Supported single-layer and few-layer two-dimensional transition metal sulfide catalyst and preparation method thereof

A transition metal and sulfide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems affecting activity, achieve mild conditions, improve dispersion, and avoid shielding effects

Active Publication Date: 2020-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the additives added during the preparation process may remain on the active surface of the material and affect its activity. Therefore, it is necessary to develop a preparation method without additives, and adjust the structure of the prepared material through the selection of raw materials and conditions to optimize performance.
So far, there are no public reports on the preparation of supported monolayer and few-layer two-dimensional transition metal sulfide catalysts using glutathione as a sulfur precursor.

Method used

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  • Supported single-layer and few-layer two-dimensional transition metal sulfide catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 50mg of graphene oxide, add 50ml of deionized water, and ultrasonically disperse to obtain a dispersion of graphene oxide; add 0.035mmol of ammonium paratungstate and 2.1mmol of glutathione under stirring and dissolve; transfer the resulting solution to a 100ml high-pressure reactor , hydrothermally reacted at 200°C for 12h, cooled and filtered with suction, the precipitate was washed with deionized water and then dried in vacuum at 80°C overnight to obtain a black powder product. XRD characterization results show that the obtained product contains tungsten disulfide phase. TEM images (see figure 1 ) shows that tungsten disulfide presents a sheet-like structure with mostly less than 5 layers, and is more uniformly loaded on the carrier sheet. The obtained materials are supported single-layer and few-layer two-dimensional transition metal sulfide catalysts.

Embodiment 2

[0030] Weigh 80mg g-C 3 N 4 , add 50ml deionized water, ultrasonically disperse to obtain g-C 3 N 4 Add 0.035mmol ammonium paratungstate and 2.1mmol glutathione under stirring and dissolve; transfer all the obtained solution to a 100ml high-pressure reactor, react with water at 240°C for 12h, suction filter after cooling, and use deionized water for precipitation After washing, it was vacuum dried overnight at 80° C. to obtain a black powder product. XRD characterization results showed that the obtained product contained tungsten disulfide. TEM images show that tungsten disulfide presents a lamellar structure of 2-4 layers loaded on the carrier. The obtained materials are supported single-layer and few-layer two-dimensional transition metal sulfide catalysts.

Embodiment 3

[0032]Weigh 50mg of graphene oxide, add 50ml of deionized water, add 0.06mmol of ammonium metavanadate and 2.1mmol of glutathione under stirring and dissolve; transfer all the obtained solution to a 100ml autoclave for hydrothermal reaction at 180°C After cooling for 12 hours, filter with suction, wash the precipitate with deionized water and dry it under vacuum at 70°C overnight to obtain a black powder product. XRD characterization results showed that the obtained product contained vanadium disulfide. TEM images show that tungsten disulfide presents a lamellar structure of 2-4 layers loaded on the carrier. The obtained materials are supported single-layer and few-layer two-dimensional transition metal sulfide catalysts.

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Abstract

The invention discloses a supported single-layer and few-layer two-dimensional transition metal sulfide catalyst and a preparation method thereof. According to the method, water is used as a solvent and mixed with a carrier, a soluble metal precursor and glutathione, and the supported single-layer and few-layer two-dimensional transition metal sulfide catalyst is prepared through one-step hydrothermal synthesis at the temperature of 160-240 DEG C. The process is easy to implement; and the prepared catalyst is small in single-layer and few-layer two-dimensional transition metal sulfide size andgood in dispersity, and the average stacking layer number is 1-10. The obtained catalyst has application prospects in the aspects of hydrogenation, hydrogen production, electrochemical sensing, secondary batteries and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer catalysts, and relates to a supported single-layer and few-layer two-dimensional transition metal sulfide catalyst and a preparation method thereof. Background technique [0002] Two-dimensional transition metal sulfides such as niobium disulfide, vanadium disulfide, and tungsten disulfide have relatively stable chemical properties and have a lamellar crystal structure. The structure of a single layer of niobium disulfide, vanadium disulfide, and tungsten disulfide is two layers of sulfur atoms. There is a weak van der Waals force between a layer of metal atoms and another single layer of sulfur atoms, which is easy to insert small molecules or ions or even peel off each other. Single-layer and few-layer nano-niobium disulfide, vanadium disulfide, and tungsten disulfide have unique energy band structure and surface composition, and have good optical, electronic, and mechanical properties. They a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/047B01J27/24B01J27/04
CPCB01J27/047B01J27/24B01J27/04Y02E60/36
Inventor 田志坚郑安达王冬娥刘浩吕广
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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