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Nickel/cobalt-modified molybdenum disulfide nanoflower material as well as synthetic method and application thereof

A technology of molybdenum disulfide and synthesis method, which is applied in chemical instruments and methods, carbon compound catalysts, hydrocarbon production from oxygen-containing organic compounds, etc., can solve the problem of limited number of active sites, poor adjustment of synthesis morphology and small specific surface area. and other problems to achieve the effect of increasing the effective contact area, reducing the phenomenon of stacking and agglomeration, and increasing the specific surface area.

Pending Publication Date: 2019-01-11
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a controllable synthesis of three-dimensional molybdenum disulfide nanostructured molybdenum disulfide modified by nickel / cobalt, aiming at the shortcomings of current molybdenum disulfide catalysts such as small specific surface area, limited number of active sites per unit area, and poor adjustability of synthesis morphology. Flower, a nickel / cobalt modified molybdenum disulfide nanoflower material that effectively improves the hydrodesulfurization / deoxidation performance of molybdenum disulfide catalysts and its synthesis method and application

Method used

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  • Nickel/cobalt-modified molybdenum disulfide nanoflower material as well as synthetic method and application thereof
  • Nickel/cobalt-modified molybdenum disulfide nanoflower material as well as synthetic method and application thereof
  • Nickel/cobalt-modified molybdenum disulfide nanoflower material as well as synthetic method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 2.0 g of ammonium molybdate and 1.64 g of nickel nitrate and dissolve them in 18 mL of water to form a uniform solution. During stirring, add 10 mL of hydrazine hydrate solution (85%) and mix well. Weigh 1.45g of elemental sulfur, add the above solution, and perform ultrasonication for 30min. Then put the obtained mixed solution into a polytetrafluoroethylene-lined container, and put it into an oven for hydrothermal reaction. The hydrothermal temperature is 180°C, and the hydrothermal time is 72h. After the reaction, cooling was performed, and the reacted mixed solution was taken out for separation and washing. The obtained black solid was treated in a vacuum oven at 60° C. for 24 hours, and finally nickel-modified molybdenum disulfide three-dimensional nanoflower material was obtained. The scanning and transmission electron micrographs of the material synthesized by this method are as follows: figure 2 (a) and image 3 (a) shown. It can be seen from the fig...

Embodiment 2

[0026] Example 2 is basically the same as Example 1, except that the amount of each precursor is used: 1.0 g of ammonium molybdate, 0.494 g of nickel nitrate, and 0.725 g of elemental sulfur. The scanning and transmission electron micrographs of the material synthesized by this method are as follows: figure 2 (b) and image 3 (b) shown. It can be seen from the figure that the nickel-modified molybdenum disulfide nanoflowers prepared by this method are uniform in shape, the size of the flower ball is about 260nm, and the thickness of the formed flower flakes is about 5.2nm.

Embodiment 3

[0028] Example 3 is basically the same as Example 1, except that the amount of each precursor is used: 0.5 g of ammonium molybdate, 0.41 g of nickel nitrate, and 0.36 g of elemental sulfur. The scanning and transmission electron micrographs of the material synthesized by this method are as follows: figure 2 (c) and image 3 (c) shown. It can be seen from the figure that the nickel-modified molybdenum disulfide nanoflowers prepared by this method are uniform in shape, the size of the flower bulb is about 150 nm, and the thickness of the formed flower flakes is about 4.0 nm.

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Abstract

The invention discloses a nickel / cobalt-modified molybdenum disulfide nanoflower material as well as a synthetic method and application thereof and relates to molybdenum disulfide nanoflower materials. The element composition of the nickel / cobalt-modified molybdenum disulfide nanoflower material is nickel / cobalt, molybdenum and sulfur, the material presents flower ball-like spherical morphology, the flower ball-like structure is composed of flake structures; the nickel / cobalt is uniformly distributed on the molybdenum disulfide flakes; the nanoflower diameter is 50-800nm; the nano-flake thickness on the flower ball-like structure is 2-10nm. The synthetic method comprises the following steps: dissolving a molybdenum source and a nickel / cobalt source into water to obtain a mixed solution; adding a vulcanizing agent and a reducing agent into the mixed solution, and dispersing to form suspension; transferring the suspension into a hydrothermal reactor, heating, reacting and then cooling; taking out the black solid obtained in the hydrothermal reactor after cooling, performing centrifugal separation, washing, and performing vacuum drying, thus obtaining the nickel / cobalt-modified molybdenum disulfide nanoflower material of different morphology sizes.

Description

technical field [0001] The invention relates to a molybdenum disulfide nano flower material, in particular to a nickel / cobalt modified molybdenum disulfide nano flower material and a synthesis method and application thereof. Background technique [0002] As a typical transition metal layered compound, molybdenum disulfide has a graphene-like hexagonal close-packed layered structure, and molybdenum / sulfur layers exist alternately, forming a sandwich structure like a "sandwich". Linked by strong covalent bonds and ionic bonds, this variable atomic coordination structure and electronic structure make it have excellent catalytic, lubricating and photoelectric properties, and become one of the materials that has attracted much attention. However, conventional bulk molybdenum disulfide has problems such as low specific surface area, uncontrollable morphology, and low number of active sites per unit area, which limit its application in catalysis. Since the performance of sulfide c...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/08B01J35/10C07C1/22C07C15/06
CPCC07C1/22B01J27/051C07C2527/051B01J35/51B01J35/61C07C15/06Y02P20/52
Inventor 赖伟坤宋文静连奕新田应许伊晓东方维平
Owner XIAMEN UNIV
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