Preparation method of molybdenum disulfide nanosheet in stripping manner

A molybdenum disulfide, nanosheet technology, applied in the directions of molybdenum sulfide, nanotechnology, nanotechnology, etc., can solve the problems of high energy consumption, long preparation process cycle, and the peeling efficiency needs to be further improved, and achieve high efficiency and energy consumption. low effect

Active Publication Date: 2015-04-08
安徽百特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Summarizing the existing exfoliation preparation technology of molybdenum disulfide nanosheets, there are s

Method used

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  • Preparation method of molybdenum disulfide nanosheet in stripping manner
  • Preparation method of molybdenum disulfide nanosheet in stripping manner
  • Preparation method of molybdenum disulfide nanosheet in stripping manner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Disperse 20 mg of molybdenum disulfide powder in 20 ml of N-methyl-2-pyrrolidone mixed solvent containing hydrogen peroxide (NMP: 30% H 2 o 2 The mass ratio of the aqueous solution is 10:1), stirred at 35°C for 10 hours, and then cooled to room temperature. Centrifuge at 5000 rpm for 10 minutes to remove unstripped powder, collect the supernatant, filter and dry. The final exfoliated yield of molybdenum disulfide nanosheets is about 60 wt% (relative to the raw material powder). The scanning electron microscope image of the molybdenum disulfide raw powder before stripping is shown in figure 1 As shown, the atomic force microscopy and transmission electron microscopy images of the exfoliated nanosheets are shown in figure 2 and image 3 As shown in , the atomic force microscope photographs confirm that the height of the sheet is 0.95 nm, which is in line with the height of a typical single-layer molybdenum disulfide nanosheet.

Embodiment 2

[0026] Disperse 20 mg of molybdenum disulfide powder in 20 ml of N-methyl-2-pyrrolidone mixed solvent containing hydrogen peroxide (NMP: 30% H 2 o 2 The mass ratio of the aqueous solution is 100:1), stirred at 35°C for 10 hours, and then cooled to room temperature. Centrifuge at 5000 rpm for 10 minutes to remove unstripped powder, collect the supernatant, filter and dry. The final exfoliation yield of molybdenum disulfide nanosheets is greater than 60 wt% (relative to the raw material powder).

Embodiment 3

[0028] Disperse 100 mg of molybdenum disulfide powder in 20 ml of N-methyl-2-pyrrolidone mixed solvent containing hydrogen peroxide (NMP: 30% H 2 o 2 The mass ratio of the aqueous solution is 10:1), stirred at 35 °C for 10 hours, and then cooled to room temperature. Centrifuge at 5000 rpm for 10 minutes to remove unstripped powder, collect the supernatant, filter and dry. The final exfoliation yield of molybdenum disulfide nanosheets is greater than 30 wt% (relative to the raw material powder).

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Abstract

The invention discloses a preparation method of a molybdenum disulfide nanosheet in a stripping manner. Stirring or ultrasonic treatment is carried out in a mixed solvent containing an oxidizing agent, and a raw material, namely molybdenum disulfide, is stripped, so that the molybdenum disulfide nanosheet is formed. The preparation method of the molybdenum disulfide nanosheet has the advantages that a cheap reagent is adopted, operation is carried out at room temperature, energy consumption is low, no pollution is caused, efficiency is high, and the prepared molybdenum disulfide nanosheet can be widely applied to the fields of energy storage and conversion, catalysis, lubrication, various composite materials and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular provides a preparation method for exfoliating molybdenum disulfide nanosheets with single or few layers and containing defects or holes. Background technique [0002] Molybdenum disulfide can be conveniently extracted and prepared from natural molybdenite, and is widely used in lubrication, catalysis, energy storage and various composite materials. A single molybdenum disulfide sheet is composed of a sandwich structure in which two S atomic layers are sandwiched by a molybdenum atomic layer, with a thickness of about 0.8 to 1.0 nanometers. Molybdenum disulfide sheets have good mechanical properties (Young's modulus 0.33 TPa, fracture strength 23 GPa), in-plane electron mobility up to 200 ~ 500 cm 2 / V.s, very high current switch ratio 10 8 , so it has broad application prospects in flexible electronics, energy storage (lithium-ion batteries, supercapacitors, f...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y30/00B82Y40/00
CPCC01G39/06C01P2004/03C01P2004/04
Inventor 卢红斌董雷林珊李梦雄张佳佳
Owner 安徽百特新材料科技有限公司
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