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Less-layer MoS2 nano-sheet preparation method

A technology of nanosheets and intercalation agent, which is applied in the field of microwave lithium ion intercalation to prepare few-layer MoS2 nanosheets, can solve the problems of long time and complicated preparation process, and achieves high temperature, simple preparation process and efficient energy utilization. Effect

Inactive Publication Date: 2017-07-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent uses a pure chemical etching method to prepare few-layer MoS 2 , although the prepared few-layer MoS 2 The surface damage is small, but its preparation process is relatively complicated and time-consuming

Method used

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  • Less-layer MoS2 nano-sheet preparation method
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  • Less-layer MoS2 nano-sheet preparation method

Examples

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Embodiment 1

[0037] Preparation of Few-Layer MoS by Microwave Li-ion Intercalation and Exfoliation 2 The method of nanosheets comprises the following steps: adding 1.14g of lithium hydroxide monohydrate, 0.2g of block molybdenum sulfide and 60mL of ethylene glycol solvent into a beaker, heating in a water bath at 70°C for 25min, then transferring to a domestic microwave oven and heating at 240w 10min, stop for 3min, finish heating for 30min, cool to room temperature with the furnace, centrifuge at a speed of 2000r / min for 7min, then extract the suspension in the upper layer, and then centrifuge at a speed of 10000r / min, wash with acetone during this period, and then wash clean The final black product was dispersed in deionized water and stripped for 45 minutes, filtered with a porous polyvinylidene fluoride filter membrane (pore size of 0.45 μm), and finally the filtered product was placed in a vacuum oven at 70°C for 9 hours to obtain few-layer MoS 2 Nanosheets.

[0038] figure 1For th...

Embodiment 2

[0043] A few-layer MoS 2 The preparation method of the nanosheets comprises the following steps: adding 0.8g lithium hydroxide monohydrate, 0.25g massive molybdenum sulfide and 60mL ethylene glycol solvent into a beaker, heating in a water bath at 70°C for 25min, and mixing the three evenly; Transfer the beaker to a microwave oven for heating. The power of the microwave oven is 200W. The heating program is carried out by heating for 10 minutes and stopping for 3 minutes until the total heating time is 30 minutes. After the microwave heating is completed, it is cooled to room temperature with the furnace; and then the black product is obtained after microwave heating. Centrifuge at a speed of 2000r / min for 6min, then extract the supernatant suspension, and then centrifugally wash with acetone at a speed of 8000r / min. The black product after washing is dispersed in deionized water and ultrasonically stripped for 30min; The polyvinylidene fluoride filter membrane (pore size is 0....

Embodiment 3

[0045] A few-layer MoS 2 The preparation method of the nanosheets comprises the following steps: adding 1.14g of lithium hydroxide monohydrate, 0.3g of massive molybdenum sulfide and 60mL of ethylene glycol solvent into a beaker, heating in a water bath at 60°C for 35min, and mixing the three evenly; then Transfer the beaker to a microwave oven for heating. The power of the microwave oven is 300W. The heating program is carried out by heating for 10 minutes and stopping for 3 minutes until the total heating time is 30 minutes. After the microwave heating is completed, it is cooled to room temperature with the furnace; and the black product is obtained after microwave heating. Centrifuge at a speed of 2500r / min for 10min, then extract the supernatant suspension, and then centrifugally wash it with acetone at a speed of 12000r / min. The black product after washing is dispersed in deionized water and ultrasonically stripped for 60min; The polyvinylidene fluoride filter membrane (p...

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Abstract

The present invention relates to a less-layer MoS2 nano-sheet preparation method, which comprises: (1) adding a lithium ion intercalation agent, molybdenum sulfide and a solvent to a reaction container, and carrying out water bath heating to obtain a water bath heating product; (2) carrying out microwave heating on the water bath heating product obtained in the step (1) , and cooling to obtain a black product; (3) separating the black product obtained in the step (2), washing, dispersing in deionized water, and peeling; and (4) filtering the peeled product obtained in the step (3), and drying to obtain the less-layer MoS2 nano-sheets. Compared to the preparation method in the prior art, the preparation method of the present invention has advantages of efficient energy source utilization, simple and easy-performing preparation process, short preparation time, high yield, and the like.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a method for preparing few-layer MoS by microwave lithium ion intercalation 2 nanosheet method. Background technique [0002] Since the two scientists of the University of Manchester, Andre Jem and Kostya Novoselov, successfully stripped graphene in 2004, graphene materials have been widely used in lithium-ion batteries due to their excellent electrical, optical, and mechanical properties. There are great applications in batteries, sensors and so on. However, intrinsic graphene has no band gap, which limits its applications in electronic and optoelectronic devices. This has led to the study of new two-dimensional materials, mainly transition metal dichalcogenides (MoS 2 、WS 2 、TiS 2 etc., transition metal oxide TiO 2 etc., and boron nitride similar to graphite, etc., are typical non-graphene two-dimensional materials, among which transition metal dichalcogenides are the m...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G39/06C01P2002/72C01P2004/04C01P2004/20C01P2004/64
Inventor 蔡克峰唐贵
Owner TONGJI UNIV
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