Method for preparing iron coated multi-layer graphene nano composite material by performing gaseous decomposition on pentacarbonyl iron

A technology of nanocomposite materials and multilayer graphene, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of high saturation magnetization, unfavorable popularization and application, serious agglomeration, etc., and achieve strong magnetic performance and application Wide range of effects with low preparation cost

Inactive Publication Date: 2013-01-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a material with low density and high saturation magnetization, Fe nanoparticles are very active, easy to spontaneously ignite in the air, and have serious agglomeration, which is not conducive to its popularization and application.

Method used

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  • Method for preparing iron coated multi-layer graphene nano composite material by performing gaseous decomposition on pentacarbonyl iron
  • Method for preparing iron coated multi-layer graphene nano composite material by performing gaseous decomposition on pentacarbonyl iron
  • Method for preparing iron coated multi-layer graphene nano composite material by performing gaseous decomposition on pentacarbonyl iron

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Take 20 mg of graphite oxide and put it in a crucible, wrap it with tin foil paper, push it into a tube furnace at 300 ° C for 3 minutes of thermal expansion treatment, put 1000 mg of the obtained multi-layer graphene into a four-necked flask, and connect the four-necked flasks to Condenser, temperature controller, mechanical stirrer, air inlet pipe. Nitrogen was introduced for 10 minutes to remove the air, and at a stirring speed of 180 r / min, the four-neck flask was slowly heated to 220° C. with an electric heating mantle for condensation and reflux. Continue with N 2 As a guide gas, guide iron pentacarbonyl vapor into a four-necked flask for thermal decomposition, N 2 The flow rate was 120ml / min, and the reaction lasted 60min. in N 2 Gradually lowered to room temperature under protection, and the obtained light-weight sample was the carbonyl-iron-iron-coated multilayer graphene nanocomposite.

[0031] figure 1 and 2 High-magnification and low-magnification sca...

Embodiment 2

[0036] Take 20 mg of graphite oxide and put it in a crucible, wrap it with tin foil paper, push it into a tube furnace at 500 ° C for 5 minutes of thermal expansion treatment, and obtain multi-layer graphene. Put 1000 mg of multi-layer graphene into a four-necked flask. The flask is connected with a condenser tube, a temperature controller, a mechanical stirrer and an air inlet tube respectively. Nitrogen (N 2 ) for 10 minutes, and under the condition of a stirring speed of 180r / min, use an electric heating mantle to slowly heat the four-neck flask to 240°C for condensation and reflux. Use N 2 As a guide gas, guide carbonyl iron vapor into the four-necked flask for decomposition, N 2 The flow rate was 120ml / min, and the reaction lasted 180min. in N 2 Gradually lower to room temperature under protection. The obtained sample is the iron-coated multilayer graphene nanocomposite material.

[0037] Figure 4 It is a transmission electron microscope image of the iron-coated g...

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Abstract

The invention discloses a method for preparing an iron coated multi-layer graphene nano composite material by performing gaseous decomposition on pentacarbonyl iron. The method comprises the following steps of: 1) performing thermal expansion peeling on graphite oxide which is prepared by Hummers at high temperature to obtain multi-layer graphene; 2) putting a certain amount of multi-layer graphene in a reaction container, introducing protective gas for a certain period of time to discharge air in a flask out, and controlling an electric jacket to slowly heat a four-mouth flask to 200 to 250 DEG C; 3) in the continuous mechanical stirring and refluxing process, introducing pentacarbonyl iron steam into the reaction container at the protective atmosphere, and performing thermal decomposition and refluxing for a certain period of time, wherein the thermal decomposition temperature is 200 to 250 DEG C; and 4) after reaction, cooling to room temperature under the protection of gas to obtain the iron coated multi-layer graphene nano composite material. The process is simple and controllable, the price is low, and the industrial large-scale product is convenient to realize.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and in particular relates to a method for preparing iron-coated multilayer graphene nanocomposite materials by decomposing iron pentacarbonyl in gas phase. Background technique [0002] In recent years, carbon nanomaterials (such as carbon nanotubes with two-dimensional structure and graphene with one-dimensional planar structure) have attracted extensive attention due to their physical and chemical properties. In order to take advantage of the advantages of carbon nanomaterials and expand their application range, scientists from various countries have turned their research targets to carbon nanocomposites. The rise of carbon nanotubes and carbon fibers is earlier, so there are many preparations and researches on the composite materials of the two. Yang et al. (Journal of Magnetism and Magnetic Materials 2003, No. 56, p. 129) loaded magnetic nano-Fe particles on carbon fibers by electroche...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00C01B32/192C01B32/194
Inventor 张豹山黄琪惠
Owner NANJING UNIV
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