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Method for preparing few-layer MoS2 nanosheets

A nanosheet, volume ratio technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as difficulty in nanosheet preparation, and achieve high product purity, simple operation, and good repeatability. Effect

Inactive Publication Date: 2015-05-13
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0004] The object of the present invention is to provide a method for preparing few-layer MoS 2 Nanosheet approach for addressing MoS 2 Difficult issues in the preparation of nanosheets, and for MoS 2 Nanosheets lay the foundation for expanding applications in other fields

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  • Method for preparing few-layer MoS2 nanosheets
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  • Method for preparing few-layer MoS2 nanosheets

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Embodiment Construction

[0014] The preparation method of the present invention is as follows: respectively prepare four parts of 100 milliliters of ethanol solutions with proportions of 25%, 30%, 40% and 45% respectively, place them in a 250ml three-necked flask, and weigh four parts of 0.1 gram of MoS 2 The powders were respectively put into the above mixed solution, and then the three-necked flask was placed in a water bath to raise the temperature and reflux, and when the temperature reached 80°C, it lasted for 3 hours, and then naturally cooled to room temperature. The mixed solution was centrifuged at 2000 rpm (rev / min) for 20 minutes, and the supernatant was taken, filtered through an organic filter with a pore size of 0.22 micron, and dried at 60°C for 12 hours to obtain the target product.

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Abstract

The invention discloses a method for preparing few-layer MoS2 nanosheets. The method comprises the following steps: preparing 100ml of 3% ethanol solution and placing the ethanol solution in 250ml of a three-mouth flask, weighing 0.1g of MoS2 powder and pouring the MoS2 powder in the mixed solution; placing the three-mouth flask in a water bath and heating to flow back, and continuously and naturally cooling the three-mouth flask to a room temperature for 2-4 hours when a temperature achieves 75-85 DEG C; centrifuging the mixed solution for 20 minutes at a certain rotational speed, taking the supernatant, carrying out suction filtration by using an organic filtration membrane, and drying for 12 hours at 60 DEG C to obtain a target product. The method disclosed by the invention has the following advantages that the problem of difficult preparation for the MoS2 nanosheets is solved, and a foundation is laid for the application expansions of the MoS2 nanosheets in other fields; the few-layer MoS2 nanosheets disclosed by the invention are prepared by using a method of mixed solvent backflow stripping, and the method disclosed by the invention is simple to operate, low in production cost, high in product purity, good in repeatability, and suitable for the requirements of expanded production.

Description

technical field [0001] The invention relates to a novel liquid phase exfoliated MoS 2 powder, few-layer MoS 2 Preparation methods of nanosheets. Background technique [0002] MoS 2 It is a graphene-like material with a "sandwich sandwich" layered structure composed of a hexagonal single-layer or multi-layer molybdenum disulfide. Single-layer MoS 2 It consists of three atomic layers, the middle layer is the molybdenum atomic layer, and the upper and lower two layers are the sulfur atomic layer. Several monolayer MoS 2 Superposition constitutes bulk MoS 2 , there are weak van der Waals forces between layers. Compared to bulk MoS 2 , single-layer MoS 2 It has the characteristics of large specific surface area, many exposed active sites, and transformation into a direct band gap semiconductor, and its photoelectric properties are relatively prominent, so single-layer MoS 2 It has broad application prospects in optoelectronic devices such as secondary batteries, fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
CPCB82Y30/00C01G39/06C01P2002/72C01P2004/01C01P2004/36C01P2004/61C01P2004/64
Inventor 邢秋菊包少魁熊华萍占玉霞邹建平罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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