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Magnetic nano composite material and a preparation method and application thereof

A magnetic nano-composite material technology, applied in the field of nano-materials, can solve the problems of low metal ion adsorption performance, single type of action, low magnetism, etc., and achieve the effect of excellent adsorption performance, strong magnetism and large specific surface area

Inactive Publication Date: 2017-05-24
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] There are many factors that cause water pollution. Among them, the discharge of heavy metal wastewater and the discharge of organic dye wastewater are the two main factors that cause water pollution. However, the current graphene / chitosan adsorbent has a single effect and can only effectively adsorb One type of pollutants, and the current graphene / chitosan magnetic adsorbent has low magnetic properties and low adsorption performance for metal ions, especially heavy metal ions. At present, there is no effective treatment of metal wastewater and dye wastewater. Related reports on graphene / chitosan adsorbent

Method used

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  • Magnetic nano composite material and a preparation method and application thereof
  • Magnetic nano composite material and a preparation method and application thereof
  • Magnetic nano composite material and a preparation method and application thereof

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Experimental program
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Embodiment

[0053] One, the preparation of ferric oxide nano-microspheres:

[0054] Add 3.13g of ferric chloride hexahydrate and 0.81g of trisodium citrate dihydrate into 70mL of ethylene glycol, stir at room temperature until completely dissolved, then add 4.81g of sodium acetate, continue stirring until dissolved, then transfer to the reaction kettle , and then kept at 280° C. for 10 hours of reaction, ended the reaction, magnetically separated, washed the collected solid with deionized water until neutral, and then dried to obtain the ferric oxide nanospheres for future use.

[0055] 2. Fe 3 o 4 @SiO 2 Preparation of magnetic nanospheres:

[0056] Disperse 0.12 g of ferric oxide nano-microspheres in 102 mL of ethanol aqueous solution (96 mL of ethanol + 6 mL of water), ultrasonicate for 20 minutes to make the dispersion uniform, then add 3 mL of ammonia water, then add dropwise the ethanol containing tetraethyl silicate under stirring. solution (300μLTEOS dispersed in 5mL ethanol),...

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Abstract

The invention discloses a magnetic nano composite material and a preparation method and application thereof. The magnetic nano composite material is obtained by firstly coating ferroferric oxide with silicon dioxide to obtain Fe3O4 @ SiO2 magnetic nano microspheres, then sequentially coating the surfaces of the Fe3O4 @ SiO2 magnetic nano microspheres with chitosan, triethylene tetramine and graphene oxide layer by layer. Experiments indicate that the magnetic nano composite material has large specific surface area, good morphology structure, strong magneticity, good adsorptive property and other advantages, can be used as a heavy metal ion and organic dye adsorbent and has a good use value and an application prospect in the environment, water treatment and other fields.

Description

technical field [0001] The invention relates to a magnetic nanocomposite material and its preparation method and application, belonging to the technical field of nanomaterials. Background technique [0002] With the rapid development of science and technology and the improvement of people's quality of life, the problem of environmental pollution has become more and more serious, among which water pollution is particularly serious. The quality of water closely affects people's health. The existing sewage treatment technologies include ion exchange method, membrane filtration method, electrochemical method, photocatalytic degradation method, biodegradation method, and adsorption method. Among them, the adsorption method has become one of the most commonly used methods in sewage treatment because of its high efficiency, simple operation, and low price. However, the adsorption method still has shortcomings such as low adsorption capacity, difficult recovery, poor selectivity, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/36C02F101/38
CPCB01J20/24B01J20/06B01J20/103B01J20/20B01J20/22B01J20/28004B01J20/28009B01J20/28021B01J20/28057B01J2220/4825C02F1/286C02F1/288C02F2101/20C02F2101/36C02F2101/38C02F2101/40
Inventor 王帆张丽娟陆杰樊学学
Owner SHANGHAI UNIV OF ENG SCI
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