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Synthesis method of metal nanoparticle asymmetrical single-face inlayed molybdenum disulfide nanosheet

A technology of metal nanoparticles, 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: 2017-07-21
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

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  • Synthesis method of metal nanoparticle asymmetrical single-face inlayed molybdenum disulfide nanosheet
  • Synthesis method of metal nanoparticle asymmetrical single-face inlayed molybdenum disulfide nanosheet

Examples

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Embodiment 1

[0025] The mass ratio of platinum acetate and molybdenum disulfide powder is 1:3, the two are uniformly and fully ground in a mortar for 30 minutes, and the mixed powder solid is calcined in flowing air. 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 sonicated in a water bath. The molybdenum disulfide layered material was peeled off under the action, and finally passed through a low-speed centrifuge ~500 × g for 10 minutes to obtain the supernatant, and then passed through a high-speed centrifuge ~3000 × g for 10 minutes to separate the asymmetric single-sided metal platinum nanoparticles Inlaid molybdenum disulfide nanosheets.

[0026] For a fixed observation area, scanning electron microscopes and transmission electron microscopes such as figure 1 As sh...

Embodiment 2

[0030] The mass ratio of platinum acetate and molybdenum disulfide powder is 1:5, the two are uniformly and fully ground in a mortar for 30 minutes, and the mixed powder solid is calcined in flowing air. After 3 hours, the metal salt was decomposed to form platinum metal nanoparticles, which were embedded on the surface of molybdenum disulfide. After natural cooling, a powder solid was obtained, which was dissolved in a round-bottomed flask containing DMF, and the molybdenum disulfide layer was peeled off under the action of ultrasonic waves in a water bath. Finally, the supernatant was obtained by a low-speed centrifuge at ~500 × g for 10 minutes, and then passed through a high-speed centrifuge at ~3000 × g for 10 minutes to separate the metal platinum nanoparticles asymmetric single-sided inlaid molybdenum disulfide nanosheets.

[0031] For a fixed observation area, scanning electron microscopes and transmission electron microscopes such as figure 1 As shown in c and d, plat...

Embodiment 3

[0033] The mass ratio of platinum acetate and molybdenum disulfide powder is 1:15, the two are uniformly and fully ground in a mortar for 30 minutes, and the mixed powder solid is calcined in flowing air. After 3 hours, the metal salt was decomposed to form platinum metal nanoparticles, which were embedded on the surface of molybdenum disulfide. After natural cooling, a powder solid was obtained, which was dissolved in a round-bottomed flask containing DMF, and the molybdenum disulfide layer was peeled off under the action of ultrasonic waves in a water bath. Finally, the supernatant was obtained by a low-speed centrifuge at ~500 × g for 10 minutes, and then passed through a high-speed centrifuge at ~3000 × g for 10 minutes to separate the metal platinum nanoparticles asymmetric single-sided inlaid molybdenum disulfide nanosheets.

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Abstract

The invention provides a synthesis method of a metal nanoparticle asymmetrical single-face inlayed molybdenum disulfide nanosheet. The synthesis method comprises the following steps that 1, a metal salt powder material and molybdenum disulfide powder material are fully grinded and mixed according to the mass ratio of 1:3 to 1:50; 2, the mixed powder is put in flowing air for calcination, metal salt is decomposed to generate metal nanoparticles, the metal nanoparticles are inlayed on a molybdenum disulfide surface, and natural cooling is performed to obtain a complex; 3, the complex is dissolved in a solvent, and a molybdenum disulfide stratified material is stripped under the ultrasonic effect of a water bath, then the complex is centrifuged to obtain supernatant liquid, the supernatant liquid is centrifugally separated to obtain the metal nanoparticle inlayed molybdenum disulfide nanosheet. The molybdenum disulfide nanosheet is inlayed with the metal nanoparticles on one single face, the metal nanoparticles are narrower and adjustable in size distribution, accordingly the band gap of molybdenum disulfide is adjustable and controllable, the symmetry of molybdenum disulfide is destroyed, accordingly its electronic structure is changed, and meanwhile the number of active sites is increased.

Description

technical field [0001] The invention belongs to the field of nano-composite materials, and in particular relates to a method for asymmetric single-sided inlaying of metal nano-particles into molybdenum disulfide nano-sheets. Background technique [0002] Human development has an increasingly urgent demand for new green energy materials. Compared with traditional fossil energy, water with zero pollution from hydrogen energy 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 to develop future green energy. In order to obtain a large current density at a low overpotential, electrochemical catalytic methods mainly use the noble metal platinum as a catalyst. However, the precious metal platinum is expensive. Considering the cost and its content in the earth, the development of low-cos...

Claims

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Application Information

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Patent Type & Authority Applications(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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