Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of nitrogen-doped carbon nanohorn

A nitrogen-doped carbon and nanohorn technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of high cost of carbon nanohorns, difficult to prepare carbon nanohorns, etc., and achieve high production efficiency and production cost. Low, high purity effect

Active Publication Date: 2018-05-01
JIANGSU FENGCHI CARBON BASED NEW MATERIAL RES INST CO LTD
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the cost of preparing carbon nanohorns by laser method is high, and it is not easy to prepare doped carbon nanohorns.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of nitrogen-doped carbon nanohorn
  • Preparation method of nitrogen-doped carbon nanohorn
  • Preparation method of nitrogen-doped carbon nanohorn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The graphite rod is used as the cathode and anode of the arc. The diameter of the graphite rod is 10mm, the distance between the two poles is 1mm, and the cathode and anode are placed vertically. After the electric arc furnace is pumped to a vacuum of 3Pa, the DC arc discharge current is 200A, and the charge is 70KPa. Nitrogen-doped carbon nanohorns are collected from the inner wall deposits of the reaction chamber after 5 min of discharge.

[0028] The perspective electron microscope image of the nitrogen-doped carbon nanohorn prepared in this example is as follows: figure 2 It can be seen from the figure that 'dahlia'-shaped carbon nanohorns were prepared; the X-ray diffraction pattern is shown in image 3 The poor crystallinity of the prepared carbon nanohorns is mainly due to the doping of nitrogen and the disordered structure of the carbon nanohorns; the X-ray photoelectron spectrum is shown in Fig. Figure 4 It can be seen from the figure that the prepared carbo...

Embodiment 2

[0030] The graphite rod is used as the cathode and anode of the arc. The diameter of the graphite rod is 10mm, the distance between the two poles is 1mm, and the cathode and anode are placed vertically. After the electric arc furnace is pumped to a vacuum of 3Pa, the DC arc discharge current is 250A, and the charge is 50KPa. Nitrogen-doped carbon nanohorns are collected from the inner wall deposits of the reaction chamber after 5 min of discharge.

[0031] The perspective electron microscope image of the nitrogen-doped carbon nanohorn prepared in this example is as follows: Figure 7 It can be seen from the figure that 'dahlia'-shaped carbon nanohorns were prepared.

Embodiment 3

[0033] The graphite rod is used as the cathode and anode of the arc. The diameter of the graphite rod is 10mm, the distance between the two poles is 1mm, and the cathode and anode are placed vertically. After the electric arc furnace is pumped to a vacuum of 3Pa, the DC arc discharge current is 200A, and the charge is 70KPa. air and start the arc, after 10 minutes of discharge, the sediments on the inner wall of the reaction chamber are collected as nitrogen-doped carbon nanohorns.

[0034] The perspective electron microscope image of the nitrogen-doped carbon nanohorn prepared in this example is as follows: Figure 7 It can be seen from the figure that 'dahlia'-shaped carbon nanohorns were prepared.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
purityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of nitrogen-doped carbon nanohorn, belonging to the field of preparation of a carbon nano material through a direct current arc method. According to the method preparing nitrogen-doped carbon nanohorn through the direct current arc method, graphite rods are used as a cathode and an anode of an arc, and the cathode and the anode are vertically arranged,an arc furnace is vacuumized, then is filled with buffer gas and is started, after reaction is finished, the precipitate on the inner wall of a reaction cavity is the nitrogen-doped carbon nanohorn and is collected. A transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS) show that the precipitate on the inner wall is nitrogen-doped carbon nanohorn, the carbon nanohorn has high purity, the diameter of a single particle is 2-5nm, and the particles gather to form a spherical aggregate with a diameter of 80-100nm. The method preparing the nitrogen-doped carbon nanohornthrough the direct current arc method has the advantages of being safe and reliable, being low-cost, having a simple operation process, and preparing high-quality nitrogen-doped carbon nanohorn.

Description

technical field [0001] The invention relates to a method for preparing nitrogen-doped carbon nanohorn, and belongs to the field of preparing carbon nanomaterials by a direct current arc method. Background technique [0002] Single-walled carbon nanohorns (carbon nanohorns for short, SWNHs) are another emerging carbon nanomaterial after carbon nanotubes in recent years. The diameter of a single carbon nanohorn is 2~5nm, one end is a closed cone structure, the other end is open, and the length is 10~20nm. Carbon nanohorns usually exist as spherical aggregates with a diameter of 80–100 nm, and the aggregates have three morphologies: dahlia-like aggregates, bud-like aggregates, and seed-like aggregates. type (Azami T, et al. J PhysChem C, 2008, 112:1330.). Its morphology is similar to that of truncated single-walled carbon nanotubes, but it has a unique tapered structure at one end. Due to the huge van der Waals forces between tubes, SWNHs self-aggregate together to form firs...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/18
CPCC01P2002/72C01P2002/82C01P2002/80C01P2002/01C01P2004/64C01P2006/12C01P2006/80
Inventor 梁风张达姚耀春马文会杨斌戴永年
Owner JIANGSU FENGCHI CARBON BASED NEW MATERIAL RES INST CO LTD