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High-density boundary double-layer molybdenum disulfide nano sheet and preparation method thereof

A molybdenum disulfide, high-density technology, applied in the field of nanomaterials, can solve the problems of reducing catalytic efficiency and affecting the conductivity of molybdenum disulfide, and achieve the effect of less process flow, good electrical conductivity, and high-density boundary

Active Publication Date: 2018-05-11
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of uncontrollable defects on the molybdenum disulfide basal surface includes direct plasma bombardment, annealing in a reducing atmosphere, etc. will divide the basal surface of molybdenum disulfide into discontinuous domains, thus affecting the overall conductivity of molybdenum disulfide. property, reducing the catalytic efficiency

Method used

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  • High-density boundary double-layer molybdenum disulfide nano sheet and preparation method thereof
  • High-density boundary double-layer molybdenum disulfide nano sheet and preparation method thereof
  • High-density boundary double-layer molybdenum disulfide nano sheet and preparation method thereof

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Embodiment 1

[0041] Such as figure 1 As shown, it is a flow chart of a method for growing high-density boundary double-layer molybdenum disulfide nanosheets on a glass slide according to an embodiment of the present invention. figure 2 Schematic diagram of the preparation method. The preparation method of described high-density boundary double-layer molybdenum disulfide nanosheets comprises:

[0042] In order to achieve the above purpose, an embodiment of the present invention provides a method for growing high-density border double-layer molybdenum disulfide nanosheets on a glass slide, comprising the following steps:

[0043] Step 101, pretreatment of the substrate;

[0044] Step 102, cleaning of the substrate;

[0045] Step 103, drying of the substrate;

[0046] Step 104, growing pyramidal molybdenum disulfide on the substrate by chemical vapor deposition;

[0047] In said step 101: the commercial slides are cut into small pieces of 2.5 cm in length and 1.5 cm in width, and then s...

Embodiment 2

[0065] In this embodiment, the mass concentration of hydrofluoric acid in step 101 is 35%, and the cleaning time is 5 minutes.

[0066] In step 104, the temperature control of the three temperature zones during the growth process is as follows: increase from 30°C to 300°C after 13 minutes, keep it for 10 minutes, then raise the temperature to 1200°C after 12 minutes and keep it for 2 minutes, then cool down to 650°C after 3 minutes And open the tube furnace to cool down quickly.

[0067] During the growth process, the air flow is regulated as follows: the air flow is always 20 sccm before the furnace is turned on for rapid cooling, and it is 150 sccm after the furnace is turned on.

Embodiment 3

[0069] In this embodiment, the mass concentration of hydrofluoric acid in step 101 is 30%, and the cleaning time is 10 minutes.

[0070] In step 104, the temperature control of the three temperature zones during the growth process is as follows: increase from 30°C to 300°C after 5 minutes, hold for 5 minutes, then raise the temperature to 800°C after 10 minutes and hold for 8 minutes, cool down to 750°C after 6 minutes and open The tube furnace cools down quickly.

[0071] During the growth process, the air flow is regulated as follows: the air flow is always 30 sccm before the furnace is turned on for rapid cooling, and is 250 sccm after the furnace is turned on.

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Abstract

The invention relates to a high-density boundary double-layer molybdenum disulfide nano sheet and a preparation method thereof. The preparation method comprises the following steps: S1, placing a glass slide as a substrate into a hydrofluoric acid for soaking for 5-10 minutes, then cleaning and removing the silicate reaction product on the surface, and carrying out drying for later use; and S2, using a chemical vapor deposition method, using sublimated sulfur as a sulfur source, and molybdenum trioxide, molybdenum chloride and ammonium tathiomolybdate as molybdenym sources, and using a three-temperature-zone tube furnace to make molybdenum disulfide to grow on the substrate. The double-layer molybdenum disulfide nano sheet provided by the invention has uniform size, higher density boundary, and good conductivity and catalytic performance, and the preparation method is simple in operation, less in process flow and low in cost.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a high-density boundary double-layer molybdenum disulfide nanosheet and a preparation method thereof. Background technique [0002] Hydrogen energy has become one of the most commercially available clean energy sources due to its high energy density, storability and renewability. Most of the current hydrogen production methods are at the cost of fossil fuel consumption, which fails to achieve the purpose of environmentally friendly energy conversion. Generating electricity based on clean energy and using the resulting electricity to electrolyze water to produce hydrogen is the most likely way to realize and commercialize energy generation and storage in the future. A high-efficiency and stable catalyst is the prerequisite for large-scale hydrogen production, and the active sites in the catalyst can reduce the overpotential of the hydrolysis reaction and accelerate the tran...

Claims

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Application Information

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IPC IPC(8): C01G39/06C01B3/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B3/042C01G39/06C01P2004/20C01P2004/52Y02E60/36
Inventor 张璋苏绍强周青伟程鹏飞
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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