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An aluminum nitride nanometer comb and preparation method thereof

A nano-comb, aluminum nitride technology, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of difficult process control, long synthesis time, environmental pollution, etc., and achieves short preparation time, simple method, and purity. high effect

Inactive Publication Date: 2009-08-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people have prepared aluminum nitride nanowires, nanoribbons, Nanotips, nanotubes, and aluminum nitride nanostructures with peculiar shapes, such as nanoflowers, nanorings, etc., but the method of preparing nanocombs requires high cost, long synthesis time and complicated process that is difficult to control, which limits its development; And pollute the environment due to the use of catalysts and templates
[0004] There is no report on the preparation of AlN double-sided nanocombs or mixed double-sided and single-sided nanocombs.

Method used

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  • An aluminum nitride nanometer comb and preparation method thereof
  • An aluminum nitride nanometer comb and preparation method thereof
  • An aluminum nitride nanometer comb and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 combined figure 1 A device for preparing nanocombs of the present invention is described.

[0029] figure 1 Among them, 1 is the reaction chamber; 2 is the water-cooled collection wall; 3 is the tungsten cathode, which can be rod-shaped; 4 is the aluminum block; 5 is the anode of the copper pot, and the cathode 3 and the anode 5 are connected to the DC power supply; 6 is the circulating cooling water port , including a water inlet and a water outlet; 7 is a gas mixture inlet; 8 is an air release port, 9 is a water inlet of a water-cooled collection wall, and 10 is a water outlet of a water-cooled collection wall.

[0030] The water-cooled collection wall 2 is used for cooling the reaction, so as to protect the device for preparing the nanocomb.

Embodiment 2

[0031] Example 2 The whole process of preparing AlN double-sided nanocombs.

[0032] First, high-purity Al blocks (purity 99.999%) are put into a copper pot in a reaction chamber of a DC arc discharge device. The anode of the arc discharge device is a copper pot, the cathode is a tungsten electrode with a diameter of 3mm, and the anode is fed with circulating cooling water. The reaction chamber of the DC arc discharge device is evacuated (less than 5 Pa), and then filled with a mixed gas of nitrogen and ammonia (purity 99.999%) to 20 kPa. The volume ratio of ammonia in the mixed gas is 25%. After reacting at a voltage of 15V and a current of 80A for 10 minutes, the white powder collected on the anode copper pot and the Al block was AlN double-sided nanocomb.

[0033] from figure 2 , image 3 Given the double-sided nanocomb structure prepared in Example 2, the nanowire arrays on both sides grow symmetrically from the middle trunk in two directions respectively, and it can ...

Embodiment 3

[0035] Example 3 The whole process of preparing AlN double-sided nanocombs.

[0036] First, high-purity Al blocks (purity 99.999%) are put into a copper pot in a reaction chamber of a DC arc discharge device. The anode of the arc discharge device is a copper pot, the cathode is a tungsten electrode with a diameter of 8mm, and the anode is fed with circulating cooling water. The reaction chamber of the DC arc discharge device is evacuated (less than 5pa), and then filled with a mixed gas of nitrogen and ammonia (purity 99.999%) to 50kPa. The volume ratio of ammonia in the mixed gas is 30%. After reacting at a voltage of 40V and a current of 120A for 100 minutes, the white powder collected on the anode copper pot and the Al block was AlN double-sided nanocomb.

[0037] Image 6 It is the SEM image of the AlN double-sided nanocomb made in the present embodiment. from Image 6 It can be seen that the double-sided nanocomb structure, the nanowire arrays on both sides of it grow ...

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Abstract

The invention provides an aluminum nitride nanometer comb and a preparation method thereof, belonging to the technical field of a nanometer material and preparation thereof. The aluminum nitride nanometer comb is a nanometer comb with a bilateral comb-shaped structure formed by a nanometer wire array, or a mixed structure of the bilateral comb-shaped structure and a monolateral comb-shaped structure, wherein the nanometer wire is formed by AlN with a hexagonal wurtzite crystal structure, with diameter of about between 50 and 80 nanometers and length of about between 1 and 1.5mu meters. The preparation method adopts a direct-current electrical arc discharge device, and leads metal aluminum to react with a mixed gas of nitrogen and ammonia under a condition of high-temperature and low pressure system so as to prepare a white nanometer comb sample. The method synthesizes the AlN nanometer comb structure with high purity and even arrangement for the first time; the preparation method has the advantages of simpleness, good repeatability, short time, low cost and friendly to environment; and the comb and the method have application prospect in laser interference / coupling, nanometer laser array, nanometer electro-mechanics and other fields.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a simple method for preparing high-purity aluminum nitride double-sided nanocombs. Background technique [0002] Since Iijima first observed carbon nanotubes with a high-resolution electron microscope in 1991, the research on one-dimensional nanostructured materials (nanowires, nanotubes, nanorods, and nanobelts, etc.) has been a foreword and hotspot in the field of nanostructured materials. This is because one-dimensional nanostructured materials play a very important role in understanding the basic physical properties of nanomaterials and building nanofunctional devices and other application fields. With the development of one-dimensional nanomaterials, hierarchical nanostructures, such as nanocombs and tetraneedle nanorods, have been reported one after another. But so far, only ZnO single-sided and double-sided nanocombs have been controllably syn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/072
Inventor 类伟巍崔啟良刘丹张剑陈晓辉郝健金云霞詹宝庆王秋实梁罡
Owner JILIN UNIV
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