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Preparation method for large-diameter and super-long nano carbon tube

A technology of carbon nanotubes and large diameters, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., which can solve the problems of time-consuming, cumbersome steps, and low yield

Active Publication Date: 2014-10-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares carbon tubes through organic synthesis reactions. Although the diameter of carbon tubes can be precisely regulated, the steps are cumbersome, time-consuming, and the production cost is high. The yield is extremely low and the use of more organic reagents is not environmentally friendly.

Method used

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  • Preparation method for large-diameter and super-long nano carbon tube
  • Preparation method for large-diameter and super-long nano carbon tube
  • Preparation method for large-diameter and super-long nano carbon tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Add 1g of glucosamine hydrochloride and 100ml of deionized water into a 250ml beaker, stir to dissolve, then add 0.48g of transition metal salt nickel nitrate, and stir until a uniform solution. Add 20g melamine then, dissolve in the above-mentioned glucosamine hydrochloride solution. Heat and stir until the deionized water is completely volatilized to obtain a solid mixture, which is calcined in a nitrogen furnace through a two-stage heating program (600°C for 1h and 1000°C for 1h), and treated with HCl to obtain nano-carbon materials.

[0054] The scanning electron microscope picture of the carbon nanomaterial prepared in this embodiment is shown in figure 2 , as can be seen from the electron microscope images, the material prepared under this condition has a sheet-like structure in a large range, and there are obvious protrusions on the surface of the sheet, which are just formed short carbon tubes.

Embodiment 2

[0056] Add 1g of glucosamine hydrochloride and 150ml of deionized water into a 250ml beaker, stir to dissolve, then add 0.95g of transition metal salt nickel nitrate, and stir until a uniform solution. Add 20g melamine then, dissolve in the above-mentioned glucosamine hydrochloride solution. Heat and stir until the deionized water is completely volatilized to obtain a solid mixture, which is calcined in a nitrogen furnace through a two-stage heating program (600°C for 1h and 1000°C for 1h), and treated with HCl to obtain nano-carbon materials.

[0057] The scanning electron microscope picture of the carbon nanomaterial prepared in this embodiment is shown in image 3 , as can be seen from the electron microscope image, the material prepared by this method is the coexistence of tubular structure and sheet structure, and there are a large number of long tubes on the sheet layer. Compared with Example 2, the proportion of carbon tubes in the material prepared under this condition...

Embodiment 3

[0059] Add 1g of glucosamine hydrochloride and 200ml of deionized water into a 250ml beaker, stir to dissolve, then add 1.1g of transition metal salt nickel nitrate, and stir until a uniform solution. Add 20g melamine then, dissolve in the above-mentioned glucosamine hydrochloride solution. Heat and stir until the deionized water is completely volatilized to obtain a solid mixture. After the mixture is calcined in a nitrogen furnace through a two-stage heating program (600°C for 1h, 1000°C for 1h), HCl treatment and purification can obtain a large diameter, ultra-long nanometer carbon tube.

[0060] The scanning electron micrograph of carbon nanotubes prepared in this embodiment is shown in Figure 4 , from the results of electron microscopy, the inner diameter of carbon tubes is within 50-100nm, and the length is in the order of microns. It can be seen from the electron microscope images that the materials prepared by this method form a tubular structure in a large range.

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Abstract

The invention discloses a preparation method for a large-diameter and super-long nano carbon tube. According to the preparation method, a carbohydrate is used as a raw material, and is uniformly mixed with an artificial template physically in the presence of a transition metal salt, the mixture is subjected to heat preservation for 0.5-2 hours at the temperature of 400-650 DEG C under an inert atmosphere, and then the temperature is increased to 700-1200 DEG C for calcination for 0.5-2 hours to obtain the large-diameter and super-long nano carbon tube; the artificial template is melamine, dicyandiamide, urea or single cyanide. The method is simple in process, small in equipment investment, small in batch difference, and suitable for large-scale production; the inner diameter of the prepared nano carbon tube is 50-100 nm, the length is micron-sized, the tube wall is formed by stacking graphene sheet layers, and the tube has a higher specific surface area.

Description

technical field [0001] The invention relates to the field of preparation of carbon materials, in particular to a preparation method of large-diameter and ultra-long nanometer carbon tubes. Background technique [0002] Carbon chemistry is the foundation of the contemporary chemical industry. With the discovery of new carbon materials such as carbon nanotubes, carbon nanofibers, fullerenes and graphene, scientists are increasingly aware of the importance of carbon materials in scientific development and human progress. status. Carbon materials are widely used in heterogeneous catalysis, separation science, and energy conversion due to their high chemical stability, high specific surface area, excellent mechanical properties, and good electrical properties. Among them, carbon nanotube materials (hereinafter referred to as "carbon tubes") are often used as catalyst carrier materials, drug carriers, photoelectric devices and water purification materials, and are an important cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00B82Y40/00
Inventor 王勇王静巩玉同王世萍韩传龙
Owner ZHEJIANG UNIV
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