A kind of composite nanocatalyst of mxene and transition metal sulfide based on fiber skeleton and preparation method thereof

A nano-catalyst and transition metal technology, which is applied in the fields of energy and catalysis and nano-materials, can solve the problems of reducing the loading area of ​​molybdenum disulfide nano-sheets, affecting the electrocatalytic performance, and easy stacking of MXene sheets, which is beneficial to electrochemical catalysis. , Increase the effective load surface area, the effect of green process

Active Publication Date: 2022-02-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lan Huang et al. prepared MXene composite catalysts loaded with molybdenum disulfide, which showed good electrocatalytic activity, but the MXene sheets have the disadvantage of easy stacking, which reduces the loading area of ​​molybdenum disulfide nanosheets and affects its electrocatalysis. performance

Method used

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  • A kind of composite nanocatalyst of mxene and transition metal sulfide based on fiber skeleton and preparation method thereof
  • A kind of composite nanocatalyst of mxene and transition metal sulfide based on fiber skeleton and preparation method thereof
  • A kind of composite nanocatalyst of mxene and transition metal sulfide based on fiber skeleton and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of preparation method of MXene based on fiber skeleton and transition metal sulfide composite nano-catalyst, comprises the steps:

[0048] (1) Weigh 1g polyacrylonitrile (PAN, molecular weight is 10 4 ) was dissolved in 20g of N,N-dimethylformamide (DMF), and after being completely dissolved, 5mL was placed in a syringe, electrospun at a voltage of 28kv, and the spun fiber membrane was removed after 5h;

[0049] (2) Weigh 0.6g titanium carbide powder (etched and dried Ti 3 C 2 ) into 30mL of deionized water, ultrasonically dissolved to uniformly obtain a titanium carbide dispersion, then add 0.06g of ammonium tetrathiomolybdate for dissolution, and at room temperature, immerse the spinning fiber membrane described in step (1) in the solution under a nitrogen atmosphere Take out and dry after 1h to obtain impregnated membrane;

[0050] (3) Under the protection of argon, place the impregnated film of step (2) in a high-temperature furnace, place 0.06g of sulfur ...

Embodiment 2

[0052] A kind of preparation method of MXene based on fiber skeleton and transition metal sulfide composite nano-catalyst, comprises the steps:

[0053] (1) take by weighing 5g polyacrylonitrile (PAN, molecular weight is 10 4 ) was dissolved in 20g of N,N-dimethylformamide (DMF). After complete dissolution, 5mL was placed in a syringe, electrospun at a voltage of 28kv, and the spun fiber membrane was removed after 5h.

[0054] (2) Weigh 0.45g titanium carbide powder (Ti 3 C 2 ) was added into 30mL deionized water, ultrasonically dissolved to obtain a titanium carbide dispersion, and then 0.064g ammonium molybdate was added to dissolve, at room temperature, the spinning fiber membrane described in step (1) was immersed in the solution for 5h under a nitrogen atmosphere and then taken out Dried to obtain impregnated membrane;

[0055] (3) Under the protection of argon, place the impregnated film of step (2) in a high-temperature furnace, place 0.128g of sulfur powder upstream...

Embodiment 3

[0057] A kind of preparation method of MXene based on fiber skeleton and transition metal sulfide composite nano-catalyst, comprises the steps:

[0058] (1) Weigh 3.53g polyacrylonitrile (PAN, molecular weight is 10 4 ) was dissolved in 20g of N,N-dimethylformamide (DMF). After complete dissolution, 5mL was placed in a syringe, electrospun at a voltage of 28kv, and the spun fiber membrane was removed after 5h.

[0059] (2) Weigh 0.3g two-dimensional titanium carbide powder (Ti 3 C 2 ) into 30mL of deionized water, ultrasonically dissolved to uniformly obtain a titanium carbide dispersion, then add 0.075g of cobalt chloride to dissolve, and at room temperature, immerse the spinning fiber membrane described in step (1) in the solution for 3 hours under an argon atmosphere Take out and dry to obtain impregnated membrane;

[0060] (3) Under the protection of argon, place the impregnated film of step (2) in a high-temperature furnace, place 0.225g of sulfur powder upstream, the ...

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Abstract

The invention discloses a composite nanocatalyst of MXene and transition metal sulfide based on a fiber skeleton and a preparation method thereof, belonging to the field of nanomaterials and catalysis. The method includes: treating the fiber, metal salt, and transition metal carbide MXene prepared by electrospinning with a low-temperature low-oxygen impregnation method, and then freeze-drying to obtain the MXene of the fiber skeleton, and then calcining at a high temperature under a protective atmosphere to obtain a structure and composition. Controlled nanostructured supported catalysts for electrolysis of water. The present invention uses fibers as the MXene skeleton to overcome the shortcoming that the layered structure of transition metal carbides is easy to stack, so that MXene has a larger effective load specific surface area, improves the bonding between the substrate and the load compound, and makes the catalyst show more excellent effects and stability, while the preparation process is simple, efficient, and environmentally friendly, and has broad application prospects in the industrialization of hydrogen energy.

Description

technical field [0001] The invention belongs to the field of nanomaterials, energy and catalysis, and in particular relates to a composite nanocatalyst of MXene and transition metal sulfide based on a fiber skeleton and a preparation method thereof. Background technique [0002] Fossil fuels, including coal, oil, and natural gas, are non-renewable resources. Based on the current consumption rate, they will eventually be exhausted in the future. At the same time, the extensive use of fossil fuels has also brought irreversible harm to the earth's environment. Dust particles, waste water, noise, harmful gases such as sulfur oxides and nitrogen oxides, and a large amount of carbon dioxide emissions have caused global warming and serious air quality. Serious environmental problems such as environmental degradation have attracted widespread attention from the society. Hydrogen energy is considered to be the most promising clean energy in the 21st century due to its advantages suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/091C25B11/056C25B11/054
CPCC25B1/04Y02E60/36
Inventor 贾志欣马淑菲赵祺杜明亮贾德民
Owner SOUTH CHINA UNIV OF TECH
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