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A method for synthesizing molybdenum disulfide monolayer nanosheets by spatial confinement method

A technology of molybdenum disulfide and nanosheets, applied in the direction of molybdenum sulfide, etc., can solve the problems of complex process, high cost and high equipment requirements

Active Publication Date: 2019-10-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the invention adopts the chemical vapor deposition method, which has high cost, relatively complicated process and high equipment requirements, making it difficult to realize large-scale industrial application

Method used

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  • A method for synthesizing molybdenum disulfide monolayer nanosheets by spatial confinement method
  • A method for synthesizing molybdenum disulfide monolayer nanosheets by spatial confinement method
  • A method for synthesizing molybdenum disulfide monolayer nanosheets by spatial confinement method

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Experimental program
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Effect test

Embodiment 1

[0062] A method for synthesizing molybdenum disulfide single-layer nanosheets by space confinement method, comprising steps:

[0063] (1) Preparation of MoS by structure reconstruction method 4 2- Intercalated LDHs complex. Take 1000ml deionized water, 34g (0.1326mol) Mg(NO 3 ) 2 ·6H 2 O, 25g (0.0666mol) Al(NO 3 ) 3 9H 2 O and (1mol) 60g of urea were added to a three-necked flask, stirred at room temperature for 0.5h to dissolve the solid, and refluxed in an oil bath at 90°C for 24h. After filtration, washing, and drying at 60°C for 12 hours, CO 3 - intercalated LDHs, and then CO 3 - The intercalated LDHs were calcined in a muffle furnace at 400 °C for 2 h to obtain the metal oxide MMO. Weigh 2.0g MMO and 4.0g (NH 4 ) 2 MoS 4 Put into 10ml of degassed deionized water and stir for 24h under the protection of nitrogen. Then the dispersion was filtered, washed, and dried at 60°C for 12 hours to obtain MoS 4 2- Intercalated LDHs complex.

[0064] (2) 2gMoS 4 2- ...

Embodiment 2

[0073] A method for synthesizing molybdenum disulfide single-layer nanosheets by space confinement method, comprising steps:

[0074] (1) Preparation of MoS by ion exchange method 4 2- Intercalated LDHs complex. Take 5.1g (0.0198mol) Mg(NO 3 ) 2 ·6H 2 O and 3.8g (0.01mol) Al(NO 3 ) 3 9H 2 O was dissolved in 100ml deionized water to obtain solution A. Take 3.2g NaOH and dissolve in 100ml deionized water to obtain solution B. Under the protection of nitrogen, add solution A and solution B dropwise to 50ml of degassed deionized water at the same time under the condition of stirring, and control the final pH to 10.0, stir at room temperature for 30min; then place it in an oven at 80°C for 12h under the protection of nitrogen . After filtration, washing, and vacuum drying at 60°C for 12 hours, NO 3 - Intercalated LDHs. Weigh 1.0 g of prepared LDHs and 1.0 g (NH 4 ) 2 MoS 4 Add 10 ml of degassed deionized water, N 2 Under protection, stir at 40°C for 24h. MoS was o...

Embodiment 3

[0079] A method for synthesizing molybdenum disulfide single-layer nanosheets by space confinement method, comprising steps:

[0080] (1) Preparation of MoS by co-precipitation method 4 2- Intercalated LDHs complex. Take 5.1g (0.0198mol) Mg(NO 3 ) 2 ·6H 2 O and 3.8g (0.01mol) Al(NO 3 ) 3 9H 2 O was dissolved in 100ml deionized water to obtain solution G. Take 3.2g (0.08mol) sodium hydroxide and 2.6g (0.01mol) (NH 4 ) 2 MoS 4 Dissolve in 100ml deionized water to obtain solution H. Under the protection of nitrogen, solution G and solution H were added dropwise to 50ml degassed deionized water simultaneously under stirring condition, stirred at room temperature for 30min, and the final pH was controlled to be 10.0. Then place it in an oven at 80°C for 12 hours under the protection of an inert gas, filter, wash, and vacuum dry at 60°C for 12 hours to obtain MoS 4 2- intercalated LDHs complex

[0081] (2) 5gMoS 4 2- The intercalated LDHs composite powder was placed...

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Abstract

The invention provides a method for synthesizing molybdenum disulfide single-layer nanometer sheets by a space limited range method. The method comprises the following steps of preparing MoS4<2-> intercalation LDHs compound; the obtained MoS4<2-> intercalation LDHs compound is roasted under the inert gas protection to obtain MoS2 single-layer nanometer sheet / mixed metal oxide (MMO) compounds; theMMO is removed to obtain the MoS2 single-layer nanometer sheets. The method is simple; the cost is low; the realization is easy; the yield is high; the MoS2 single-layer nanometer sheet rate is high;the industrial application is easy.

Description

technical field [0001] The invention relates to a method for synthesizing molybdenum disulfide single-layer nanosheets by a space confinement method, belonging to the field of two-dimensional nanomaterial preparation. Background technique [0002] Transition metal dichalcogenides have great application potential in the fields of photocatalysts, electrocatalysts, and energy storage materials. MoS 2 Single-layer nanosheets have attracted much attention due to their direct bandgap structure (~1.9eV), high current-on-off ratio, and superior field-effect electron mobility. MoS 2 The performance of monolayer nanosheets is significantly better than that of their multilayer counterparts, but their large-scale, high-yield fabrication remains challenging. Typical preparation of MoS 2 The methods for single-layer nanosheets can be classified into four categories: mechanical exfoliation, liquid-phase ultrasonic exfoliation, chemical vapor deposition, and lithium intercalation-assist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/06
Inventor 侯万国王德良李海平杜娜
Owner SHANDONG UNIV
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