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Preparation method of high-purity and high-density MoO2 lamellar nanometer structure

A nano-structured and lamellar technology, applied in the field of material preparation, can solve the problems of severe reaction, low yield, difficult control, etc., and achieve the effect of high density, smooth reaction and uniform shape

Inactive Publication Date: 2016-05-04
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former reacts violently and is difficult to control, while the latter uses flammable and explosive hydrogen, so both are dangerous; and the yields of the two methods are relatively low

Method used

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  • Preparation method of high-purity and high-density MoO2 lamellar nanometer structure
  • Preparation method of high-purity and high-density MoO2 lamellar nanometer structure

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preparation example Construction

[0027] MoO proposed by the present invention 2 A method for preparing a layered nanostructure, comprising the following steps and contents:

[0028] (1) The evaporation source used is commercially available analytically pure MoO 3 powder and S powder.

[0029] (2) In the double temperature zone vacuum tube furnace, MoO will be installed separately 3 Alumina ceramic crucibles of powder and S powder, or filled with MoO 3 The alumina ceramic crucible of powder and S mixed powder is placed in the central area of ​​the furnace in the high-temperature heating zone, and the substrate is placed in the low-temperature heating zone 10-40cm downstream of the airflow.

[0030] (3) will be equipped with analytically pure MoO 3 When the alumina ceramic crucible of powder and S powder is placed in the central area of ​​the furnace in the high temperature heating zone, it will be filled with MoO 3 The powdered alumina ceramic crucible is placed in the heating zone with the highest temper...

Embodiment 1

[0038] Example 1: In a double-temperature zone vacuum tube furnace, place an alumina ceramic crucible containing 0.5 g of analytically pure molybdenum trioxide powder in the high-temperature heating zone of the furnace, and place the crucible 3 cm away from the crucible containing molybdenum trioxide powder downstream of the air flow. There is an alumina ceramic crucible with 1g of analytically pure sulfur powder, and a silicon chip is placed at a distance of 15cm from the crucible with molybdenum oxide powder downstream of its airflow.

[0039] Before heating, use a vacuum pump to evacuate the entire system to below 0.05Pa, then feed 99.99vol.% argon into the system, and repeat 3 times to remove the air in the system. Then the high-temperature heating zone was heated to 950°C at a rate of 15°C / min, and the temperature of the low-temperature heating zone was raised to 450°C at a rate of 20°C / min, and kept for 2 hours. During the entire heating process, keep the carrier gas f...

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Abstract

The invention relates to a preparation method of a high-purity and high-density MoO2 lamellar nanometer structure and belongs to the technical field of material preparation. In a vacuum heating furnace, molybdenum trioxide (MoO3) and sulphur (S) powder serve as an evaporation source, and the MoO2 lamellar nanometer structure is synthesized and grows on a substrate in a controllable mode through a thermal evaporation method in a vacuum environment under the effect of carrier gas. The method has the advantages that reaction is mild, the synthesizing and growing conditions of nanomaterials are strictly controllable, equipment and the technology are simple, the product yield and purity are high, cost is low, and the method is environmentally friendly. The obtained nanometer structure product is high in density, the thickness distribution of the nanometer structure is uniform, and it is expected that the nanometer structure is widely applied in the aspects of electronic devices, lithium ion batteries and the like.

Description

technical field [0001] The present invention relates to a kind of high purity, high density MoO 2 The invention discloses a method for preparing a lamellar nanostructure, belonging to the technical field of material preparation. Background technique [0002] Compared with traditional bulk materials, nanomaterials often have incomparable advantages in performance. With the development of nanotechnology, the material preparation process is also constantly enriched. In recent years, with the discovery of graphene, people's attention has turned to two-dimensional nanomaterials. Due to their special microstructure and properties, two-dimensional nanomaterials have been widely used in diodes and electron tubes, and also have broad application prospects in catalysts, lithium batteries, and electrochemistry. [0003] transition metal oxide MoO 2 Belongs to the monoclinic crystal system with a distorted rutile crystal structure. in MoO 2 Among them, oxygen ions are closely pack...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B29/64C30B25/00B82Y40/00
CPCB82Y40/00C30B25/00C30B29/46C30B29/64
Inventor 李汉青彭志坚钱静雯申振广符秀丽
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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