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Nolybdenum disulfide nanometer particle, preparation method and application thereof

A technology of molybdenum disulfide and nano-particles, which is applied in the direction of molybdenum sulfide, chemical instruments and methods, nanotechnology, etc., can solve the problems of high production costs, and achieve the effects of low cost, excellent catalytic performance, and good catalytic activity

Inactive Publication Date: 2013-04-03
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two methods have their own advantages and disadvantages, however, in general, they both face the problem of high production costs, especially the chemical vapor deposition method

Method used

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  • Nolybdenum disulfide nanometer particle, preparation method and application thereof
  • Nolybdenum disulfide nanometer particle, preparation method and application thereof
  • Nolybdenum disulfide nanometer particle, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1, preparation molybdenum disulfide nanoparticles

[0038] Commercially available micron-sized molybdenum disulfide particles (2 microns in particle size) were mixed with 1-butyl-3-methylimidazolium hexafluorophosphate to obtain a mixture in which micron-sized molybdenum disulfide particles were mixed with 1 The mass ratio of -butyl-3-methylimidazolium hexafluorophosphate is 1:1; then the mixture is placed in a mortar for grinding, and the grinding time is controlled to be 10 hours; then the ground mixture is used The filter membrane with a pore size of 220nm is filtered and separated to obtain molybdenum disulfide nanoparticles.

[0039] The transmission electron micrograph of the molybdenum disulfide nanoparticles prepared in this embodiment is as follows: figure 1 As shown in the scanning electron micrograph figure 2 It can be seen from the two figures that the particle size of the prepared molybdenum disulfide nanoparticles is 100-200nm.

Embodiment 2

[0040] Embodiment 2, preparation molybdenum disulfide nanoparticles

[0041]Molybdenite, 1-butyl-3-methylimidazolium hexafluorophosphate and DMSO are mixed to obtain a mixture, in which molybdenite and 1-butyl-3-methylimidazolium hexafluorophosphate and The mass ratio of the DMSO mixture is 1:1000 (the mass ratio of 1-butyl-3-methylimidazolium hexafluorophosphate and DMSO is 4:1); then the mixture is placed in a mortar for Grinding, ultrasonic treatment after grinding, controlling the grinding time to 0.5 hours, and ultrasonic time to 3 hours; then the mixture after grinding and ultrasonic is centrifuged, and the remaining large molybdenum disulfide is removed by centrifugation at 4000rpm, and the above The supernatant was centrifuged at a rotational speed of 8000 rpm, and the precipitate at this rotational speed was collected to obtain molybdenum disulfide nanoparticles.

[0042] The transmission electron micrograph of the molybdenum disulfide nanoparticles prepared in this ...

Embodiment 3

[0043] Embodiment 3, preparation molybdenum disulfide nanoparticles

[0044] First, the molybdenite is crushed to obtain a crushed product; then the obtained crushed product is dispersed into water and N-methylpyrrolidone (wherein the mass ratio of water to N-methylpyrrolidone is 1:3) to obtain a mixture, In the mixture, the mass ratio of molybdenite and N-methylpyrrolidone is 1:10000; then the mixture is placed in a plastic cup for ultrasonication, and the ultrasonic time is controlled for 20 hours; then the ground mixture is subjected to Column chromatography separation adopts a silica gel column, the mobile phase is dichloromethane, and the effluent product is collected to obtain molybdenum disulfide nanoparticles.

[0045] The transmission electron micrograph of the molybdenum disulfide nanoparticles prepared in this embodiment is as follows: Figure 5 and Figure 6 It can be seen from the two figures that the particle size of the prepared molybdenum disulfide nanopartic...

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Abstract

The invention discloses a nolybdenum disulfide nanometer particle, a preparation method thereof and an application thereof. The preparation method for the nolybdenum disulfide nanometer particle comprises the following steps: mixing molybdenite or micron-level nolybdenum disulfide with ionic liquid and / or organic solvent to obtain a mixture; grinding and / or ultrasonically processing the mixture; and separating the mixture to obtain the nolybdenum disulfide nanometer particle. The nanometer nolybdenum disulfide provided by the invention has excellent catalytic activity in the hydrodesulfurization reaction, hydrogen evolution reaction and oxidation reaction of methanol. Meanwhile, the nolybdenum disulfide nanometer particle, which is used as a semiconductor nanometer material, has application prospect in photovoltaic conversion and photocatalytic water-splitting. More importantly, the nanometer nolybdenum disulfide has excellent catalytic performances in the oxygen reduction reaction of the nanometer nolybdenum disulfide.

Description

technical field [0001] The invention relates to a molybdenum disulfide nano-particle and its preparation method and application, belonging to the synthesis of nano-materials and the field of catalysis and energy conversion. Background technique [0002] As a layered semiconductor material with a graphene-like structure, molybdenum disulfide has attracted more and more attention, and has shown good application prospects in the field of microelectronics. However, molybdenum disulfide not only has excellent electrical properties, but also has good catalytic activity. As a traditional hydrodesulfurization catalyst, molybdenum disulfide has been used in industry for decades. At the same time, studies in recent years have shown that molybdenum disulfide is also excellent for hydrogen evolution reaction (Hydrogen evolution reaction, HER). The catalytic activity can be used for the acquisition of environmentally friendly hydrogen energy. This makes it have excellent application po...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y30/00B01J27/051H01M4/86
CPCY02E60/50Y02P20/54
Inventor 李美仙王谭源
Owner PEKING UNIV
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