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

A technology of metal nanoparticles and molybdenum disulfide, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve the effect of increasing the number

Active Publication Date: 2019-04-19
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Nano-platinum (Pt) metal particles are nano-sized and have a high specific surface area, so they can exhibit many excellent physical and chemical properties, such as catalysis, adsorption, energy storage, etc., but the metal nanoparticles are asymmetrically embedded in two Single-sided molybdenum sulfide nanolayers are still a very challenging problem

Method used

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

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Embodiment 1

[0025] The mass ratio of platinum acetate and molybdenum disulfide powder is 1:3, and the two are uniformly and fully ground in a mortar for 30 minutes, and the mixed powder solid is calcined in flowing air, and the calcining temperature range is controlled at 300 °C, and the calcining time is After 3 hours, the metal salt was decomposed to form platinum metal nanoparticles, which were embedded on the surface of molybdenum disulfide, and cooled naturally to obtain a powder solid, which was dissolved in a round-bottomed flask containing dimethylformyl (DMF), and ultrasonicated in a water bath. The molybdenum disulfide layered material is peeled off under the action, and finally passed through a low-speed centrifuge at ~500×g for 10 minutes to obtain the supernatant, and then passed through a high-speed centrifuge at ~3000×g for 10 minutes to separate the asymmetric single-sided metal platinum nanoparticles Mosaic molybdenum disulfide nanosheets.

[0026] For a fixed observation...

Embodiment 2

[0030] The mass ratio of platinum acetate and molybdenum disulfide powder is 1:5, and the two are uniformly and fully ground in a mortar for 30 minutes, and the mixed powder solid is calcined in flowing air, and the calcining temperature range is controlled at 300 °C, and the calcining time is For 3 hours, the metal salt decomposes to form platinum metal nanoparticles, which are embedded on the surface of molybdenum disulfide, and naturally cooled to obtain a powder solid, which is dissolved in a round bottom flask containing DMF, and the molybdenum disulfide layer is peeled off under the action of ultrasonic waves in a water bath Shaped materials, finally passed through a low-speed centrifuge at ~500×g for 10 minutes to obtain the supernatant, and then passed through a high-speed centrifuge at ~3000×g for 10 minutes to separate the asymmetric single-sided mosaic molybdenum disulfide nanosheets of platinum nanoparticles.

[0031] For a fixed observation area, scanning electron ...

Embodiment 3

[0033] The mass ratio of platinum acetate and molybdenum disulfide powder is 1:15, and the two are evenly and fully ground in a mortar for 30 minutes, and the mixed powder solid is calcined in flowing air, and the calcining temperature range is controlled at 300 ° C, and the calcining time is For 3 hours, the metal salt decomposes to form platinum metal nanoparticles, which are embedded on the surface of molybdenum disulfide, and naturally cooled to obtain a powder solid, which is dissolved in a round bottom flask containing DMF, and the molybdenum disulfide layer is peeled off under the action of ultrasonic waves in a water bath Shaped materials, finally passed through a low-speed centrifuge at ~500×g for 10 minutes to obtain the supernatant, and then passed through a high-speed centrifuge at ~3000×g for 10 minutes to separate the asymmetric single-sided mosaic molybdenum disulfide nanosheets of platinum nanoparticles.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051
CPCB01J27/051B01J27/0515B01J35/396
Inventor 廖云龙樊少娟王辉
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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