CN105060348A - Method for preparing molybdenum disulfide nanosheet through solid-state chemical reaction - Google Patents

Abstract

The invention relates to a method for preparing molybdenum disulfide nanosheets by solid-phase chemical reaction, and belongs to the field of nanomaterial preparation. In the method, the metal molybdenum salt and thioacetamide are mixed and ground at room temperature to prepare two-dimensional molybdenum disulfide nanosheets, and the low-heat solid-phase synthesis of the molybdenum disulfide nanosheets is realized. Different from the synthesis method of conventional molybdenum disulfide nanosheets, this method only uses low-heat solid-phase chemical method to prepare molybdenum disulfide nanosheets through the adjustment of molybdate. The low-heat solid-phase chemical method for preparing molybdenum disulfide nanosheets of the present invention has the characteristics of simple operation, no solvent, high yield, low cost, and simple synthesis process; and the molybdenum disulfide nanosheets prepared by the present invention have large specific surface area and High reactivity will have potential application prospects in photoelectric devices, photocatalysis and other fields.

Description

A method for preparing molybdenum disulfide nanosheets by solid phase chemical reaction

technical field

The invention relates to a method for preparing molybdenum disulfide nanosheets by solid-phase chemical reaction, and belongs to the field of nanomaterial preparation.

Background technique

MoS ₂ (molybdenum disulfide) is a layered two-dimensional material with diamagnetic properties and semiconductor properties. Its crystal structure has three types: 1T, 2H and 3R. The configurations of 1T-MoS ₂ and 3R-MoS ₂ are metastable structures. , usually 2H-MoS ₂ is a stable configuration. Each molybdenum atom in 2H-MoS ₂ is surrounded by six sulfur atoms in a triangular prism shape. There are quite a lot of Mo-S facets, large specific surface area, high surface activity, and low friction coefficient. It is an excellent catalyst and solid lubricant. , are widely used in catalytic materials and lubricating materials. In recent years, researchers have discovered that molybdenum disulfide nanomaterials have strong lubricating and catalytic effects. In addition, due to the small size of nanoscale materials, their interface is in a highly disordered state with neither long-range order nor short-range order, which makes it produce surface effects and small size that bulk materials do not have. Effect, quantum effect, and macroscopic quantum tunneling effect, which are manifested in physical properties such as light, heat, electricity, and magnetism that are different from conventional materials, and thus have attracted great attention.

The performance of a substance has a lot to do with its shape and structure. By studying the relationship between performance and shape, we can further explore various reaction mechanisms. Therefore, the preparation of molybdenum disulfide with different shapes plays a very important role. Among them, two-dimensional nanomaterials have attracted more and more attention due to their various special properties.

The preparation and performance research of molybdenum disulfide nanosheets is a major focus in the field of nanotechnology research today. At present, the methods for preparing molybdenum disulfide nanosheets mainly include hydrothermal or solvothermal methods, microemulsion methods, co-precipitation methods and other technologies. The solid-phase chemical synthesis method does not use solvents, has the advantages of high selectivity, high yield, and simple process, and has become an important method for synthesizing nanomaterials.

Contents of the invention

The purpose of the present invention is to provide a method for preparing molybdenum disulfide nanosheets, which uses a solid-phase chemical reaction process to prepare molybdenum disulfide nanosheets by adjusting metal molybdenum salts, which provides a simpler method for the synthesis of molybdenum disulfide nanosheets. method of preparation.

The invention discloses a method for preparing molybdenum disulfide nanosheets in solid state. The invention uses metal molybdenum salt and thioacetamide as reactants, reacts through grinding at room temperature, and then prepares two-dimensional molybdenum disulfide nanosheets.

The invention realizes the synthesis of molybdenum disulfide nanosheets by using a solid-phase synthesis process, has simple operation, low cost, and is environmentally friendly, and provides a new idea for the preparation of molybdenum disulfide nanosheets.

Description of drawings

Figure 1 is a transmission electron microscope image of the prepared molybdenum disulfide nanosheets.

Detailed ways

The solid-phase chemical synthesis of molybdenum disulfide nanosheets is carried out in the following steps:

Embodiment 1: Accurately weigh 0.01 mole of ammonium molybdate and place it in an agate mortar, grind it thoroughly and add 0.02 mole of thioacetamide, mix and grind quickly, and continue grinding for 60 minutes to ensure that the reaction is fully carried out. Wash it with deionized water and absolute ethanol, filter it with suction, and dry it in a drying oven at 60 degrees for 2 hours to obtain molybdenum disulfide nanomaterials.

Specific embodiment 2: Accurately weigh 0.01 mole of sodium molybdate and place it in an agate mortar, grind it thoroughly and add 0.02 mole of thioacetamide, mix and grind quickly, and continue grinding for 60 minutes to ensure that the reaction is fully carried out. Wash it with deionized water and absolute ethanol, filter it with suction, and dry it in a drying oven at 60 degrees for 2 hours to obtain molybdenum disulfide nanomaterials.

Claims (1)

1. A method for preparing molybdenum disulfide nanosheets by solid-phase chemical reaction is characterized in that metal molybdenum salt and thioacetamide are mixed with a mol ratio of 1:2, and two-dimensional molybdenum disulfide nanosheets are prepared after sufficient reaction piece.