Pyramidal molybdenum disulfide nanosheet and preparation method and application thereof

A molybdenum disulfide, pyramid-shaped technology, applied in the field of pyramid-shaped molybdenum disulfide nanosheets and its preparation, can solve the problems of reducing catalytic efficiency and affecting the conductivity of molybdenum disulfide, and achieve less process flow, good electrical conductivity and catalytic performance. Performance, Effects of High Density Borders

Inactive Publication Date: 2018-04-27
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 th

Method used

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  • Pyramidal molybdenum disulfide nanosheet and preparation method and application thereof
  • Pyramidal molybdenum disulfide nanosheet and preparation method and application thereof
  • Pyramidal molybdenum disulfide nanosheet and preparation method and application thereof

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Embodiment 1

[0040] Such as figure 1 Shown is a flow chart of a method for preparing a pyramidal molybdenum disulfide with a high-density border in an embodiment of the present invention, figure 2 It is a schematic diagram and a physical picture of the preparation method. The pyramidal molybdenum disulfide method of the high-density boundary includes:

[0041] Step 101, pretreatment of the substrate;

[0042] Step 102, cleaning of the substrate;

[0043] Step 103, drying of the substrate;

[0044] Step 104, growing pyramidal molybdenum disulfide on the substrate by chemical vapor deposition;

[0045] In the processing of the step base: the commercial slides are cut into 2.5cm long and 1.5cm wide pieces, then soaked in hydrofluoric acid solution for 5 min, the concentration of hydrofluoric acid is 40% (Tianjin University Mao Chemical Reagent Factory).

[0046] In the cleaning of the substrate in the above step: Remove the products generated by the surface silicate reaction on the soa...

Embodiment 2

[0062] In this embodiment, the mass concentration of hydrofluoric acid in step 101 is 35%, and the cleaning time is 5 minutes.

[0063] 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 750°C after 10 minutes and hold for 5 minutes, cool down to 650°C after 3 minutes and open The tube furnace cools down quickly.

[0064] During the growth process, the gas flow was adjusted to 200 sccm before the temperature was raised to 650°C and after the tube furnace was turned on for rapid cooling, and the gas flow was 25 sccm during the period.

Embodiment 3

[0066] In this embodiment, the mass concentration of hydrofluoric acid in step 101 is 30%, and the cleaning time is 5 minutes.

[0067] In step 104, the temperature control of the three temperature zones during the growth process is as follows: increase from 30°C to 400°C after 15 minutes, hold for 8 minutes, then raise the temperature to 740°C after 9 minutes and hold for 8 minutes, cool down to 680°C after 5 minutes and Turn on the tube furnace to cool down quickly.

[0068] During the growth process, the gas flow was adjusted to 200 sccm before the temperature was raised to 700°C and after the tube furnace was turned on for rapid cooling, and the gas flow was 40 sccm during the period.

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Abstract

The invention relates to a pyramidal molybdenum disulfide nanosheet and a preparation method and an application thereof. The method comprises the following steps: S1) taking a slide glass as a substrate and placing the slide glass in hydrofluoric acid for immersion for 3-5 min, then performing cleaning and removing silicate on a surface to generate a product, drying the product for standby; S2) using a chemical vapor deposition method, taking sublimed sulfur and molybdenum trioxide, molybdenum chloride or ammonium tetrathiomolybdate as a sulfur source and a molybdenum source, and growing molybdenum disulfide on a substrate of a three-temperature zone tubular furnace. The pyramidal molybdenum disulfide nanosheet has an uniform size, has higher density boundary, and has good conductive performance and catalysis performance.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a pyramid-shaped molybdenum disulfide nanosheet and its preparation method and application. Background technique [0002] Energy and the environment are topics that are closely related to us, and the contradiction between people's increasing energy consumption and the resulting environmental pollution is becoming increasingly acute. The development and utilization of clean and recyclable energy, especially hydrogen energy, has found a balance between the two contradictions. At present, the way to produce hydrogen is mostly at the expense of the consumption of fossil fuels, and the environmental problems brought about make this process outweigh the benefits. 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 t...

Claims

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Application Information

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IPC IPC(8): B01J27/051
CPCB01J27/051
Inventor 张璋苏绍强周青伟胡先标
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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