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Nitrogen-doped carbon nanotubes filled with nickel and its preparation method and application

A nanotube and nitrogen-carbon technology, which is applied in the field of nickel-filled nitrogen-doped carbon nanotubes and its preparation, can solve the problems of limiting the industrial application of nickel-filled carbon nanotubes, cumbersome preparation process, harsh reaction conditions, etc., and achieves excellent oxygen reduction efficiency. Catalytic performance, wide source of raw materials, and low equipment requirements

Active Publication Date: 2021-01-15
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the current method for preparing nickel-filled carbon nanotubes has problems such as low yield, low nickel filling, harsh reaction conditions, cumbersome preparation process, and unsafety. It is difficult to put into actual industrial production, which limits the nickel filling Industrial Application of Carbon Nanotubes

Method used

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  • Nitrogen-doped carbon nanotubes filled with nickel and its preparation method and application
  • Nitrogen-doped carbon nanotubes filled with nickel and its preparation method and application
  • Nitrogen-doped carbon nanotubes filled with nickel and its preparation method and application

Examples

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Embodiment 1

[0034] In this example, melamine is used as a carbon and nitrogen source to prepare nickel-filled nitrogen-doped carbon nanotubes, and the following operations are performed in sequence:

[0035] (1) Disperse 2.0 g of nickel chloride and 4.0 g of melamine in 20 mL of absolute ethanol, stir and then sonicate for 15 min, put it in a drying oven at 100 ° C for 5 h to obtain a solid mixture, and grind to obtain a mixed powder.

[0036] (2) Put the mixed powder into a porcelain boat and place it in a high-temperature tube furnace. Nitrogen was introduced at a rate of 150 mL / min, the temperature was raised to 800 °C at a rate of 6 °C / min, calcined for 1 hour, and naturally cooled to room temperature to obtain a black powder.

[0037] (3) Put the black powder into 10 mL of hydrochloric acid with a substance concentration of 1 mol / L, stir for one and a half hours, let stand for 1 to 2 days, and filter and dry to obtain nickel-filled nitrogen-doped carbon nanotubes, the final product ...

Embodiment 2

[0040] In this example, melamine is used as a carbon and nitrogen source to prepare nickel-filled nitrogen-doped carbon nanotubes, and the following operations are performed in sequence:

[0041] (1) Disperse 2.0 g of nickel chloride and 6.0 g of melamine in 20 mL of absolute ethanol, stir, then sonicate for 20 min, dry in an oven at 90°C for 6 h to obtain a solid mixture, and grind to obtain a mixed powder.

[0042] (2) Put the mixed powder into a porcelain boat and place it in a high-temperature tube furnace. Nitrogen was introduced at a rate of 150 mL / min, the temperature was raised to 900 °C at a rate of 8 °C / min, calcined for 2 hours, and naturally cooled to room temperature to obtain a black powder.

[0043] (3) Put the black powder into 10 mL of hydrochloric acid with a substance concentration of 0.5 mol / L, stir for one and a half hours, let stand for 1 to 2 days, filter and dry with suction to obtain nickel-filled nitrogen-doped carbon nanotubes.

[0044] The SEM of t...

Embodiment 3

[0048] In this embodiment, dicyandiamide is used as a carbon and nitrogen source to prepare nickel-filled nitrogen-doped carbon nanotubes, and the following operations are performed in sequence:

[0049] (1) Disperse 2.0g of nickel chloride and 2.0g of dicyandiamide in 20mL of absolute ethanol, stir and then ultrasonic for 30min, put it in a drying oven at 110°C for 8h to obtain a solid mixture, and grind to obtain a mixed powder .

[0050] (2) Put the mixed powder into a porcelain boat and place it in a high-temperature furnace. Nitrogen was introduced at a rate of 150 mL / min, the temperature was raised to 700 °C at a rate of 10 °C / min, calcined for 2 hours, and naturally cooled to room temperature to obtain a black powder.

[0051] (3) Put the black powder into 10 mL of hydrochloric acid with a substance concentration of 1 mol / L, stir for one and a half hours, let stand for 1 to 2 days, filter and dry with suction to obtain nickel-filled nitrogen-doped carbon nanotubes.

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Abstract

The invention relates to nickel-filled nitrogen-doped carbon nanotubes as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) adding nickelchloride and a carbon and nitrogen source into a dispersant, uniformly stirring, performing ultrasonic treatment, drying and grinding to obtain mixed powder, wherein the carbon and nitrogen source isone or more of tripolycyanamide, dicyanamide and cyanamide; (2) calcining the mixed powder obtained in the step 1 in an inert gas atmosphere, and then performing acid treatment to obtain the nickel-filled nitrogen-doped carbon nanotubes. The invention further provides the nickel-filled nitrogen-doped according to the preparation method and application of the carbon nanotubes. According to the preparation method, the nickel-filled nitrogen-doped carbon nanotubes are prepared through groundbreaking simple high-temperature pyrolysis of a mixture of the nickel chloride and the carbon and nitrogensource; compared with a single nickel-filled carbon nanotube preparation method, the preparation method provided by the invention has the advantages as follows: the filling rate of nickel is greatly improved, and doping of nitrogen also greatly improves the electrochemical performance of the carbon nanotubes; the nickel-filled nitrogen-doped carbon nanotubes have a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a nickel-filled nitrogen-doped carbon nanotube and its preparation method and application. Background technique [0002] Carbon nanotubes (CNTs) are a new type of nano-carbon material with excellent electronic conductivity, adsorption, and electrochemical catalytic properties. It has been widely used in fields such as field emission sources, composite materials, hydrogen storage materials, and catalysts. application. At present, the methods for preparing carbon nanotubes mainly include arc method, catalytic cracking of hydrocarbons, laser evaporation and condensation of carbon-nickel-cobalt mixture and electrochemical deposition. [0003] Scientists have found that doping non-metallic elements in carbon nanotubes and filling metal simple substances or metal oxides in carbon nanotubes can significantly improve their performance. Therefore, in recent years,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08
Inventor 钟国玉李思敏傅小波
Owner DONGGUAN UNIV OF TECH
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