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Hydrogel and aerogel of three-dimensional layered and porous structure metal nanosheet/graphene compound, preparation method and application

A graphene composite and metal nanotechnology, applied in graphene, chemical instruments and methods, nano-carbon, etc.

Pending Publication Date: 2022-04-05
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, the design and preparation of high-end sensing materials such as hydrogels and aerogels composed of three-dimensional graphene and metal nanosheets may provide the possibility to solve the above key problems, but there is no report yet.

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  • Hydrogel and aerogel of three-dimensional layered and porous structure metal nanosheet/graphene compound, preparation method and application
  • Hydrogel and aerogel of three-dimensional layered and porous structure metal nanosheet/graphene compound, preparation method and application
  • Hydrogel and aerogel of three-dimensional layered and porous structure metal nanosheet/graphene compound, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of metal nanosheet / graphene composite hydrogel by solvothermal method

[0037] Add 0.003M palladium acetylacetonate, 0.0025M ruthenium acetylacetonate, and 0.005M tungsten hexacarbonyl to 24mL N,N-dimethylformamide, ultrasonically disperse for 30min, and add 10mL graphene oxide solution into the reaction kettle, and then Add 6mL of acetic acid, stir mechanically for 30min to obtain a homogeneous solution, place it in a temperature of 180°C for 20h, and after natural cooling, a palladium-ruthenium-tungsten alloy nanosheet / reduced graphene composite hydrogel is obtained, and the appearance is similar to that of figure 1 shown.

[0038] (2) Preparation of metal nanosheet / graphene composite airgel by heating and drying

[0039] The metal nanosheet / graphene composite hydrogel was heated and dried at 50°C to obtain a palladium-ruthenium-tungsten alloy nanosheet / reduced graphene composite aerogel, and the obtained appearance was similar to figure 2 As shown,...

Embodiment 2

[0041] (1) Preparation of metal nanosheet / graphene composite hydrogel by solvothermal method

[0042] Add 0.003M palladium acetylacetonate, 0.0025M iron acetylacetonate, and 0.005M tungsten hexacarbonyl to 24mL N,N-dimethylformamide, ultrasonically disperse for 30min, and add 10mL graphene oxide solution into the reaction kettle, and then Add 6mL of acetic acid, stir for 30min with magnetic force to obtain a uniform solution, put it in a temperature of 200°C for 20h, and after natural cooling, a palladium-iron-tungsten alloy nanosheet / reduced graphene composite hydrogel is obtained, and the appearance is similar to that of figure 1 shown.

[0043] (2) Preparation of metal nanosheet / graphene composite airgel by drying under reduced pressure

[0044] The metal nanosheet / graphene composite hydrogel is dried under reduced pressure to obtain a palladium-iron-tungsten alloy nanosheet / reduced graphene composite aerogel, and the obtained appearance is similar to figure 2 As shown, ...

Embodiment 3

[0046] (1) Preparation of metal nanosheet / graphene composite hydrogel by solvothermal method

[0047] Add 0.003M palladium acetylacetonate, 0.0025M platinum acetylacetonate, and 0.005M tungsten hexacarbonyl to 24mL N,N-dimethylformamide, ultrasonically disperse for 30min, and add 10mL graphene oxide solution into the reaction kettle, and then Add 6mL of acetic acid, stir mechanically for 30min to obtain a uniform solution, keep it warm at 150°C for 20h, and after natural cooling, a palladium-platinum-tungsten alloy nanosheet / reduced graphene composite hydrogel is obtained, and the appearance is similar to that of figure 1 shown.

[0048] (2) Preparation of metal nanosheet / graphene composite airgel by vacuum freeze-drying technology

[0049] The metal nanosheet / graphene composite hydrogel was vacuum freeze-dried at -50°C to obtain a palladium-platinum-tungsten alloy nanosheet / reduced graphene composite aerogel, and the obtained appearance was similar to figure 2 As shown, it...

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Abstract

The invention relates to novel metal nanosheet / graphene compound hydrogel and aerogel with a three-dimensional layered and porous structure as well as a preparation method and application of the metal nanosheet / graphene compound hydrogel and aerogel. Hydrogel with a metal nanosheet / graphene composite structure is prepared by adopting an optimized solvothermal technology, and metal nanosheet / graphene composite aerogel with a three-dimensional layered and porous structure is prepared by quick drying. The three-dimensional compound aerogel contains rich defect oxygen and oxygen-containing functional groups, has a porous layered structure, provides a large specific surface area and a large reaction place, can be used in the fields of gas sensing, electrochemical sensing and biosensing, and has potential application value.

Description

technical field [0001] The invention relates to the design and preparation of a novel nanocomposite material with a layered porous structure and its application field, specifically a metal nanosheet / graphene composite hydrogel and aerogel with a three-dimensional layered and porous structure, a preparation method and application. Background technique [0002] Airgel is a colloid with solid characteristics formed by dispersing nanomaterials with a dispersed phase of 1-100 nm in size into a gas dispersion medium. Similarly, a hydrogel is a colloid with solid characteristics composed of nanomaterials with a size of 1-100 nm dispersed in an aqueous medium. Both aerogels and hydrogels have high porosity and high specific surface area, which provide new ideas for the development of high-performance gas-sensing, electrochemical and biological sensing materials and sensing components. Both graphene and graphite oxide are two-dimensional materials, which not only have a large surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C01B32/184G01N27/26G01N27/407
Inventor 杨大驰杜玲玲
Owner NANKAI UNIV
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