Graphene-supported layered MoS2 (molybdenum disulfide) nanocomposite and preparation method thereof

A nanocomposite, molybdenum disulfide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of poor photocatalytic performance and small composite area, and achieve improved catalytic performance, High catalytic performance and uniform distribution effect

Inactive Publication Date: 2014-12-24
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of graphene-loaded MoS prepared by prior art 2 Due to the problem that the photocatalytic performance of nanoparticles is poor due to the small composite area with graphene, the inv...

Method used

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  • Graphene-supported layered MoS2 (molybdenum disulfide) nanocomposite and preparation method thereof
  • Graphene-supported layered MoS2 (molybdenum disulfide) nanocomposite and preparation method thereof
  • Graphene-supported layered MoS2 (molybdenum disulfide) nanocomposite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048]Disperse 10 mg of graphene oxide in 10 mL of dimethylformamide (DMF), place in a beaker and vibrate ultrasonically for 4 hours to obtain a stable and uniform suspension. Then 11.02 mg of ammonium molybdate and 9.51 mg of thiourea (the molar ratio of molybdenum to sulfur is equal to 1:2) were added into 20 mL of deionized water, and stirred thoroughly to obtain a clear solution. Mix the suspension of graphene oxide and DMF with the solution of ammonium molybdate and thiourea evenly, and add it into a polytetrafluoroethylene-lined hydrothermal reactor (volume 50mL), and the filling degree of the reactor is 50% to 60%. , the reaction kettle was placed in a constant temperature box, and the temperature was maintained at 220° C. for hydrothermal reaction for 18 hours. The black product obtained by the hydrothermal reaction was removed from the mixed solution of deionized water and ethanol (volume ratio 1:1) to wash away DMF and reaction residues, and then the obtained product...

Embodiment 2

[0052] Disperse 10 mg of graphene oxide in 12 mL of DMF, place in a beaker and vibrate ultrasonically for 4 h to obtain a stable and uniform suspension. Then add 15.25 mg of ammonium molybdate and 11.06 mg of thiourea (the molar ratio of molybdenum to sulfur is greater than 1:2) into 13 mL of deionized water, and stir thoroughly to obtain a clear solution. The suspension of graphene oxide and DMF and the solution of ammonium molybdate thiourea are mixed uniformly, and added to a hydrothermal reaction kettle (volume 50mL) of a polytetrafluoroethylene liner, and the filling degree of the reaction kettle is 50% to 60%. The reaction kettle was placed in a constant temperature box, and the temperature was maintained at 200° C. for hydrothermal reaction for 18 hours. The black product obtained by the hydrothermal reaction was removed from the mixed solution of deionized water and ethanol (volume ratio 1:1) to wash away DMF and reaction residues, and then the obtained product was dri...

Embodiment 3

[0056] Disperse 10 mg of graphene oxide in 10 mL of DMF, place in a beaker and vibrate ultrasonically for 4 h to obtain a stable and uniform suspension. Then add 12.25 mg of ammonium molybdate and 14.25 mg of thiourea (the molar ratio of molybdenum to sulfur is less than 1:2) into 20 mL of deionized water, and stir thoroughly to obtain a clear solution. The suspension of graphene oxide and DMF and the solution of ammonium molybdate thiourea are mixed uniformly, and added to a hydrothermal reaction kettle (volume 50mL) of a polytetrafluoroethylene liner, and the filling degree of the reaction kettle is 50% to 60%. The reaction kettle was placed in a constant temperature box, and the temperature was maintained at 200° C. for hydrothermal reaction for 20 h. The black product obtained by the hydrothermal reaction was removed from the mixed solution of deionized water and ethanol (volume ratio 1:1) to wash away DMF and reaction residues, and then the obtained product was dried at 8...

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Abstract

The invention relates to a graphene-supported layered MoS2 (molybdenum disulfide) nanocomposite and a preparation method thereof, belongs to the technical field of preparation of nano materials, and is used for solving the problem that graphene-supported MoS2 nanoparticles prepared in the prior art are poorer in catalytic performance due to small composite areas between the nanoparticles and graphene. Ammonium molybdate and thiourea are taken as initiators, and layered nano MoS2 can be supported on the surface of graphene oxide under the hydrothermal condition; after roasting treatment, the graphene-supported layered MoS2 has the higher crystallinity, and the photocatalytic efficiency is more than 1.7 times that of commercial nano titanium oxide. The method is simple and easy to operate; MoS2 nanosheets are uniformly distributed on the surface of the graphene and have larger contact areas with the graphene, so that the nanocomposite has the high catalytic performance and is widely applied to fields of electro-catalysis, photo-catalysis, hydrogen evolution catalysis and the like.

Description

technical field [0001] The invention relates to the technical field of nanometer material preparation. It specifically relates to the preparation of graphene-supported molybdenum disulfide multilayer composite nanosheets with a new structure and a new method by a hydrothermal method. Background technique [0002] Molybdenum disulfide (MoS 2 ) is an important natural mineral with good thermal and chemical stability. Because of its unique two-dimensional structure, it was widely used as a solid lubricant as early as the 17th century. In recent years, with the rapid development of nanotechnology, nano-phase molybdenum disulfide has shown many excellent properties in the fields of electrocatalysis, photocatalysis, hydrogen evolution catalysis, etc., making MoS 2 Nanomaterials have broad application prospects in new functional materials and nanodevices. Therefore, the nanophase MoS 2 become the focus of people's research. [0003] In the early days, people for MoS 2 Resear...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/02
Inventor 李全军袁野宫晨张华芳蓝雷雷刘冰冰
Owner JILIN UNIV
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