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

A kind of carbon nanotube purified by rotating binary gas phase method and its purification method

A carbon nanotube, gas phase method, applied in the direction of carbon nanotubes, multi-walled carbon nanotubes, single-walled carbon nanotubes, etc., can solve problems such as high energy consumption and pollution

Active Publication Date: 2021-03-16
成都莱尔纳米科技有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high energy consumption and serious pollution of traditional strong acid washing, high-temperature gasification and chlorine gas purification of carbon nanotubes, the present invention proposes a rotary binary gas-phase method for purifying carbon with simple operation, low energy consumption, low pollution and easy engineering. Method for nanotubes and carbon nanotubes obtained after purification by the 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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of carbon nanotube purified by rotating binary gas phase method and its purification method
  • A kind of carbon nanotube purified by rotating binary gas phase method and its purification method
  • A kind of carbon nanotube purified by rotating binary gas phase method and its purification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The device for purifying carbon nanotubes in this embodiment is shown in figure 1 , figure 2 and image 3 shown.

[0045] 100g iron-based catalyst (carrier is SiO 2 ) synthesized multi-walled carbon nanotubes (labeled as example 1), put into spiral furnace tube 1 through feed valve 7, close discharge valve 6, open exhaust valve 5, then heat up to 315 °C, and rotate furnace tube , after 0.5 hours of dry compressed air, change the compressed air to nitrogen to replace the air atmosphere in the tube type. When the oxygen content is lower than 1%, close the exhaust valve 5 and the feed valve 7, and then raise the temperature to 400 ℃, open the material opening valve 6 and rotate the stirring plate rotary furnace tube 2, put the one-dimensional carbon nanotubes in the spiral furnace tube 1 into the stirring plate rotary furnace tube 2, and open the hydrogen chloride inlet valve 11 to feed hydrogen chloride Gas reaction 0.5h. After the reaction, stop feeding hydrogen ch...

Embodiment 2

[0048] The device for purifying carbon nanotubes in this embodiment is shown in figure 1 , figure 2 and image 3 shown.

[0049] With 80g nickel base catalyst (carrier is SiO 2 ) (Ni) synthesized multi-walled carbon nanotubes (labeled as example 2) are loaded into the rotary spiral furnace furnace tube 1 through the feed valve 7, the discharge valve 6 is closed, the exhaust valve 5 is opened, and the temperature is then raised to 315 ° C. Rotate the furnace tube, pass dry compressed air into it for 0.5 hours, change the compressed air to nitrogen, and replace the air atmosphere in the tube type. When the oxygen content is lower than 1%, close the exhaust valve 5 and the feed valve 7, and then adjust the temperature Raise to 1000°C, open the material opening valve 6 and rotate the stirring plate rotary furnace tube 2, put the monolithic carbon nanotubes in the spiral furnace tube 1 into the stirring plate rotary furnace tube 2, and open the hydrogen chloride inlet valve 11 ...

Embodiment 3

[0052] The device for purifying carbon nanotubes in this embodiment is shown in figure 1 , figure 2 and image 3 shown.

[0053] With 12g cobalt-based catalyst (the carrier is SiO 2 ) synthesized multi-walled carbon nanotubes (labeled as example 3), put into the rotary furnace spiral furnace tube 1 through the feed valve 7, close the discharge valve 6, open the exhaust valve 5, then heat up to 315 ° C, rotate After passing through the furnace tube with dry compressed air for 0.5 hours, change the compressed air to nitrogen to replace the air atmosphere in the tube type. When the oxygen content is lower than 1%, close the exhaust valve 5 and the feed valve 7, and then the temperature rises to At 1100°C, open the material opening valve 6 and stir plate rotary furnace tube 2, put the monolithic carbon nanotubes in the spiral furnace tube 1 into the stir plate rotary furnace tube 2, and open the hydrogen chloride inlet valve 11 to feed Hydrogen chloride gas reaction 0.5h. St...

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

PropertyMeasurementUnit
boiling pointaaaaaaaaaa
boiling pointaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of carbon nanotube purification, and particularly relates to a carbon nanotube purified by a rotary binary gas phase method and a purification method. According to the invention, carbon nano tubes are subjected to oxygen enrichment and a certain temperature condition for converting the residual catalyst metal in the carbon nano tubes into metal oxide; the strong oxidizing property of hydrogen chloride gas is utilized; firstly, residual metal catalysts in the carbon nano tubes react under the heating condition to generate chlorides and water, then the characteristic that the gasification temperature of the metal chlorides is far lower than the gasification temperature of the metals and the oxides of the metals is utilized, the metal chlorides aregasified and separated from the carbon nanotubes through heating, and therefore the purpose of purifying the carbon nanotubes is achieved. The method disclosed by the invention is simple, easy to amplify in productivity, small in pollution, easy to engineer, good in purification effect and suitable for removing various residual metals in various carbon nanotubes. The purity of the carbon nanotubes is high, and the content of single metal impurities in the carbon nanotubes is less than 20 ppm.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube purification, and in particular relates to a carbon nanotube purified by a rotating two-dimensional gas phase method and a purification method. Background technique [0002] Carbon nanotubes are a new type of material that attracts worldwide attention. They have super large specific surface area, light weight but super strong mechanical strength, excellent electrical conductivity, and good physical and chemical stability. They are used as conductive agents in lithium-ion batteries, Catalyst carriers, drug carriers, reinforced blend materials, electronic devices and other fields have broad application prospects. [0003] At present, carbon nanotubes can be mass-produced at low cost by chemical vapor deposition (CVD). However, catalyst metals (mainly Fe-based, Ni-based, and Co-based, etc.) used in the CVD method remain in the carbon nanotubes, and many of them are coated on the ends of the ...

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 Patents(China)
IPC IPC(8): C01B32/17C01B32/159
CPCC01B2202/02C01B2202/04C01B2202/06C01B2202/30C01B32/159C01B32/17
Inventor 岳凡钦唐瑞
Owner 成都莱尔纳米科技有限公司