Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of carbon nanotubes

A technology of carbon nanotubes and carbon dioxide, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of incapable of scale and continuous production, achieve optimized chemical vapor deposition method, wide source of raw materials, graphitization The effect of increasing

Inactive Publication Date: 2018-10-12
NANJING ZHONGYING NEW NANOMATERIALS
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase pyrolysis method is a new method for pyrolyzing conventional carbon-containing metastable solids to grow carbon nanotubes at high temperatures. This method is relatively stable, does not require catalysts, and grows in situ, but is limited by raw materials. It cannot be scaled and continuous. It is not difficult to see from the above that there are more or less defects in the production of carbon nanotubes by a single method.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] A method for preparing carbon nanotubes, comprising the steps of:

[0023] Step a: Raw material preparation, take clean coal powder and place it in a high-temperature reaction furnace, extract the air in it to a vacuum state, input carbon dioxide gas into it, heat it to a high temperature, make the two react, and collect the reaction gas CO to a gas storage tank;

[0024] Step b: Take a clean quartz glass tube, put it into a metal catalyst, and fill it with an inert gas such as nitrogen;

[0025] Step c: setting a heating and generating metal end above the quartz glass tube in step b, and extending into the quartz glass tube;

[0026] Step d: mix the CO gas obtained in step a with a certain amount of nitrogen gas, and input it into the quartz glass pipe in step c through the gas guide tube, and flow it over the upper surface of the metal catalyst;

[0027] Step e: Next, in step c, the heat generating metal port transmits heat to the glass quartz tube to 450°C, and at t...

example 2

[0036] A method for preparing carbon nanotubes, comprising the steps of:

[0037] Step a: Raw material preparation, take clean coal powder and place it in a high-temperature reaction furnace, extract the air in it to a vacuum state, input carbon dioxide gas into it, heat it to a high temperature, make the two react, and collect the reaction gas CO to a gas storage tank;

[0038] Step b: Take a clean quartz glass tube, put it into a metal catalyst, and fill it with an inert gas such as nitrogen;

[0039] Step c: setting a heating and generating metal end above the quartz glass tube in step b, and extending into the quartz glass tube;

[0040] Step d: mix the CO gas obtained in step a with a certain amount of nitrogen gas, and input it into the quartz glass pipe in step c through the gas guide tube, and flow it over the upper surface of the metal catalyst;

[0041] Step e: Next, in step c, the heat generating metal port transmits heat to the glass quartz tube to 520°C, and at t...

example 3

[0050] A method for preparing carbon nanotubes, comprising the steps of:

[0051] Step a: Raw material preparation, take clean coal powder and place it in a high-temperature reaction furnace, extract the air in it to a vacuum state, input carbon dioxide gas into it, heat it to a high temperature, make the two react, and collect the reaction gas CO to a gas storage tank;

[0052] Step b: Take a clean quartz glass tube, put it into a metal catalyst, and fill it with an inert gas such as nitrogen;

[0053] Step c: setting a heating and generating metal end above the quartz glass tube in step b, and extending into the quartz glass tube;

[0054] Step d: mix the CO gas obtained in step a with a certain amount of nitrogen gas, and input it into the quartz glass pipe in step c through the gas guide tube, and flow it over the upper surface of the metal catalyst;

[0055] Step e: Next, in step c, the heat generation metal port transmits heat to the glass quartz tube to 600°C, and at t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of carbon nanotubes. The preparation method comprises the following steps: preparing raw materials, cracking organic oxide CO on a metal catalyst to prepare the carbon nanotubes, and collecting and storing the carbon nanotubes. Common carbon dioxide is used as the raw material to prepare the CO and the CO is used for preparing the carbon nanotubes; theraw materials have a wide source, the price is low and industrial production is easy to realize; heat generated in a carbon dioxide production process can be further applied to the production of thenext step, so that wastes of energy sources are reduced; carbon dioxide also can be obtained by collecting air or industrial waste gas and the effect of protecting the environment is realized; meanwhile, when the carbon nanotubes are prepared, electric arc is matched with organic gas (CO) cracking and a chemical vapor deposition method is optimized, so that the graphitization degree of the obtained carbon nanotubes is improved and is more regular; in a preparation process, a quartz glass tube is obliquely arranged and a metal catalyst moves slowly through adjusting an angle; non-single-point preparation of the carbon nanotubes is realized.

Description

technical field [0001] The invention belongs to the technical field of chemical material preparation, and in particular relates to a method for preparing carbon nanotubes. Background technique [0002] As a one-dimensional nanomaterial, carbon nanotubes are light in weight, perfectly connected in a hexagonal structure, and have many abnormal mechanical, electrical and chemical properties. In recent years, with the deepening of research on carbon nanotubes and nanomaterials, their broad application prospects show up constantly. [0003] Commonly used carbon nanotube preparation methods mainly include: arc discharge method, laser ablation method, chemical vapor deposition method (hydrocarbon gas pyrolysis method), solid phase pyrolysis method, glow discharge method, gas combustion method and polymerization synthesis. law etc. The arc discharge method is the main method for producing carbon nanotubes, but the method consumes too much energy; the chemical vapor deposition meth...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/162
CPCC01B32/162
Inventor 苏利群
Owner NANJING ZHONGYING NEW NANOMATERIALS