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Preparation method for molybdenum disulfide nanosheets at normal pressure

A molybdenum disulfide, nanosheet technology, applied in the direction of molybdenum sulfide, nanotechnology, nanotechnology, etc.

Inactive Publication Date: 2014-05-28
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many theoretical and practical basic scientific problems to be solved in the study of molybdenum disulfide films with two-dimensional layered nanostructures: The "top-down" stripping method based on ultrasonic method or the "bottom-up" synthesis method represented by high-temperature thermal decomposition has yet to be perfected. How to improve the preparation method of molybdenum disulfide thin film in order to realize the preparation Simple process, high preparation efficiency, good repeatability and mass production are still the current research focus; in terms of structural characterization and photophysical properties, it is of great significance to find a fast, accurate and non-destructive sample structure characterization method

Method used

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  • Preparation method for molybdenum disulfide nanosheets at normal pressure
  • Preparation method for molybdenum disulfide nanosheets at normal pressure
  • Preparation method for molybdenum disulfide nanosheets at normal pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh out 200 mg of commercially purchased MoCl 5 Place in a square ceramic boat, and place the ceramic boat in the middle of a horizontal tube furnace with a length of 90cm, weigh 0.5g of sulfur powder and place it in another square ceramic boat, and place the ark in a horizontal tube furnace At 18cm of the argon inlet, seal the horizontal tube furnace and evacuate it, fill it with argon and keep the flow rate at 50sccm, raise the temperature to 600°C, keep the temperature for 30min, and finally cool naturally to room temperature under the protection of argon Collect the resulting product in a ceramic boat from the molybdenum chloride feedstock.

Embodiment 2

[0012] Weigh out 200 mg of commercially purchased MoCl 5 Place in a square ceramic boat, and place the ceramic boat in the middle of a horizontal tube furnace with a length of 90cm, weigh 0.5g of sulfur powder and place it in another square ceramic boat, and place the ark in a horizontal tube furnace At 16cm of the argon inlet, seal the horizontal tube furnace and vacuumize it, fill it with argon and keep the flow rate at 50sccm, raise the temperature to 600°C, keep the temperature for 30min, and finally cool naturally to room temperature under the protection of argon. Collect the resulting product in a ceramic boat from the molybdenum chloride feedstock.

Embodiment 3

[0014] Weigh out 200 mg of commercially purchased MoCl 5 Place in a square ceramic boat, and place the ceramic boat in the middle of a horizontal tube furnace with a length of 90cm, weigh 0.5g of sulfur powder and place it in another square ceramic boat, and place the ark in a horizontal tube furnace At 20cm from the argon inlet, seal the horizontal tube furnace and vacuumize it, fill it with argon and keep the flow rate at 50sccm, raise the temperature to 600°C, keep the temperature for 30min, and finally cool naturally to room temperature under the protection of argon Collect the resulting product in a ceramic boat from the molybdenum chloride feedstock.

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Abstract

The invention aims to provide a preparation method for a great amount of molybdenum disulfide nanosheets at a normal pressure. The specific steps are as follows: weighing a certain amount of commercially purchased molybdenum pentachloride (MoCl5); placing the molybdenum pentachloride (MoCl5) in a square ceramic boat and placing the ceramic boat at the middle part of a horizontal tube type furnace with a length of 90 cm; weighing a certain amount of powdered sulfur and placing the powdered sulfur into the other square ceramic boat; placing the square boat at the entrance of argon gas of the horizontal tube type furnace; sealing the horizontal tube type furnace and vacuumizing the horizontal tube type furnace; filling the furnace with the argon gas and maintaining certain flow velocity; increasing the temperature to the preset temperature and keeping the temperature for 30 min; finally, under the protection of the argon gas, naturally cooling off the temperature to a room temperature; collecting and obtaining the molybdenum disulfide nanosheets from the ceramic boat loaded with the raw materials of molybdenum pentachloride.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanomaterials and their preparation, and relates to a method for preparing molybdenum disulfide nanosheets. Background technique [0002] Molybdenum disulfide (MoS 2 ) is a chalcogenide material with diamagnetic and semiconductor properties, belonging to the hexagonal crystal system. Nanostructured MoS 2 It has been further improved in many performances, which are highlighted in the following aspects: large specific surface area, strong adsorption capacity, high reactivity, and its catalytic performance, especially the performance of catalytic hydrodesulfurization, is stronger, which can be used to prepare special catalytic materials and storage materials. Gas materials, see: Inorganic nanotubes And fullerene-like materials, R.Tenne, Nature Nanotech., 2006,1,103-111; Nano-MoS 2 The energy band difference of the thin layer is close to 1.78eV, which matches the energy of light, and has appl...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y30/00B82Y40/00
Inventor 简基康王丰超吴荣
Owner XINJIANG UNIVERSITY
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