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Lamella accumulated one-dimensional molybdenum disulfide nanometer material and preparation method thereof

A technology of molybdenum disulfide and nanomaterials, which is applied in the direction of molybdenum sulfide, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high price, unfavorable large-scale production, limited reserves of Pt group precious metals, etc., and achieve low cost, Good electrocatalytic activity and high yield

Active Publication Date: 2017-01-04
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For cathodic hydrogen evolution reaction, Pt group noble metals have the best electrocatalytic hydrogen evolution activity, but Pt group noble metals have limited reserves in the earth's crust and are relatively expensive, which is not conducive to large-scale production of catalysts for hydrogen evolution reaction.

Method used

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  • Lamella accumulated one-dimensional molybdenum disulfide nanometer material and preparation method thereof
  • Lamella accumulated one-dimensional molybdenum disulfide nanometer material and preparation method thereof
  • Lamella accumulated one-dimensional molybdenum disulfide nanometer material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of the one-dimensional molybdenum disulfide nanometer material of lamellar stacking, comprises the following steps:

[0036] A, add 0.022g sodium molybdate crystal (Na 2 MoO 4 2H 2 (2), 0.0083g thioglycolic acid, make the atomic molar ratio of Mo and S in sodium molybdate and thioglycolic acid meet 1:1, the concentration of Mo in ultrapure water is controlled at 3mmol / L, obtains mixed solution A, with a volume of 30 mL.

[0037] B. Add 0.5 mL of ammonia water with a mass concentration of 25-28% to the A solution obtained in step 1, stir, and adjust the pH to 11-12 to obtain a mixed solution B;

[0038] C. Transfer the mixed solution B into a polytetrafluoroethylene-lined reaction kettle, place the reaction kettle in a constant temperature box, the reaction temperature is 220°C, and after constant temperature for 18 hours, cool to room temperature;

[0039] D. Centrifuge the solid product in the reaction kettle, wash and centrifuge with e...

Embodiment 2

[0044] A kind of preparation method of the one-dimensional molybdenum disulfide nanometer material of lamellar stacking, comprises the following steps:

[0045] A. Add 0.022g sodium molybdate crystals to ultrapure water, add 0.0166g thioglycolic acid after dissolving, so that the atomic molar ratio of Mo and S in sodium molybdate and thioglycolic acid satisfies 1:2, Mo atoms The concentration in ultrapure water was controlled at 3 mmol / L to obtain mixed solution A with a volume of 30 mL.

[0046] B. Add 0.5 mL of ammonia water with a mass concentration of 25-28% to the A solution obtained in step 1, stir, and adjust the pH to 11-12 to obtain a mixed solution B;

[0047] C. Transfer the mixed solution B into a polytetrafluoroethylene-lined reaction kettle, place the reaction kettle in a thermostat with a reaction temperature of 220°C, keep the temperature for 18 hours, and then cool to room temperature.

[0048] D. Centrifuge the solid product in the reaction kettle, wash and ...

Embodiment 3

[0051] A kind of preparation method of the one-dimensional molybdenum disulfide nanometer material of lamellar stacking, comprises the following steps:

[0052] A. Add 0.029g sodium molybdate crystals and 0.0166g thioglycolic acid in ultrapure water, so that the atomic molar ratio of Mo and S in sodium molybdate and thioglycolic acid meets 1:2, and the Mo atom is in the ultrapure The concentration in water was controlled at 4 mmol / L to obtain mixed solution A with a volume of 30 mL.

[0053] B. Add 1 mL of ammonia water with a mass concentration of 25-28% to the A solution obtained in step 1, stir, and adjust the pH to 11-12 to obtain a mixed solution B;

[0054] C. Transfer the mixed solution B into a polytetrafluoroethylene-lined reaction kettle, place the reaction kettle in a thermostat with a reaction temperature of 180°C, keep the temperature constant for 24 hours, and then cool to room temperature.

[0055] D. Centrifuge the solid product in the reaction kettle, wash an...

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Abstract

The invention provides a lamella accumulated one-dimensional molybdenum disulfide nanometer material and a preparation method thereof. The molybdenum disulfide catalyst material is prepared by adopting a sodium molybdate crystal or an ammonium molybdate tetrahydrate crystal and a mercaptoacetic acid solution to react. Compared with the prior art, the lamella accumulated one-dimensional molybdenum disulfide nanometer material obtained by the invention is used as a catalyst in an electrolysis water hydrogen evolution process, shows excellent catalytic activity, and has a giant potential application value in the field of electrolysis water hydrogen production. In addition, according to the lamella accumulated one-dimensional molybdenum disulfide nanometer material and the preparation method thereof provided by the invention, the controllable preparation of morphology of the catalyst can be realized, the reaction is moderate, and the product yield is high.

Description

technical field [0001] The invention relates to the field of preparation of micro-nano materials, in particular to a sheet-stacked one-dimensional molybdenum disulfide nano-material and a preparation method thereof. Background technique [0002] Molybdenum disulfide is a typical transition metal two-dimensional layered sulfide. A single layer of molybdenum disulfide is composed of S-Mo-S atomic layers in a covalent bond, and the layers are bonded by weak van der Waals forces. . Therefore, molybdenum disulfide has a wide range of applications in the fields of catalysis, lubrication, and battery electrode materials. [0003] Unlike graphene, which has a two-dimensional layered structure, molybdenum disulfide has a tunable bandgap structure. When bulk molybdenum disulfide becomes molybdenum disulfide nanosheets, the forbidden band width of molybdenum disulfide increases with the decrease of its layer number. Therefore, compared with zero-bandgap graphene, single-layer molybd...

Claims

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Application Information

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IPC IPC(8): C01G39/06B01J27/051C25B1/04
CPCB01J27/051C01G39/06C01P2002/72C01P2004/03C01P2004/04C01P2004/50C25B1/04Y02E60/36
Inventor 王伟智徐雅飞
Owner ANHUI NORMAL UNIV
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