation methods using graphene oxide / graphene as a carrier and carbon nanotubes as a skeleton in the literature. Therefore, the preparation of magnetic aerogel materials based on graphene is crucial for optimization The performance of magnetic materials and the application of expanded materials have far-reaching influence

Method used

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  • Magnetic aerogel and preparation method thereof
  • Magnetic aerogel and preparation method thereof
  • Magnetic aerogel and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Put 2g of graphite powder in a third-grade flask, add a mixture of 41.4ml of concentrated sulfuric acid and 4.6ml of phosphoric acid under ice-bath stirring, and after stirring for 15min, slowly add 12g of potassium permanganate to keep the system temperature not higher than 20°C. Stir for 30 minutes; remove the ice bath, place the reaction system in a water bath at 35°C, stir thoroughly for 2 hours, the reactant turns into a dark brown paste; slowly add 20ml of deionized water to the reactant, and control the temperature of the system not to exceed 98°C, when the temperature no longer rises, quickly transfer it to a 98°C water bath and stir for 15 minutes; add 280ml, 50°C deionized water and 20ml 30% hydrogen peroxide to the reactant in turn, and the reactant changes from brown to Bright yellow; after stirring for 5 minutes, take it out and filter while it is hot to obtain a tan filter cake, centrifuge and wash the product 3 times with 300ml and 3% hydrochloric acid...

Embodiment 2

[0035] (1) Put 1g of graphite powder in a third-grade flask, add a mixture of 20.7ml of concentrated sulfuric acid and 2.3ml of phosphoric acid under ice bath stirring, and after stirring for 15min, slowly add 6g of potassium permanganate to keep the system temperature not higher than 20°C. Stir for 30 minutes; remove the ice bath, place the reaction system in a 35°C water bath, stir for 2 hours, and the reactant turns into a dark brown paste; slowly add 10ml of deionized water to the reactant, and control the temperature of the system not to exceed 98°C, when the temperature no longer rises, quickly transfer it to a 98°C water bath and stir for 15 minutes; add 140ml, 50°C deionized water and 10ml 30% hydrogen peroxide to the reactant in turn, and the reactant changes from brown to Bright yellow; after stirring for 5 minutes, take it out and filter while it is hot to obtain a tan filter cake, centrifuge and wash the product 3 times with 150ml of 3% hydrochloric acid, then repea...

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Abstract

The invention discloses magnetic aerogel and a preparation method thereof. The preparation method comprises the following steps: loading ferroferric oxide magnetic nanoparticles by taking graphene oxide as a carrier, improving the morphological stability by taking a carbon nano tube as a framework or by using a calcium ion cross-linking effect, freezing and drying to obtain graphene oxide magnetic aerogel, and performing chemical reduction so as to obtain the graphene magnetic aerogel. On the basis of maintaining the ferroferric oxide magnetic effect, the aerogel also has the advantages of low density, great strength, high-temperature resistance and large specific surface area; due to the structure characteristic, the aerogel has the super strong absorption capacity, wave absorption capacity and conductivity; the magnetic aerogel can be used in the fields of sewage treatment, target administration, wave absorption materials and photoelectric materials. The magnetic aerogel is a novel functional magnetic material.

Description

technical field [0001] The invention relates to a magnetic airgel material and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] Magnetic porous materials can be used in sewage treatment, targeted drug delivery, microwave adsorption (such as radar absorbing materials) and other fields. The research has great significance and has attracted extensive attention. The above application fields require the corresponding materials to have the characteristics of low density, large specific surface area, strong adsorption capacity, and strong loading capacity, while good magnetic properties are the necessary conditions for easy recycling of materials, strong targeting ability, and microwave adsorption. However, existing materials are often difficult to meet multiple performance requirements at the same time. Taking microwave-absorbing materials as an example, because of its high requirements on electromagnetic proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B01J20/20B01J20/28B01J20/30
Inventor 陈宇岳熊佳庆徐思峻林红
Owner SUZHOU UNIV
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