A kind of synthesis method of molybdenum disulfide nanosheets embedded in asymmetric single side of metal nanoparticles

Abstract

The invention provides a method for synthesizing molybdenum disulfide nanosheets with symmetrical single-sided inlaying of metal nanoparticles, which includes the following steps: (1) Mix metal salt powder materials and molybdenum disulfide powder materials in a mass ratio of 1:3-1: 50 for full grinding and mixing; (2) Place the mixed powder in flowing air for calcination, the metal salt decomposes to generate metal nanoparticles, which are embedded on the surface of molybdenum disulfide, and naturally cooled to obtain a composite; (3) Dissolve the composite In the solvent, the molybdenum disulfide layered material is peeled off under the action of water bath ultrasonic; then it is centrifuged to obtain the supernatant liquid, and then the supernatant liquid is centrifuged to separate the metal nanoparticle-embedded molybdenum disulfide nanosheets. Molybdenum disulfide nanosheets are only inlaid with metal nanoparticles on one side, and the size distribution of the nanoparticles is narrow and controllable, thereby regulating the band gap of molybdenum disulfide and destroying the symmetry of molybdenum disulfide, thereby changing its electronic structure and increasing the Number of active sites.

Description

technical field

[0001] The invention belongs to the field of nanocomposite materials, and in particular relates to a method for asymmetrically one-sided embedding of metal nanoparticles into molybdenum disulfide nanosheets. Background technique

[0002] The development of human beings has an increasingly urgent demand for new green energy materials. Compared with traditional fossil energy, hydrogen energy is produced as zero-pollution water, which is generally considered to be one of the most potential future energy sources. At present, the use of electrochemical catalytic method (Hydrogen Evolution Reaction, HER) to convert solar energy into hydrogen energy is one of the effective methods for the development of future green energy. In order to obtain a larger current density at a lower overpotential, the electrochemical catalytic method mainly uses the noble metal platinum as a catalyst. However, the precious metal platinum is expensive. Due to the consideration of cost an...

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