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Method for preparing nano carbon tube

A carbon nanotube and catalyst technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve problems such as toxicity, explosiveness, and high price

Inactive Publication Date: 2007-11-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most gaseous raw materials are flammable, explosive or toxic, and some liquid raw materials also have disadvantages such as high prices, people have always paid attention to finding safe and cheap raw materials to prepare carbon nanotubes.
[0004] The present invention adopts mesoporous molecular sieve containing transition metal as catalyst and template agent, and the method for preparing carbon nanotubes with ethanol as carbon source CVD method has not been reported at present

Method used

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  • Method for preparing nano carbon tube
  • Method for preparing nano carbon tube

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Experimental program
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Effect test

Embodiment 1

[0016] Take the mesoporous molecular sieve catalyst powder loaded with iron and spread a thin layer (about 2mm) on the constant temperature part of the tube furnace for heating, and pass in nitrogen for protection. Raise the temperature to 700°C at a rate of 1 / min, pass the nitrogen gas through the three-way pipe through the ethanol container heated to 80°C, let the nitrogen gas with ethanol vapor pass through the tube furnace, and keep the temperature at 700°C for 30 minutes, then stop feeding the ethanol vapor nitrogen, and then lowered to room temperature under the protection of nitrogen to obtain the crude product of carbon nanotubes. The crude product of carbon nanotubes was placed in a 40% by mass HF solution, and ultrasonically treated for 1.5 hours to obtain a carbon nanotube sample. The transmission electron microscope image of the prepared carbon nanotubes is shown in Figure 1. It can be seen from Figure 1 that the prepared carbon nanotubes have a relatively uniform ...

Embodiment 2

[0018] Take the mesoporous molecular sieve catalyst powder loaded with nickel and spread a thin layer (about 4mm) on the constant temperature position of the tube furnace for heating, and feed nitrogen for protection, and the nitrogen flow rate is 60ml / min. Use a temperature program controller to raise the temperature to 800°C at a rate of 10°C / min, pass the nitrogen through the three-way pipe through the ethanol container heated to 70°C, let the nitrogen entrained with ethanol vapor pass through the tube furnace, and keep the temperature at 800°C for 20 minutes Afterwards, the feeding of nitrogen entraining ethanol vapor was stopped, and then the mixture was lowered to room temperature under the protection of nitrogen to obtain a crude product of carbon nanotubes. The crude carbon nanotube product was placed in a 30% by mass HF solution, and subjected to ultrasonic treatment for 1.5 hours to obtain a carbon nanotube sample. The transmission electron microscope image of the pr...

Embodiment 3

[0020] Using cobalt-supported mesoporous molecular sieve as a catalyst to prepare carbon nanotubes according to a method similar to Example 1, the results similar to Example 1 were obtained.

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Abstract

It is a kind of method of preparing nanophase cabon tube, which relates to technological field of preparation of nanophase material. Tile the activator power which is either a kind of meso-porous molecular sieve containing iron,cobalt or nickel or a kind of meso-porous molecular sieve loading iron, cobalt or nickel into a thin layer at the position of constant temperature in the heat-proof container and then heat the power, fill nitrogen whose flux is 40-100 ml / min, to protect it. when the temperature of heat-proof container is up to 600-800 degree C, get nitrogen across container of ethanol and the temperature of the container is 60-90 degree C,get nitrogen mixed with ethanol steam across the heat-proof container where there is activator power, after keeping the temperature of 600-800 degree C constant for 15-60min,stop entering nitrogen mixed with ethanol steam and reduce it to room temperature under protection of nitrogen, thus, we will get coarse product of nanophase cabon tube, then set it into HF solution whose mass percent is 30-40%, and then deal it with ultrasonic for 1-1.5h and get muster of nanophase cabon tube. Raw material used in the invention is ethanol, the cost is cheap and it is convenient to use, overcoming the defects that the operation of compounding nanophase cabon tube using gas material is complex and the cost of raw material is high.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, in particular to a mesoporous molecular sieve containing iron, cobalt or nickel or a mesoporous molecular sieve loaded with iron, cobalt or nickel, and using ethanol as a carbon source to prepare carbon nanotubes by chemical vapor deposition method. Background technique [0002] Since Iijima published the discovery of carbon nanotubes in Nature 354, pages 56-58 in 1991, due to their unique structure and excellent mechanical, electrical, chemical and electromagnetic properties, they have attracted extensive attention from scholars from all over the world. At present, there are many methods for preparing carbon nanotubes, including graphite arc method, catalytic cracking method (CVD method), laser evaporation method, pyrolysis polymer method, ion radiation method and flame method, etc. Nevertheless, the research on the synthesis method of carbon nanotubes has always been a hot...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00
Inventor 姜廷顺赵谦李萌殷恒波王建军顾林
Owner JIANGSU UNIV