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Method for preparing magnetic compound material of ferric oxide cladded carbon nanotube

A technology of magnetic composite material and ferric oxide, applied in the direction of metal material coating process, etc., can solve the problems of complex method, unexplored magnetic properties of composite materials, long reaction time, etc.

Inactive Publication Date: 2005-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, Jiang et al. reported on ChemMater15 (2003) 2848 that Fe was synthesized in situ by solvothermal method using iron urea and carbon nanotubes as precursors. 3 o 4 Coated carbon nanotube composite materials, but the method used is complicated, the reaction time required is long, and the magnetic properties of the composite materials have not yet been explored

Method used

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  • Method for preparing magnetic compound material of ferric oxide cladded carbon nanotube
  • Method for preparing magnetic compound material of ferric oxide cladded carbon nanotube
  • Method for preparing magnetic compound material of ferric oxide cladded carbon nanotube

Examples

Experimental program
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Effect test

Embodiment 1

[0025] At room temperature, 27gFe(NO 3 ) 3 9H 2 O and 200ml of concentrated nitric acid were stirred and mixed at a speed of 600 rpm, then 5g of carbon nanotubes were added, ultrasonically dispersed, and refluxed in an oil bath at 120°C for 4.5 hours, and the temperature of the refluxed mixture was lowered to 20°C. The wt% ammonia water is titrated until the pH is 10, the titrated solution is filtered with a 0.65 μm filter membrane, and the filtrate is washed with deionized water several times, dried in an oven at 80°C for 12 hours, and the filtrate is dried Finally, the carbon nanotubes coated with iron hydroxide were obtained, put them into a quartz boat, put them into a tube-type atmosphere furnace, feed nitrogen gas, the gas flow rate was 1 liter / min, and the heating rate was 5°C / min, from room temperature to 250 ℃, after 1 hour of heat preservation, at 10℃min -1 The temperature was raised to 650° C., calcined at 650° C. for 2 hours, and naturally cooled to room tempera...

Embodiment 2

[0033] At room temperature, 21gFeCl 3 Stir and mix with 100ml of concentrated nitric acid at a speed of 400 rpm, then add 2.5g of carbon nanotubes, ultrasonically disperse, and prepare according to the method described in Example 1 below. X-ray diffraction and transmission electron microscopy analysis show that the carbon nanotubes are coated with ferric oxide, and the magnetic test shows that the magnetic properties of the material after coating are obviously improved.

Embodiment 3

[0035] At room temperature, 27gFe(NO 3 ) 3 9H 2O and 200ml of concentrated nitric acid were stirred and mixed at 800 rpm, then 5g of carbon nanotubes were added, ultrasonically dispersed, and refluxed in an oil bath at 120°C for 4.5 hours. When the temperature of the refluxed mixture dropped to room temperature, use 2.0 The sodium hydroxide of wt% is titrated, and is prepared by the method described in Example 1 below. X-ray diffraction and transmission electron microscopy analysis show that the carbon nanotubes are coated with ferric oxide, and the magnetic test shows that the magnetic properties of the material after coating are obviously improved.

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Abstract

The invention discloses a method for preparing magnetic composite material of a carbon nanometer tube covered with di-iron trioxide. The invention makes the carbon nanometer tube reflux in the nitric acid, to introduce several function groups such as carboxyl group, hydroxyl group and carbonyl group in the tube wall, which can adsorb iron ions in the solution. Then the iron ions adsorbed in the tube wall react with the hydroxide ion in the ammonial solution, which coated the hydroxide ion on the tube, and the tube can be coated with di-iron trioxide by calcining. The invention provides a simple way to get composite material, good performance soft magnetic material, which is facilitating to industrial production, and may be used in the areas of high-density magnetic recording material, wave-absorbing material, ink for electrophotographic copying, broad-cellulae transformer, noise filter, voltage transformer for communicating and so an.

Description

technical field [0001] The invention relates to a preparation method of a magnetic composite material, in particular to a preparation method of a novel magnetic composite material coated with ferric oxide and carbon nanotubes. Background technique [0002] Magnetic composite materials are widely used in the preparation of high-density magnetic recording materials for data storage, as well as in the preparation of wave-absorbing materials, inks for electrostatic printing, broadband transformers, noise filters, and communication transformers. [0003] Carbon nanotubes have many novel properties, which have attracted great attention from scientists. Studies have shown that the coated carbon nanotube composites exhibit more excellent physical and chemical properties, such as better electrical conductivity, mechanical properties, optical properties, adsorption properties and wave absorption properties, etc., and have broader application prospects . [0004] At present, the main...

Claims

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Application Information

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IPC IPC(8): C23C22/60C23C22/82
Inventor 朱美芳曹慧群李耀刚张君辉
Owner DONGHUA UNIV
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