Three-dimensional network graphene airgel, its preparation method and application
A graphene airgel and three-dimensional network technology, applied in the direction of airgel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problem of less attention to solid-phase carbon sources, achieve excellent adsorption and catalytic performance, Enrich the pore structure and specific surface area, the effect of controllable shape
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0018] Specifically, the invention discloses a preparation method of a three-dimensional network graphene airgel, comprising the following steps:
[0019] (1) dissolving the polymer and the transition metal salt in water to obtain a mixed solution;
[0020] (2) Sealing and heating the solution obtained in step (1);
[0021] (3) The product obtained in step (2) is first mixed with the polysaccharide solution, then repeatedly thawed, and then mixed with the transition metal salt solution to form a gel;
[0022] (4) Calcining the gel product obtained in step (3) at a high temperature under a protective atmosphere and metal substrate catalysis, to obtain the three-dimensional network graphene airgel.
[0023] Wherein, the polymer in step (1) can be all aliphatic alcohols such as polyvinyl alcohol and polyethylene glycol, proteins such as gelatin and silk fibroin, and sugars such as agar.
[0024] Wherein, the transition metal salt in step (1) is, for example, salts of all transi...
Embodiment 1
[0038] In this embodiment, the three-dimensional network graphene airgel is prepared by the following specific steps:
[0039] Prepare a mixed solution of polyvinyl alcohol and ferric sulfite, wherein the concentration of polyvinyl alcohol in the final solution is 10 mg / mL, and the concentration of ferric sulfite in the final solution is 0.1 mol / L, and stir to form a uniform solution. Put the mixed solution into a polytetrafluoroethylene-lined stainless steel reaction kettle and heat it at 120°C for 12 hours. After the reaction, dissolve sodium alginate into the product solution. The concentration of sodium alginate is 40 mg / mL, and stir to form a uniform solution. Add the solution dropwise into 100mL 30mg / mL ferric sulfite solution to cross-link sodium alginate and iron ions to form gel balls, freeze the gel balls at -40°C for 12h, then thaw at room temperature for 12h, repeat Cold thaw 3 times to allow polyvinyl alcohol to form a gel. The double network gel was freeze-dried...
Embodiment 2
[0041] Prepare a mixed solution of polyvinyl alcohol and copper nitrate, wherein the concentration of polyvinyl alcohol in the final solution is 10mg / mL, and the concentration of copper nitrate in the final solution is 0.1mol / L, and stir to form a uniform solution. Put the mixed solution into a polytetrafluoroethylene-lined stainless steel reaction kettle and heat it at 200°C for 24 hours. After the reaction, dissolve sodium carboxymethylcellulose in the product solution. The concentration of sodium carboxymethylcellulose is 80 mg / mL. Stir to form a homogeneous solution, drop this solution into 100mL 30mg / mL copper nitrate solution drop by drop, make sodium carboxymethylcellulose cross-link with copper ions to form gel balls, freeze the gel balls at -40°C for 12h , then thawed at room temperature for 12 hours, and repeated freezing and thawing three times to make the polyvinyl alcohol form a gel. The double network gel was freeze-dried to form an aerogel, and the aerogel was ...
PUM
Property | Measurement | Unit |
---|---|---|
specific surface area | aaaaa | aaaaa |
specific surface area | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com