Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of quasi one-dimensional boron nitride nanostructure

A nanostructure and boron nitride technology, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of low output, poor crystallinity, and low purity of boron nitride tubes, and achieve easy control of process parameters, Large product output and good repeatability

Inactive Publication Date: 2007-10-31
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although boron nitride nanotubes were successfully prepared for the first time in 1995, and there have been many methods to prepare boron nitride nanotubes, such as arc method, laser sputtering method, chemical vapor deposition, solid-state reaction, etc., but so far , the yield of boron nitride tubes is very low and the purity is also poor
As another important one-dimensional boron nitride nanostructure, boron nitride nanowires, there are fewer reports on successful synthesis; the only few reports also have defects such as poor crystallinity, low purity and low yield.
In conclusion, the bottleneck of difficult sample preparation has significantly restricted the study of the intrinsic properties of boron nitride one-dimensional nanostructures and the realization of their potential applications.

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 quasi one-dimensional boron nitride nanostructure
  • Preparation method of quasi one-dimensional boron nitride nanostructure
  • Preparation method of quasi one-dimensional boron nitride nanostructure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The floating catalyst is ferrocene, the weight ratio relationship between the amount used and the sum of the reactants (boron powder, boron oxide) is 0.1, the evaporation temperature is 150°C, the flow rate of ammonia gas is 100 sccm, the flow rate of nitrogen gas is 300 sccm, boron powder and boron oxide The weight ratio is 1:4, the reaction temperature is 1300°C, the heating rate is 25°C / min, and the reaction time is 1 hour. Bamboo-shaped boron nitride nanotubes with a diameter of about 50 nanometers and a length of tens of micrometers were obtained, as shown in FIG. 1 . From the high-resolution image, it can be clearly seen that (0002) is arranged parallel to the axial direction, and its purity is 95%.

Embodiment 2

[0026] The floating catalyst is nickelocene, the weight ratio relationship between the amount used and the sum of reactants (boron powder, boron oxide) is 0.2, the evaporation temperature is 200°C, the flow rate of ammonia gas is 50 sccm, the flow rate of nitrogen gas is 150 sccm, boron powder and boron oxide The weight ratio is 1:4, the reaction temperature is 1400°C, the heating rate is 35°C / min, and the reaction time is 1 hour. A cup-stacked boron nitride nanowire with a diameter of about 100 nanometers and a length of tens of micrometers is obtained, as shown in FIG. 2 . From the high-resolution image, it can be clearly seen that the (0002) planes are arranged perpendicular to the axial direction, and the purity is 90%.

Embodiment 3

[0028] The floating catalyst is cobaltocene, the weight ratio relationship between the amount used and the sum of the reactants (boron powder, boron oxide) is 0.2, the evaporation temperature is 300°C, the flow rate of ammonia gas is 50 sccm, the flow rate of nitrogen gas is 200 sccm, boron powder and boron oxide The weight ratio is 1:7, the reaction temperature is 1380°C, the heating rate is 40°C / min, and the reaction time is 1 hour. The cup-stacked boron nitride nanowires with a diameter ranging from tens to two to three hundred nanometers and a length of tens of microns were obtained, and there were many secondarily grown sheets and small nanotubes on the surface, as shown in Figure 3. The arrangement of the (0002) vertical axis mentioned in Example 2 can be verified from selected area electron diffraction, and its purity is 90%.

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a controlled preparing method of pseudo one-dimensional boron nitride nanometer structure through adjusting preparation parameter to control diverse pseudo one-dimensional boron nitride nanometer structure, which comprises the following steps: choosing bis nickel, bis ferrum, bio cobalt or the mixture as suspended activator forerunner body; volatilizing in the low temperature region; carrying through gas-carrier to high-temperature region; disintegrating to metallic catalyst; accelerating B2O2 vapour generated through mixing boron powder and boron oxide to react with ammonia gas; generating the product; getting boron nitride nanometer thread and bamboo joint state boron nitride nanometer pipe with diverse diameter and outlook through controlling component, time, temperature of the activator. The structure of the boron nitride nanometer thread and pipe possesses essential difference, which the front (0002) face grow vertically and the back (0002) face parallel-grows.

Description

Technical field: [0001] The invention relates to a controllable preparation method of a boron nitride quasi-one-dimensional nanostructure, which is suitable for the controllable preparation of quasi-one-dimensional boron nitride nanotubes and nanowires with different shapes and structures, and the yield of the product is large and the purity is high. Background technique: [0002] Since the discovery of carbon nanotubes in 1991, the preparation and application of various systems of one-dimensional nanostructures have attracted widespread attention. The structure of hexagonal boron nitride is very close to that of graphite, which can be regarded as the replacement of carbon atoms in graphite by nitrogen atoms and boron atoms to form sp 2 Hybrid graphite-like lamellar structure. The electrical properties (bandgap width) of carbon nanotubes vary with diameter and chirality, which is difficult to control, thus increasing the difficulty of practical application. Compared with c...

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): C01B21/064
Inventor 刘畅汤代明成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com