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Method for preparing carbon nano-tubes by using biological product as catalyst precursor

A biological product, carbon nanotube technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing and other directions, can solve the problems of high cost, complex preparation process, large consumption of chemical reagents, etc., achieve low cost, simple preparation process, The effect of high safety

Inactive Publication Date: 2010-11-24
SHANXI DATONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of complex preparation process of catalyst precursor used in the process of preparing carbon nanotubes in the prior art, consumption of a large amount of chemical reagents, and high cost, the present invention provides a catalyst precursor with biological products as catalyst precursors to prepare high-purity and high-yield carbon nanotube method

Method used

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  • Method for preparing carbon nano-tubes by using biological product as catalyst precursor
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  • Method for preparing carbon nano-tubes by using biological product as catalyst precursor

Examples

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Embodiment 1

[0014] Embodiment 1: Clean the black fungus, remove the moisture, grind after drying, the grinding time is 20 minutes, and obtain the catalyst precursor powder; put the powder into the chemical vapor deposition furnace, under the protection of argon The temperature was raised to 800°C within 4 hours, and then the mixed gas of argon and natural gas with a volume ratio of 10:1 was passed into the chemical vapor deposition furnace, and the flow rate of the gas was 160 ml / min. Cool to room temperature under the protection of argon to obtain a black powder; react the obtained black powder with a sulfuric acid solution with a hydrogen ion concentration of 2 mol / L for 40 minutes, and then wash it with distilled water to neutrality to obtain high-purity nano-carbon tubes, the resulting carbon nanotubes as figure 1 shown.

Embodiment 2

[0015] Example 2: Clean the black sesame, remove the moisture, grind after drying, the grinding time is 10 minutes, and obtain the catalyst precursor powder; put the powder into a chemical vapor deposition furnace, under the protection of argon The temperature was raised to 1100°C within 6 hours, and then the mixed gas of argon and natural gas with a volume ratio of 8:1 was passed into the chemical vapor deposition furnace, the gas flow rate was 100 ml / min, and the reaction was carried out at 1100°C for 30 minutes. Cool to room temperature under the protection of argon to obtain a black powder; react the obtained black powder with a nitric acid solution with a hydrogen ion concentration of 6 mol / liter for 20 minutes, and then wash it with distilled water to neutrality to obtain high-purity nano-carbon tubes, the resulting carbon nanotubes as figure 2 shown.

Embodiment 3

[0016] Example 3: Pig blood was cleaned, dehydrated, dried, and ground for 40 minutes to obtain catalyst precursor powder; the powder was put into a chemical vapor deposition furnace, and under the protection of argon The temperature was raised to 1000°C within 5 hours, and then the mixed gas of argon and natural gas with a volume ratio of 6:1 was passed into the chemical vapor deposition furnace, and the flow rate of the gas was 70 ml / min. Cool to room temperature under the protection of argon to obtain a black powder; react the obtained black powder with a hydrochloric acid solution with a hydrogen ion concentration of 3 mol / liter for 30 minutes, and then wash it with distilled water to neutrality to obtain high-purity nano-carbon tubes, the resulting carbon nanotubes as image 3 shown.

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Abstract

The invention relates to a method for preparing carbon nano-tubes by using a biological product as a catalyst precursor. The method comprises the following steps of: dewatering and drying the biological product, grinding the dried biological product for 10 to 40 minutes, putting the ground biological product into a chemical vapor deposition furnace, raising the temperature to 800 to 1,100 DEG C within 4 to 6 hours under the protection of argon, introducing the argon and natural gas into the chemical vapor deposition furnace in a volume ratio of 6-10:1, controlling the flow rates of the gases to be between 70 and 160 milliliters / minute, performing reaction for 30 to 60 minutes at the temperature of between 800 and 1,100 DEG C and cooling the reaction product to room temperature under the protection of the argon so as to obtain black powder; and reacting the black powder with acid solution of which the hydrogen ion concentration is between 2 and 6 mol / liter for 20 to 40 minutes and cleaning the reaction product with distilled water until the reaction product is neutral so as to obtain the carbon nano-tubes. The method can greatly reduce preparation cost, has high process safety and is an environmental-friendly, low-carbon and energy-saving production process; and the yield of and the purity of the prepared carbon nano-tubes are high.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotubes by using biological products as catalyst precursors. To be precise, carbon nanotubes are prepared by chemical vapor deposition using catalytic cracking of methane. Background technique [0002] Carbon nanotubes have excellent mechanical, electrical, optical and thermal properties, so they have broad application prospects in the fields of materials, electronics, machinery, chemicals and energy. The chemical vapor deposition (CVD) process uses hydrocarbon gas as a carbon source and high-temperature cracking under the action of transition metal elements such as Fe, Co, Ni and other catalysts to prepare carbon nanotubes. The CVD process is the most common method for preparing carbon nanotubes. This process has the advantages of simple operation process, suitable for large-scale production, and high yield. In the process of preparing carbon nanotubes by CVD process, the catalyst plays a very...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
CPCY02P20/10
Inventor 赵建国王海青解廷月王萍郭永冯锋屈文山李江
Owner SHANXI DATONG UNIV
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