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A method for preparing carbon nanotubes with basalt fiber as catalyst

A technology of basalt fibers and carbon nanotubes, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of high cost of carbon nanotube catalysts

Active Publication Date: 2016-08-24
SHANDONG DAZHAN NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the chemical composition of basalt fibers, it contains the metal active components that catalyze the growth of carbon nanotubes. If basalt fibers can be used as carbon nanotube catalysts, it can not only broaden the application field of basalt fibers, but also solve the problem of high cost of carbon nanotube catalysts. question

Method used

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  • A method for preparing carbon nanotubes with basalt fiber as catalyst
  • A method for preparing carbon nanotubes with basalt fiber as catalyst
  • A method for preparing carbon nanotubes with basalt fiber as catalyst

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Experimental program
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Effect test

Embodiment 1

[0046] Cut 2g of basalt fiber into thin slices of 0.3cm long and 0.1cm wide and put them in a muffle furnace for calcination at 700°C for 2h; put the treated basalt flakes into a fluidized bed reactor, blow nitrogen gas for 30min, and raise the temperature of the reactor To 700°C, feed hydrogen for reduction for 15 minutes, the flow rate of hydrogen is 0.1m / s; after the reduction is completed, feed the mixed gas of propylene and nitrogen into the reactor, the flow rate of the mixed gas is 0.5m / s, and the gas flow blows the catalyst into In the fluidized state, propylene adheres to the surface of the catalyst and gradually cracks to generate carbon nanotubes. After the reaction is completed, the material is cooled and discharged.

[0047] Calculated by weighing, the purity of carbon nanotubes is 62.8%. figure 1 It can be seen that the resulting product is indeed a carbon nanotube with a diameter of about 30nm.

Embodiment 2

[0049]Cut 2g of basalt fiber into thin slices of 0.5cm in length and 0.2cm in width and put them in a muffle furnace for calcination at 900°C for 4h; put the treated basalt flakes into a fluidized bed reactor, blow in nitrogen for 50min, and raise the temperature of the reactor To 800°C, pass in hydrogen for 20 minutes for reduction, the flow rate of hydrogen is 0.2m / s; after the reduction is completed, pass a mixed gas of methane and nitrogen into the reactor, the flow rate of the mixed gas is 0.3m / s, and the gas flow blows the catalyst into In the fluidized state, methane adheres to the surface of the catalyst and gradually cracks to generate carbon nanotubes. After the reaction is completed, the material is cooled and discharged. Calculated by weighing, the purity of carbon nanotubes is 77.3%.

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Abstract

The invention discloses a method for preparing carbon nanotubes, in particular to a method for preparing carbon nanotubes using basalt fiber as a catalyst. The carbon nanotubes are prepared by cutting the basalt fibers into small slices, calcining them at high temperature, putting them into a fluidized bed reactor, using low carbon olefins as carbon sources, and using chemical vapor deposition. The method is low in cost, simple in process and easy to operate, not only broadens the application field of basalt fiber, but also can solve the problem of high cost of carbon nanotube catalyst, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotubes, in particular to a method for preparing carbon nanotubes using basalt fiber as a catalyst. Background technique [0002] Carbon nanotubes have been attracting the attention of researchers at home and abroad for their unique structure and excellent performance since their appearance. Carbon nanotubes have good mechanical properties, thermal stability, special electrical properties, thermal conductivity, hydrogen storage, adsorption and catalytic properties, etc. At present, the most common preparation method is the chemical vapor deposition method, in which the active components of the catalyst used are mainly metal Fe, Co, Ni, Mg, Al or their alloys. In recent years, Cu, Mo, Sn, etc. have also been introduced into the catalyst group. Different catalysts with different active components and structures will affect the morphology, structure, yield and performance of the grown carbon nanotu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y40/00B82Y30/00
Inventor 李岩徐泗蛟房泽芳
Owner SHANDONG DAZHAN NANO MATERIALS