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Flame method modified carbon nanotube, and preparation method and applications thereof

A technology of carbon nanotubes and flame method, which is applied in the direction of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., can solve the problems of difficult large-scale industrial production, high reaction temperature, and high equipment requirements, and achieve good current discharge capacity, Good charge and discharge performance, increase the effect of specific surface area

Active Publication Date: 2018-07-24
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon nanotubes prepared by arc discharge method and laser ablation method have high crystallinity and straight tubes, but usually have many defects and low yield, making it difficult to carry out large-scale industrial production
The industrial production of carbon nanotubes is mainly grown by chemical vapor deposition (CVD), which has the advantages of good matrix dispersion, high packing density and controllable orientation of CNTs. However, due to its high equipment requirements, complex operation, and reaction High temperature and many reaction steps limit the popularization and application

Method used

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  • Flame method modified carbon nanotube, and preparation method and applications thereof
  • Flame method modified carbon nanotube, and preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) A certain amount of nitric acid solution with a concentration of 40% was configured, and 1 g of carbon nanotubes (purchased from Pyrograf Products Inc.) was weighed and added to the nitric acid solution, stirred for 24 hours, separated by filtration and cleaned to remove metal impurities in the carbon nanotubes, Dry it in an oven at 70°C for 12 hours, take it out and cool it to room temperature for later use;

[0036] (2) Prepare 0.05mol / L NiCl 2 The ethanol solution is used for the catalyst precursor, and the spare carbon nanotube TCNTs in the step (1) is added thereto, mixed and mechanically stirred at a speed of 1200r / min for 5min, and then ultrasonically fully dispersed for 5min at a power of 800W. After drying at ℃, the sample is placed on a stainless steel mesh;

[0037] (3) At 3 mm above the ethanol flame, the temperature was measured by a Fluke Fluker 724 temperature calibrator, so that the sample was heated at a temperature of 500 ° C and calcined for 3 mi...

Embodiment 2

[0039] Other conditions are the same as in Example 1, but the flame treatment time is extended to 10 minutes, and the obtained product is recorded as TCNT / FCNT10, and the total yield is about 125%. The outer diameter of FCNTs grown by flame treatment is 4-20nm, and the average length is less than 200nm.

Embodiment 3

[0041] Other conditions were the same as in Example 1, but the flame treatment time was extended to 20 minutes to obtain the product TCNT / FCNT20 with a total yield of about 128%. The outer diameter of FCNTs grown by flame treatment is 4-20nm, and the average length is less than 200nm.

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Abstract

The invention belongs to the technical field of carbon nanotube, and discloses a flame method modified carbon nanotube, and a preparation method and applications thereof. According to the preparationmethod, ethanol flame combustion is adopted for surface modification of carbon nanotube so as to obtain TCNTs with a relatively large pore diameter as a matrix; in the presence of a nickel salt catalyst, flame combustion time and temperature are controlled, and in-suit growth of nanometer scale short carbon nanotubes (FCNTs) on the internal wall and the external wall of the TCNTs with certain spatial constraint effect is realized, and carbon nanotube composite fractal structures with different modification effects are obtained; when the flame method modified carbon nanotube is taken as a lithium ion battery anode material, excellent lithium ion storage ratio capacity is achieved. Compared with chemical vapor deposition method in the prior art wherein expensive production equipment, enclosed production environment, and relatively temperature (higher than 650 DEG C) are needed, the preparation method possesses following advantages: only alcohol flame is needed, open production environment is enough for production, and treatment temperature is relatively low (as low as 450 DEG C); obvious competitiveness is achieved; and large scale product is more convenient to realize.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube preparation, in particular to a carbon nanotube modified by a flame method, a preparation method and application thereof. Background technique [0002] Carbon nanotubes have a very unique structure and excellent physical and chemical properties, and have great application prospects in many fields such as nanoelectronic devices, composite materials, and sensors. At present, there are three main preparation methods of carbon nanotubes, namely arc discharge method, laser ablation method and chemical vapor deposition method. Carbon nanotubes prepared by arc discharge method and laser ablation method have high crystallinity and straight tubes, but usually have many defects and low yield, making it difficult to carry out large-scale industrial production. The industrial production of carbon nanotubes is mainly grown by chemical vapor deposition (CVD), which has the advantages of good matrix dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/168
CPCC01B2202/22C01B2202/32C01B2202/34C01B2202/36
Inventor 杜续生
Owner JINAN UNIVERSITY
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