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Method for preparing manganese zinc ferrite-coated carbon nano tube magnetic material

A technology of manganese zinc ferrite and carbon nanotubes, which is applied in the direction of magnetic materials, magnetic objects, and the magnetism of inorganic materials, can solve the problems of wasting water and increasing synthesis costs, and achieve low cost, less pollution, and easy industrial production Effect

Inactive Publication Date: 2010-09-15
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Qi Zhang et al. reported on Materials Chemistry and Physics 116 (2009) 658 that manganese zinc ferrite nanospheres were coated on carbon nanotubes by a hydrothermal method, but a large amount of sodium acetate was added during the hydrothermal process. There are also organics polyvinylpyrrolidone and polyethylene glycol, which will increase the cost of synthesis and also waste a lot of water for final washing

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  • Method for preparing manganese zinc ferrite-coated carbon nano tube magnetic material
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  • Method for preparing manganese zinc ferrite-coated carbon nano tube magnetic material

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Embodiment 1

[0028] At room temperature, press Mn 2+ : Zn 2+ : Fe 3+ The molar ratio is 0.5:0.5:2 to weigh MnSO 4 , Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, add distilled water, sonicate to dissolve the salt completely, add carbon nanotubes with functional groups such as carboxyl and hydroxyl, and sonicate again to disperse evenly, then use 5M NaOH solution to titrate the above mixture, and use a magnetic stirrer during the titration Stir at a speed of 600 rpm. When the pH value = 9, the titration is completed. After adding 2ml of acetic acid, put the reactant in a 100ml hydrothermal kettle at 200°C and react for 8 hours. After the reaction is complete, wait for the system to cool down to room temperature , filter the reactant, wash the filtrate with a large amount of distilled water until pH = 7, then rinse with ethanol, and further dry in an oven at 80° C. for 12 hours to obtain a carbon nanotube magnetic composite material coated with manganese zinc ferrite.

[0029] Figure 1...

Embodiment 2

[0036] At room temperature, press Mn 2+ : Zn 2+ : Fe3+ The molar ratio is 0.6:0.4:2 to weigh MnSO 4 , Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, add distilled water, sonicate to dissolve the salt completely, add carbon nanotubes with functional groups such as carboxyl and hydroxyl, and sonicate again to disperse evenly, then use 5M KOH solution to titrate the above mixture, and use a magnetic stirrer during the titration Stir at a speed of 600 rpm. When the pH value = 9, the titration is completed. After adding 4ml of acetic acid, put the reactant in a 100ml hydrothermal kettle at 220°C and react for 8 hours. After the reaction is complete, wait for the system to cool down to room temperature , filter the reactant, wash the filtrate with a large amount of distilled water until pH = 7, then rinse with ethanol, and further dry in an oven at 80° C. for 12 hours to obtain a carbon nanotube magnetic composite material coated with manganese zinc ferrite.

Embodiment 3

[0038] At room temperature, press Mn 2+ : Zn 2+ : Fe 3+ The molar ratio is 0.5:0.5:2 to weigh MnSO 4 , Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, add distilled water, sonicate to dissolve the salt completely, add carbon nanotubes with functional groups such as carboxyl and hydroxyl, and sonicate again to disperse evenly, then use 5M NaOH solution to titrate the above mixture, and use a magnetic stirrer during the titration Stir at a speed of 600 rpm. When the pH value = 9, the titration is completed. After adding 2ml of acetic acid, put the reactant in a 100ml hydrothermal kettle at 180°C and react for 20 hours. After the reaction is complete, wait for the system to cool down to room temperature , filter the reactant, wash the filtrate with a large amount of distilled water until pH = 7, then rinse with ethanol, and further dry in an oven at 80° C. for 12 hours to obtain a carbon nanotube magnetic composite material coated with manganese zinc ferrite.

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Abstract

The invention provides a method for preparing a manganese zinc ferrite-coated carbon nano tube magnetic material. The method is mainly characterized in that: carbon nano tubes with hydroxy and carboxyl and soluble Mn2+, Zn2+ and Fe3+ salt in a certain weight ratio are used as raw materials; and the method comprises the following steps of: fully mixing the raw materials, then performing titration by using strong alkali solution, then adding a certain amount of acetic acid into the solution, performing hydrothermal reaction on the solution, and filtering, washing and drying a reaction product to obtain the manganese zinc ferrite-coated carbon nano tube magnetic material. The manganese zinc ferrite-coated carbon nano tube magnetic material with different grain diameters can be obtained by adjusting the adding amount of iron salt and the temperature and time of the hydrothermal reaction. The method has the characteristics of simple process, less pollution, energy conservation, low production cost, large-scale production and the like.

Description

technical field [0001] The invention discloses a method for preparing a manganese-zinc ferrite-coated carbon nanotube magnetic composite material, which can be used for preparing one-dimensional nano-magnetic materials and belongs to the field of nano-materials. Background technique [0002] Manganese-zinc ferrite material has the characteristics of high magnetic permeability, high saturation magnetization, and low loss in medium and high frequencies. It is widely used in filters, broadband transformers, common mode choke coils, and signals of various communications and transmission equipment. Transmission system, in electronic ballasts. The use of nanotechnology can greatly improve the performance of materials. However, the key to preparing nano-ferrite is to prepare non-agglomerated and uniform nano-powder. The preparation of ferrite nanopowder mainly adopts wet chemical methods, such as co-precipitation method, sol-gel method, hydrothermal method, supercritical method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/00H01F1/34C04B35/628
Inventor 曹慧群于斌罗仲宽王芳
Owner SHENZHEN UNIV