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A kind of preparation method of non-metal element doped carbon-coated metal nanoparticle magnetic composite material

A technology of metal nanoparticles and magnetic composite materials, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of inability of the pyrolysis process of metal precursors, non-metallic element doping, and non-magnetic carbon coating materials. , to achieve the effect of high degree of graphitization, large specific surface area and good dispersion

Active Publication Date: 2018-05-01
合肥庐阳科技创新集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to provide a method for preparing a non-metallic element-doped carbon-coated metal nanoparticle magnetic composite material. Technical problems such as non-magnetic coating materials and non-metal element doping have not been realized

Method used

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  • A kind of preparation method of non-metal element doped carbon-coated metal nanoparticle magnetic composite material
  • A kind of preparation method of non-metal element doped carbon-coated metal nanoparticle magnetic composite material
  • A kind of preparation method of non-metal element doped carbon-coated metal nanoparticle magnetic composite material

Examples

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Effect test

Embodiment 1

[0032] (1) Weigh 10.09g (120mmol) dicyandiamide (C 2 h 4 N 4 ) and 2.445g (8.4mmol) cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2O) add in the beaker that contains 300mL methanol solution, continue to stir 20min under the condition of 50 ℃, obtain homogeneous phase clear solution; Obtain homogeneous phase powder after homogeneous phase clear solution is dried, grind; Homogeneous phase powder is placed in quartz tube, Place the quartz tube in the uniform temperature zone of the tubular resistance furnace, raise the temperature to 500°C at a rate of 10°C / min in a nitrogen atmosphere with a flow rate of 0.2mL / min, and keep the temperature constant for 2 hours; then raise the temperature to 700°C, and keep the temperature for 2 hours. hour; after the reaction was finished, the quartz tube was cooled to room temperature in a nitrogen atmosphere to obtain a black powder;

[0033] (2) Put the black powder obtained in step (1) into a beaker, add 300mL of 0.5mol / L sulfuric acid so...

Embodiment 2

[0040] The preparation method of this embodiment is the same as that of Example 1, the only difference is that the water-soluble metal M 2+ Salt selection 1.670g (8.4mmol) ferrous chloride tetrahydrate (FeCl 2 4H 2 O) to replace cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), obtained nitrogen-doped carbon-coated iron nanoparticles magnetic composite material.

[0041] The mass of the composite material obtained in this example is ~1.6 g, and the doping rate of nitrogen is ~8%.

[0042] Figure 6 For the XRD diffraction pattern of the nitrogen-doped carbon-coated iron nanoparticle magnetic composite material prepared in this example, it can be seen from the figure that the diffraction peak corresponding to 26 ° is graphite carbon, and the remaining three diffraction peaks correspond to simple substance Iron; there are no other diffraction peaks in the spectrum, indicating that the composite material is of high purity without any impurities.

[0043] Figure 7 The XPS...

Embodiment 3

[0045] The preparation method of this embodiment is the same as that of Example 1, the only difference is that the water-soluble metal M 2+ Salt selection 1.997g (8.4mmol) nickel chloride hexahydrate (NiCl 2 ·6H 2 O) to replace cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) to prepare nitrogen-doped carbon-coated nickel nanoparticle magnetic composite material.

[0046] The mass of the composite material prepared in this embodiment is ~1.3g, and the doping rate of nitrogen is ~7%.

[0047] Figure 8 For the XRD diffraction pattern of the nitrogen-doped carbon-coated nickel nanoparticle magnetic composite material prepared in this example, it can be seen from the figure that the diffraction peak corresponding to 26 ° is graphite carbon, and the remaining three diffraction peaks correspond to simple substance Nickel; there are no other diffraction peaks in the spectrum, indicating that the composite material is of high purity without any impurities.

[0048] Figure 9 ...

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Abstract

The invention discloses a preparation method of a non-metallic element-doped carbon-coated metal nanoparticle magnetic composite material. Mixing and dissolving in methanol solution, drying and grinding, and the obtained homogeneous powder is calcined and pyrolyzed under the protection of inert gas; the pyrolysis product is then pickled, washed with water, dried and ground to obtain the target product. The entire preparation process of the present invention realizes the reduction of metal ions, the coating of metal nanoparticles, and the doping of non-metallic elements such as nitrogen / boron / sulfur in one step; the composite material prepared by the method of the present invention has a high degree of graphitization, and The method has the advantages of good dispersion and high purity, and the preparation method has the advantages of low cost, simple process, easy realization of large-scale synthesis and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis and application of carbon nanomaterials, and in particular relates to a preparation method of a nonmetallic element-doped carbon-coated metal nanoparticle magnetic composite material. Background technique [0002] Magnetic metal nanoparticles show great application prospects in ultra-high density information storage, catalysis, giant magnetoresistance, magneto-optic materials, and biomedicine. However, metal nanoparticles have high reactivity and are easy to oxidize and agglomerate in the air. Some metals are toxic and mix with aqueous solutions to cause water pollution. Therefore, how to obtain stable magnetic metal nanoparticles has become a research hotspot. Carbon-coated magnetic metal nanoparticle materials, because the nano-metal particles are at the core of the coating structure, are imprisoned in a small space by the carbon shell, thereby avoiding the influence of the environment on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/30B22F9/24
CPCB22F9/24B22F9/30B22F1/16
Inventor 姚运金陈浩连超魏凤玉张大伟吴国东
Owner 合肥庐阳科技创新集团有限公司
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