Preparation method and application of three-dimensional graphene aerogel load molybdenum disulfide nano-sheet hybridization material

A technology of graphene airgel and molybdenum disulfide, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of surface inert agglomeration, and the excellent performance of materials cannot be effectively brought into play. Potential discounts, etc.

Inactive Publication Date: 2016-10-26
TONGJI UNIV
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  • Abstract
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Problems solved by technology

However, the π-π interaction and van der Waals force between graphene sheets are relatively large, resulting in serious nano-agglomeration and sheet stacking between layers, which greatly reduces the effective area of ​​graphene, making it Application Potential is greatly reduced
At present, the graphene prepared by conventional methods is in the form of ultra-fine powder. During use, there will be problems such as agglomeration and uneven distribution due to size effects, surface inertia, etc., which will lead to the ineffective performance of the excellent performance of the material itself.

Method used

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  • Preparation method and application of three-dimensional graphene aerogel load molybdenum disulfide nano-sheet hybridization material

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Experimental program
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Embodiment 1

[0034] This embodiment includes the following steps:

[0035] (1) Weigh 100mg of graphene oxide (Go) and dissolve it in 100ml of deionized water, sonicate it for 5-6h to make it evenly dispersed to obtain a 1mg / ml graphene oxide solution;

[0036] (2) Add 200 mg of reduced glutathione to the above solution, then ultrasonicate for 1 hour, and continuously stir to obtain a uniform dispersion solution;

[0037] (3) Place the solution obtained in step (2) in a constant temperature water bath at 85°C for 12 hours to obtain a cylindrical reduced graphene oxide hydrogel ( figure 1 )

[0038] (4) The reduced graphene oxide hydrogel obtained in step (3) was soaked in tert-butanol for 48 hours, the tert-butanol was replaced twice, and then freeze-dried for 48 hours to prepare graphene aerogel ( figure 2 ),by figure 2 It can be seen that the graphene aerogel maintains the original hydrogel shape well after drying, and then it is annealed under argon and 800℃ for 1h; the morphology of the prepar...

Embodiment 2

[0047] The mass of ammonium tetrathiomolybdate in Example 1 is changed to 10 mg, and the rest are the same as in Example 1. The final hybrid material obtained is labeled MG-1

Embodiment 3

[0049] The mass of ammonium tetrathiomolybdate in Example 1 is changed to 20 mg, and the rest are the same as in Example 1. The final hybrid material obtained is labeled MG-2.

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Abstract

The invention belongs to the technical field of a new energy nano function material, and specifically relates to a preparation method and application of a three-dimensional graphene load molybdenum disulfide nano-sheet hybridization material. A three-dimensional graphene aerogel macroscopic body is prepared through a hydrothermal reduction self-assembly method, and nano-sheet layer crystal-phase molybdenum disulfide grows on a three-dimensional graphene aerogel skeleton through adoption of a H<2> reduction method. According to the three-dimensional graphene load molybdenum disulfide nano-sheet hybridization material prepared in the invention, a large specific surface of three-dimensional graphene provides more active sites for growth of molybdenum disulfide nano sheets, the nano-sheet layer crystal-phase molybdenum disulfide as an active catalyst disperse on a surface of a three-dimensional graphene aerogel, heterojunction structure is formed between the molybdenum disulfide nano sheet and the three-dimensional graphene aerogel through intermolecular forces, and edge activity of the molybdenum disulfide nano sheet is fully exposed. The high catalytic property of molybdenum disulfide is combined with the high specific surface area and excellent eectrical conductivity of the three-dimensional graphene. The hybridization material is applied to fuel cell counter electrode preparation to perform cell assembly so that photoelectric conversion efficiency is improved.

Description

Technical field [0001] The invention belongs to the technical field of new energy nano-functional materials, and specifically relates to a preparation method and application of a three-dimensional graphene loaded molybdenum disulfide nano-sheet hybrid material. Background technique [0002] With the huge consumption of fossil energy by the global social and economic development, energy scarcity and environmental and ecological problems have become obstacles restricting the sustainable development of various countries. Solar energy as a clean energy has attracted extensive attention from scientific researchers from all over the world, and the rapid development of nanotechnology , Has become a powerful driving force for the development of new solar technology. At present, scientists are committed to the research of new solar cell materials and structures. In 1991, Professor Gratzel and his research team from the Lausanne Institute of Technology in Switzerland used nanoporous TiO2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G9/2022Y02E10/542Y02P70/50
Inventor 马杰沈威陈君红
Owner TONGJI UNIV
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