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Nano carbon tube cluster power and preparation

A carbon nanotube and cluster technology, applied in the field of materials, can solve the problems of low preparation efficiency, low preparation efficiency and high preparation cost, and achieve the effects of thin tube wall, uniform diameter and large inner diameter

Inactive Publication Date: 2009-04-22
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing dispersed carbon nanotubes, the preparation efficiency is very low
In addition, the preparation of aligned carbon nanotubes has always been one of the research hotspots, but its preparation often uses a large substrate, the process is complicated, and the preparation efficiency is not high
It is mainly prepared by the sputtering method to prepare the catalyst thin film, and then prepared by the method of vapor phase deposition, and its preparation cost is high

Method used

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  • Nano carbon tube cluster power and preparation
  • Nano carbon tube cluster power and preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare 0.5mol / l Fe(NO 3 ) 3 Aqueous solution, measure 10ml and mix with 15g of SiO 2 Mix the powder evenly, bake in a muffle furnace at 500°C for 60 minutes, and use it as a catalyst after grinding.

[0019] The furnace was heated to 900°C and filled with N 2 emptying. Put the catalyst in the quartz boat and push it into the reaction zone. When the temperature reaches 900°C again and maintain a constant temperature, the flow rate is 100cm 3 / min, 300cm 3 / min, 40cm 3 N / min 2 , NH 3 and C 2 h 2 of the gas mixture. After holding for 10 minutes, at N 2 Take it out after cooling to room temperature under the protection of the hood, and obtain a carbon nanotube cluster powder with microscopic orientation.

Embodiment 2

[0021] Prepare 1.2mol / l Co(NO 3 ) 2 Aqueous solution, measure 10ml and mix with 15g of Si powder evenly, bake in muffle furnace at 800°C for 10 minutes, grind and use as catalyst.

[0022] The furnace was heated to 800°C and filled with N 2 emptying. Put the catalyst in the quartz boat, push it into the reaction zone, wait for the temperature to reach 800°C again and keep it at a constant temperature, the flow rate is 50cm 3 / min, 100cm 3 / min, 20cm 3 N / min 2 , NH 3 and C 2 h 2 of the gas mixture. After holding for 60 minutes, at N 2 Take it out after cooling to room temperature under the protection of the hood, and obtain a carbon nanotube cluster powder with microscopic orientation.

Embodiment 3

[0024] Prepare 3mol / l Ni(NO 3 ) 2 Aqueous solution, measure 10ml and mix with 15g of Al 2 o 3 Mix the powder evenly, bake in a muffle furnace at 600°C for 40 minutes, and use it as a catalyst after grinding.

[0025] The furnace was heated to 700°C and filled with N 2 emptying. Put the catalyst in the quartz boat, push it into the reaction zone, wait for the temperature to reach 700°C again and keep it at a constant temperature, the flow rate is 200cm 3 / min, 500cm 3 / min、60cm 3 N / min 2 , NH 3 and C 2 h 2 of the gas mixture. After holding for 120 minutes, at N 2 Take it out after cooling to room temperature under the protection of the hood, and obtain a carbon nanotube cluster powder with microscopic orientation.

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Abstract

The invention relates to carbon nano-tube cluster powder and a preparation method thereof. The prior method has trivial process and low preparation efficiency. The powder consists of unordered and scattered carbon nano-tube clusters, wherein each carbon nano-tube cluster comprises a micron flaky substrate; the growth directions of carbon nano-tubes on both surfaces of the substrate are the same and are basically perpendicular to a plane of the substrate; and gaps are reserved between adjacent carbon nano-tubes. The preparation method comprises the following steps: firstly, substrate materials are mixed with a catalyst, namely a salpeter solution to obtain a substrate block; secondly, the substrate block is ground to obtain scattered flaky substrate powder containing a catalyst film; and thirdly, the flaky substrate powder is arranged inside a quartz tube, heated to the temperature of between 700 and 900 DEG C, added with N2, NH3 and C2H2, maintained for 10 to 120 minutes, cooled and taken out. The powder has the advantages of macrographic disorder property, microcosmic directive property, large and uniform diameter, thin tube wall and large inside diameter, and is suitable to be a catalyst and a vector of other substances.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a carbon nanotube cluster powder and a preparation method thereof. The material is an aggregate composed of carbon nanotube clusters with orientation characteristics at the micron level. The carbon nanotube powder has important use value as electrode material and catalyst carrier material. Background technique [0002] Carbon nanotubes are a new material discovered in the 1990s. They are typical representatives of one-dimensional structural materials and nanomaterials. Carbon nanotubes are of great value in electrode materials and catalyst carrier materials. At present, a method for efficiently preparing carbon nanotubes has been reported, but the carbon nanotubes prepared by this method grow in bundles, and the carbon nanotubes are tightly combined, and it is difficult for other substances, even water, to enter between the carbon nanotube bundles. Therefore, these carbon nanotu...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 徐军明黄海云郑梁胡晓萍宋开新
Owner HANGZHOU DIANZI UNIV
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