Method for preparing minor-diameter carbon nanotube array on surface of flaky material

A carbon nanotube array and sheet material technology, which is applied in the field of new materials and their preparation, can solve the problem of carbon nanotube diameter control strategy not being strictly controlled, and achieves the effects of easy industrial scale-up, simple operation, and easy serialization.

Active Publication Date: 2010-03-10
TSINGHUA UNIV
View PDF13 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface growth of sheet-like materials is not involved, and the diameter control strategy of carbon nanotubes in the array is not strictly controlled.

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
  • Method for preparing minor-diameter carbon nanotube array on surface of flaky material
  • Method for preparing minor-diameter carbon nanotube array on surface of flaky material
  • Method for preparing minor-diameter carbon nanotube array on surface of flaky material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Preparation of small-diameter carbon nanotube arrays in a fixed bed of FeMgAl layered double hydroxyl metal oxides

[0032] 20mgFe content was 10%, CO 3 2- Anionic FeMgAl layered double hydroxy metal oxides are used as catalysts in a fixed-bed reactor, and a mixed gas of hydrogen and argon is introduced to reduce the catalyst at a temperature of 600 ° C with a reduction space velocity of 1 hr -1 , the volume ratio of hydrogen to carrier gas is 1:10; the average particle size of metal particles after reduction is 5nm, and the density is about 10 10 grain / cm 2 . The temperature of the reactor was raised to 750°C, and a mixed gas of ethylene, hydrogen and argon was introduced, wherein the volume ratio of hydrogen: ethylene: argon was 0.1:1:10, and the space velocity of the reaction process was 2000hr -1 , the gas velocity is 0.5m / s. After 30 minutes, the hydrogen and carbon source ethylene were turned off, the reactor was cooled to room temperature under an...

Embodiment 2

[0033] Example 2: Preparation of small-diameter carbon nanotube arrays in a CoMgAl layered double hydroxy metal oxide fluidized bed

[0034] With 0.5g Co content as 20%, CO 3 2- The anionic CoMgAl layered double hydroxy metal oxide is used as a catalyst in a fluidized bed reactor, and a mixed gas of hydrogen and argon is introduced to reduce the catalyst at a temperature of 700 ° C with a reduction space velocity of 2 hr -1 , the volume ratio of hydrogen to carrier gas is 1:0.1; the average particle size of metal particles after reduction is 7nm, and the density is about 10 11 grain / cm 2 . The temperature of the reactor is raised to 650°C, and a mixed gas of propylene, hydrogen and argon is introduced, wherein the volume ratio of hydrogen: propylene: argon is 0.1:1:0.1, and the space velocity of the reaction process is 5000hr -1 , the gas velocity is 0.05m / s. After 30 minutes, the hydrogen and carbon source propylene were turned off, the reactor was cooled to room tempera...

Embodiment 3

[0035] Example 3: Preparation of small-diameter carbon nanotube arrays in a fixed bed of CoAl layered double hydroxy metal oxides

[0036] 0.5g Co content 30% CO 3 2- The anionic CoAl layered double hydroxy metal oxide is used as a catalyst in a fixed-bed reactor, and a mixed gas of hydrogen and nitrogen is introduced to reduce the catalyst at a temperature of 600 ° C, and the reduction space velocity is 0.2 hr -1 , the volume ratio of hydrogen to carrier gas is 1:20; the average particle size of metal particles after reduction is 15nm, and the density is about 10 8 grain / cm 2 . The temperature of the reactor is raised to 650°C, and a mixed gas of ethanol, hydrogen and nitrogen is introduced, wherein the volume ratio of hydrogen: ethanol: nitrogen is 1:1:10, and the space velocity of the reaction process is 100hr -1, the gas velocity is 0.5m / s. After 30 minutes, the hydrogen and carbon source ethanol were turned off, the reactor was cooled to room temperature under nitrog...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing a minor-diameter carbon nanotube array on the surface of a flaky material, which belongs to the technical fields of nanometer materials and the preparation process thereof. The method comprises the following steps: the nanoparticles including one or more of Fe, Co, Ni, Cu and Mo (active metals) are dispersed on various flaky materials such as a graphitic sheet, magnesia or layered double hydroxide according to the density (10<8>-10<12> grains/cm<2>), then the chemical vapor deposition is performed, and finally, the carbon nanotube array grows onthe flaky surface. The diameter of the nanotube is less than 20 nm in the array. The method is easy to operate, realizes the mass production of the carbon nanotube array and promotes the industrial application.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanotube array, in particular to a method for preparing a small-diameter carbon nanotube array on the surface of a sheet material, and belongs to the technical field of new materials and its preparation. Background technique [0002] The one-dimensional tubular structure of carbon nanotubes (CNTs) brings about excellent mechanical, electrical, thermal, optical, and acoustic properties. Its excellent performance and wide application have attracted great attention from scholars and engineers from all over the world. The intertwining of carbon nanotubes forms a certain cluster structure. If carbon nanotubes are intertwined disorderly, carbon nanotube clusters will be formed; if carbon nanotubes are ordered, carbon nanotube arrays will be formed (Wei Fei et al., New Carbon Materials, 2007, 22(3): 271-282 ). At present, carbon nanotubes have been applied in the fields of composite materials, lithiu...

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): C01B31/02
Inventor 魏飞张强赵梦强
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap