Method for preparing molybdenum diselenide nanotubes

A technology of molybdenum diselenide and nanotubes, applied in the direction of binary selenium/tellurium compounds, nanotechnology, metal selenide/telluride, etc., can solve the problem of less research on one-dimensional materials, and achieve strong size controllability , improve comprehensive performance, and be conducive to the effect of large-scale industrial production

Active Publication Date: 2018-04-20
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current research reports mainly focus on the preparation and performance research of multi-layer molybdenum diselenide. There are few studies on one-dimensional materials, especially the preparation methods.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method for molybdenum diselenide nanotubes, comprising the following process steps:

[0018] 1) Spread 5g of molybdenum hexacarbonyl on the bottom of a ceramic crucible, place a porous anodized aluminum template with a pore diameter of 40nm downwards on top of the molybdenum hexacarbonyl, seal the crucible and place it in a vacuum tube furnace, and feed it with 100 SCCM of argon Gas cleaning of the air in the furnace tubes. Under the protection of 100SCCM argon gas, raise the temperature to 100°C and keep it for 60 minutes, then continue to raise the temperature to 300°C and keep it for 40 minutes to get metal molybdenum deposition, stop heating;

[0019] 2) After the vacuum tube furnace in step 1) is down to room temperature, take out the porous anodized aluminum template, place its opening downwards in a ceramic crucible filled with selenium powder, seal the crucible and place it in a vacuum tube furnace, Under the protection of 100SCCM argon gas, heat ...

Embodiment 2

[0022] A preparation method for molybdenum diselenide nanotubes, comprising the following process steps:

[0023] 1) Spread 5g of molybdenum hexacarbonyl on the bottom of a ceramic crucible, place a porous anodized aluminum template with a pore size of 10nm downwards on top of the molybdenum hexacarbonyl, seal the crucible and place it in a vacuum tube furnace, and pass it into 100SCCM of argon Gas cleaning of the air in the furnace tubes. Under the protection of 100SCCM argon gas, raise the temperature to 50°C and keep it for 200min, then continue to raise the temperature to 300°C and keep it for 40min to get metal molybdenum deposition, stop heating;

[0024] 2) After the vacuum tube furnace in step 1) is down to room temperature, take out the porous anodized aluminum template, place its opening downwards in a ceramic crucible filled with selenium powder, seal the crucible and place it in a vacuum tube furnace, Under the protection of 100SCCM argon gas, heat up to 220°C and...

Embodiment 3

[0027] A preparation method for molybdenum diselenide nanotubes, comprising the following process steps:

[0028] 1) Spread 5g of molybdenum hexacarbonyl on the bottom of a ceramic crucible, place a porous anodized aluminum template with a pore size of 200nm downwards on top of the molybdenum hexacarbonyl, seal the crucible and place it in a vacuum tube furnace, and feed it with 100 SCCM of argon Gas cleaning of the air in the furnace tubes. Under the protection of 100SCCM argon gas, raise the temperature to 150°C and keep it for 30 minutes, then continue to raise the temperature to 300°C and keep it for 40 minutes to get metal molybdenum deposition, stop heating;

[0029] 2) After the vacuum tube furnace in step 1) is down to room temperature, take out the porous anodized aluminum template, place its opening downwards in a ceramic crucible filled with selenium powder, seal the crucible and place it in a vacuum tube furnace, Under the protection of 100SCCM argon gas, heat up ...

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Abstract

The invention discloses a method for preparing molybdenum diselenide nanotubes. The method comprises the following steps: 1) laying molybdenum hexacarbonyl to the bottom of a ceramic crucible, layinga porous anodic aluminum oxide mold plate with an opening facing downwards on the molybdenum hexacarbonyl, sealing the ceramic crucible, putting into a tubular furnace, performing low-temperature sublimation deposition in the presence of a gas, and continuously performing heating pyrolysis; 2) cooling the vacuum tubular furnace to the room temperature, putting the mold plate with the opening facing downwards into a ceramic crucible with selenium powder, sealing the ceramic crucible, heating in the presence of the gas, and enabling a single substance, namely selenium, to react with a metal, namely molybdenum, directly; 3) removing the excessive aluminum oxide mold plate and excessive selenium by using a diluted acid solution, performing suction filtration treatment, and drying, thereby obtaining a finished product. The method disclosed by the invention is simple in step, free of environment pollution and free of complex equipment, a molybdenum diselenide nanotube powder material prepared by using the method is good in size controllability, good in crystallinity and uniform in nanotube wall and morphology, and thus the comprehensive properties of a finished product of the molybdenumdiselenide nanotube powder material are greatly improved. The method is wide in applicability and beneficial to large-scale industrial production.

Description

technical field [0001] The invention relates to the field of semiconductor nanomaterials, in particular to a method for preparing semiconductor nanotubes. Background technique [0002] Two-dimensional semiconductor materials have been studied more and more because of their inherent large band gap. But for graphene, although it has great research value in electronics because of its remarkable carrier mobility, its application in optoelectronics is greatly limited due to the lack of band gap. Molybdenum diselenide is a transition metal selenide with a two-dimensional layered structure with a band gap. It is stacked by sandwich units composed of hexagonal X-M-X. Metal elements and selenium elements are combined into a single sandwich by covalent bonds unit, and different units are joined by weak van der Waals forces. This unique energy band structure determines that they have abundant electronic states, making them very suitable for applications in electronics, photonics and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y40/00
CPCB82Y40/00C01B19/007C01P2004/13
Inventor 胡柱东林海敏
Owner FOSHAN UNIVERSITY
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