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Composite material by using carbon nano-tube as core and ferriferrous oxide as shell and preparation method thereof

A technology of ferroferric oxide and carbon nanotubes, which is applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of rare special morphology and structure, and achieve novel structure and advanced technology. Simple, low-cost effect

Active Publication Date: 2015-12-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The ferroferric oxide involved in the prior art is basically granular, and some other special morphology structures are rare

Method used

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  • Composite material by using carbon nano-tube as core and ferriferrous oxide as shell and preparation method thereof
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  • Composite material by using carbon nano-tube as core and ferriferrous oxide as shell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Weigh 1 g of multi-walled carbon nanotubes, disperse them in 200 mL of deionized water, add dilute hydrochloric acid, and adjust the pH to 3.5. Add dropwise the Fenton reagent prepared by 100ml of hydrogen peroxide with a mass concentration of 30% and 100ml of a ferrous chloride solution with a concentration of 0.1mol / L under ultrasonic stirring conditions. After the dropwise addition is completed within 6 hours, add excess reduced iron powder and continue Stir ultrasonically for 0.5h, and remove excess iron powder by magnetic adsorption;

[0025] (2) Take the suspension obtained in step (1), according to Fe 2+ Concentration, add equivalent OH -1 The urea was heated up to 95°C, and reacted with mechanical stirring at 200rmp for 1h. After the end, the final product was obtained through further processes such as separation, washing, drying at 200°C, and crushing.

Embodiment 2

[0027] (1) Weigh 1 g of multi-walled carbon nanotubes, disperse them in 50 ml of deionized water, add dilute hydrochloric acid, and adjust the pH to 3.5. Under the condition of ultrasonic stirring, add Fenton's reagent () prepared by 100ml of hydrogen peroxide with a mass concentration of 30% and 20ml of ferrous chloride solution with a concentration of 0.1mol / L, and add excess reduced iron powder after 1 hour. Continue ultrasonic stirring for 0.5 h, and remove excess iron powder by magnetic adsorption.

[0028] (2) Take the suspension obtained in step (1), according to Fe 2+ Concentration, add 0.5 times the equivalent of OH -1 The hexamethylenetetramine was heated to 75°C, and reacted with mechanical stirring at 1000rmp for 4 hours. After the end, the final product was obtained through further processes such as separation, washing, drying at 80°C, and crushing.

Embodiment 3

[0030] (1) Weigh 1 g of single-walled carbon nanotubes, disperse them in 500 ml of deionized water, add dilute hydrochloric acid, and adjust the pH to 3. Under the condition of ultrasonic stirring, add the Fenton reagent prepared by 400ml of hydrogen peroxide with a mass concentration of 30% and 50ml of ferrous sulfate solution with a concentration of 0.2mol / L. After 12 hours of dropping, add excess reduced iron powder and continue ultrasonic stirring. 4h, remove excess iron powder by magnetic adsorption method.

[0031] (2) Take the suspension obtained in step (1), according to Fe 2+ Concentration, add 0.5 times the equivalent of OH -1 The hexamethylenetetramine was heated to 85°C, and reacted with mechanical stirring at 2500rmp for 12h. After the end, the final product was obtained through further processes such as separation, washing, drying at 120°C, and crushing.

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Abstract

The invention relates to a composite material by using a carbon nano-tube as a core and ferriferrous oxide as a shell and a preparation method thereof. The composite material is characterized in that a Fenton reagent comprising FeCl2 / H2O2, reductant iron powder, a carbon nano-tube and precipitant urea or hexamethylenetetramine are used as raw materials. The preparation method comprises the following steps of, firstly, performing surface hydroxylation modification on the carbon nano-tube with the Fenton reagent; then, adding a proper amount of the iron powder to regulate the concentration of Fe<2+> ions, further precipitating the iron ions with urea or hexamethylenetetramine by adopting a homogeneous precipitation method under a proper condition; and finally, conducting separating, washing, drying and other processes on the precipitate to obtain a final product. The carbon nano-tube / ferriferrous oxide composite material with a 'core-shell' structure is characterized by having a special structure by using the carbon nano-tube as the core and the ferriferrous oxide as the shell; and ferriferrous oxide having a continuous thin-layer structure uniformly covers the outer surface of the carbon nano-tube, and the interface between the core and the shell is weak. The preparation method is simple in process, and the product has a wide application prospect in chemical catalysis, sensors, new energy materials, electromagnetic shielding materials, high-performance polymer-based composite materials and other fields.

Description

technical field [0001] The invention belongs to the technical field of processing and application of carbon nanomaterials, and in particular relates to a composite material with carbon nanotubes as the core and ferroferric oxide as the shell and a preparation method thereof. Background technique [0002] Carbon nanotubes have excellent mechanical properties and electrothermal and magnetic functional properties, and are an ideal nanocarbon material. After more than 20 years of basic and applied research, a large number of research results and technological progress have been made in the field of carbon nanotube research. The performance of composite materials is also commonly used in fields such as microwave absorption, catalysts, electrochemistry, and new energy. Although carbon nanotubes have many excellent properties, in some fields, only proper surface modification or processing of carbon nanotubes can give full play to their outstanding characteristics, so that the appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28B01J23/745
Inventor 马传国周还潮戴培邦卢江荣王亚珍
Owner GUILIN UNIV OF ELECTRONIC TECH
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