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Preparation method of nano-carbon material

A nano-carbon material and carbon source technology, applied in nano-carbon, nanotechnology, nanotechnology and other directions, can solve the problems of difficult product quality control, hinder industrial application, difficult to disperse, etc., to keep the furnace wall clean and prevent direct contact , to avoid the effect of curling and winding

Active Publication Date: 2015-03-25
赛福纳米科技(徐州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the CVD method, the output, quality, and microstructure of carbon nanotubes are affected by the reaction temperature, the direction of material movement, and the reaction atmosphere. Industrial application

Method used

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  • Preparation method of nano-carbon material
  • Preparation method of nano-carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mix manganocene and benzene according to the molar ratio of 4:1, and prepare a benzene solution of manganocene under the protection of an inert gas. The above solution is sprayed into the synthesis chamber with air curtain protection at a flow rate of 100mL / min through the injection feeding system. In the furnace, control the upper, middle and lower temperature zones in the furnace, the temperatures are 500, 900, and 400°C respectively, the upper protective gas of the synthesis furnace is hydrogen with a flow rate of 30ml / min, and the lower protective gas is nitrogen with a flow rate of 40ml / min. In the upper temperature zone, manganese is reduced to elemental manganese, and in the middle temperature zone, carbon nanotubes grow on the surface of manganese metal atoms. In the lower temperature zone, the active manganese metal is immediately polluted and the catalytic activity is lost, and the carbon nanotubes stop growing. maintained at nanoscale lengths. The metal nan...

Embodiment 2

[0040] Mix ferrocene and benzene at a molar ratio of 3:1, and prepare a ferrocene-benzene solution under the protection of an inert gas. The above solution is injected into the synthesis chamber with air curtain protection at a flow rate of 100mL / min through the injection feeding system. In the furnace, control the upper, middle and lower temperature zones in the furnace, the temperatures are 500, 900, and 400°C respectively, the upper protective gas of the synthesis furnace is hydrogen with a flow rate of 30ml / min, and the lower protective gas is nitrogen with a flow rate of 40ml / min. In the upper temperature zone, ferrocene is reduced to simple iron, and in the middle temperature zone, carbon nanotubes grow on the surface of iron metal atoms. In the lower temperature zone, the active iron metal is immediately polluted and the catalytic activity is lost, and the carbon nanotubes stop growing. maintained at nanoscale lengths. The metal nanocarbon material is cooled to room t...

Embodiment 3

[0044] Mix ferrocene and benzene according to the molar ratio of 1:1, and prepare a benzene solution of ferrocene under the protection of inert gas. The above solution is sprayed into the synthesis chamber with air curtain protection at a flow rate of 100mL / min through the injection feeding system. In the furnace, control the upper, middle and lower temperature zones in the furnace, the temperatures are 500, 900, and 400°C respectively, the upper protective gas of the synthesis furnace is hydrogen with a flow rate of 30ml / min, and the lower protective gas is nitrogen with a flow rate of 40ml / min. In the upper temperature zone, ferrocene is reduced to simple iron, and in the middle temperature zone, carbon nanotubes grow on the surface of iron metal atoms. In the lower temperature zone, the active iron metal is immediately polluted and the catalytic activity is lost, and the carbon nanotubes stop growing. maintained at nanoscale lengths. The metal nano-carbon material is cool...

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Abstract

The invention discloses a preparation method of a nano-carbon material. The preparation method is characterized by performing chemical vapor deposition synthesis through a synthetic furnace, wherein the synthetic furnace comprises a furnace body capable of realizing temperature in divided zones, the furnace body is provided with an annulus wall protective gas injection system. According to the preparation method of the nano-carbon material, the protective gas forms a protective gas curtain in the furnace; the gas curtain is able to provide an uniform protective atmosphere and heat required in material reaction, control the material to move in parallel with a furnace tube, prevent a carbon tube from growing along different directions and avoid curling and winding of the carbon tube, and also can prevent the material from coming into direct contact with the wall of the furnace, thus avoiding occurrence of side reaction and keeping the furnace wall clean.

Description

technical field [0001] The invention relates to a method for preparing nano-carbon materials, in particular to a synthesis furnace using a partitionable temperature-controlled furnace body with a ring-wall protection gas injection system in the reaction process, and under the protection of the ring-wall protection gas curtain, chemical gas phase is carried out. Deposition and synthesis of carbon nanomaterials. Background technique [0002] Since the Japanese scientist Lijima discovered carbon nanotubes in the cathode deposits of fullerenes produced by the direct current arc method in 1991, the research on them has become one of the most cutting-edge hot fields in physics, chemistry and material science. Carbon nanotube is a new type of carbon structure. It is a hollow carbon fiber. The tube wall is formed by curling one or several layers of graphene. The distance between each layer and the layer is about 0.34nm. nanometers, and the tube length can reach tens to several m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/15
Inventor 屈瑶高玉忠董明
Owner 赛福纳米科技(徐州)有限公司
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