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A carbon nanotube-based magnetic nanocomposite material and its preparation method

A technology of carbon nanotubes and magnetic nanometers, applied in the field of carbon nanotube-based magnetic nanocomposites and their preparation, can solve the problems of weakening related performance, negative environmental impact, affecting performance, etc., and achieve regular size, low cost, and dispersibility Good results

Active Publication Date: 2016-08-17
鉴翎环保科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oxidation treatment of carbon tubes will "shear" or "shear open" carbon tubes, thereby changing their original structure and affecting their original performance.
On the other hand, strong acid treatment also has a negative impact on the environment
Although other modification methods can also improve the dispersibility, hydrophilicity and chemical activity of carbon nanotubes to a certain extent, they will also weaken their other related properties to a certain extent.

Method used

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  • A carbon nanotube-based magnetic nanocomposite material and its preparation method
  • A carbon nanotube-based magnetic nanocomposite material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The preparation of embodiment 1 Ni / CNx nanocomposite material

[0034] (1), nitrogen-doped carbon nanotube material (CN X ) preparation:

[0035] 10 g of soluble iron salt FeCl 3 Dissolved in deionized water; then added dropwise to 10 g of treated NaY molecular sieves for impregnation, after completion, dried at 100-150°C for 8 hours, and then roasted at 850°C for 2 hours to obtain iron-containing carbon nano Control the spare catalyst; then use ethylenediamine as carbon source and nitrogen source, under the action of the prepared catalyst, go through chemical vapor deposition (CVD) at a flow rate of 20mL / min and set the temperature at 650~1000℃, constant temperature 0.5~ 5 hours, obtain nitrogen-doped carbon nanotube material (CN X );

[0036] (2) Preparation of Ni / CNx nanocomposites

[0037] ① The nitrogen-doped carbon nanotubes CN prepared in step (1) X Stir in HF solution for 30min to remove the residual molecular sieve;

[0038] ② The nitrogen-doped carbon nan...

Embodiment 2

[0042] The soluble iron salt FeCl in the step (1) of embodiment 1 3 With Fe(NO 3 ) 3 , Instead, other steps and conditions are the same as in Example 1, and Ni / CNx nanocomposites can also be obtained. The M-H diagram of the Ni / CNx nanocomposite is shown in figure 2 shown. It can be seen that when the applied magnetic field is about 8000 Oe, it basically reaches saturation, and the saturation magnetization (M s ) higher than 50 emu / g slightly lower than the bulk structure of pure phase metallic Ni. .

Embodiment 3

[0044] The ethylenediamine in the step (1) of Example 1 was replaced with dimethylamine, and the other steps and conditions were the same as in Example 1, and the Ni / CNx nanocomposite material could also be obtained.

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Abstract

The invention belongs to the technical field of nanometer materials, in particular to a carbon nanotube-based magnetic nanocomposite material and a preparation method thereof. In the present invention, nitrogen-doped carbon nanotubes are firstly prepared by chemical vapor deposition, and then ferromagnetic metal nanoparticles are loaded on nitrogen-doped carbon nanotubes by solvothermal method, thereby obtaining carbon nanotube-based magnetic nanocomposite materials. The beneficial effect of the invention lies in that the cost of the raw materials required by the preparation method is low, the preparation process is simple, it can be prepared in large quantities, and it is suitable for large-scale production and application. The composite material obtained by the invention has good dispersibility, and the magnetic metal nanoparticles are uniformly distributed in granular form on the surface of the nitrogen-doped carbon nanotube (CNx) and have uniform sizes.

Description

technical field [0001] The invention relates to the technical field of synthesis of nanomaterials, in particular to a carbon nanotube-based magnetic nanocomposite material and a preparation method thereof. Background technique [0002] Since the discovery of carbon nanotubes (Carbon nanotubes, CNTs) by S. Iijima in Japan in 1991, carbon nanotubes have a unique one-dimensional nanostructure, extremely high aspect ratio, hardness comparable to diamond, high toughness, excellent Electrical conductivity, thermal conductivity, and unique magnetic properties are widely used in many fields such as field electron emission, high-frequency broadband electromagnetic wave absorption and heat conduction, hydrogen storage, and catalysis. [0003] However, carbon nanotubes have the disadvantages of being easily aggregated into bundles or entanglements, and insoluble in most solvents. At the same time, compared with other nanoparticles, they are seamless tubular structures formed by curling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/33H01F41/02
Inventor 朱路平汪玲玲邴乃慈李奕怀王利军
Owner 鉴翎环保科技(上海)有限公司
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