Graphene-based aerogels are extremely lightweight 3D scaffold materials that can be lighter than air. They are quite elastic and can easily retain their original form after some compression. In addition, the low density of graphene-based aerogels makes them promising absorbents. Due to these fascinating properties, graphene-based aerogels have attracted increasing interest in academia and industry currently. Alfa Chemistry is an expert in the aerogel field and we provide customers with graphene aerogels, as well as B-doped, N-doped, P-doped, S-doped, CNT-doped, magnetic, ultralight and highly elastic 3D graphene aerogels. In addition, you can also customize the product according to your actual needs for product performance and applications. Do you want to know more about our products? Please click on the link above.
Preparation
The main routes for graphene-based aerogel preparation are namely, hydrothermal reduction, chemical reduction, template-directed reduction, and cross-linking[1].
Hydrothermal reduction: In this method, conditions of high temperature and high pressure are needed, and the starting solutions are firmly sealed. In this way, the gelation rate is controlled and gel integrality is kept.
Chemical reduction: This method uses mild reducing agents like hydrazine, vitamin C, and sodium ascorbate to restore the sp2 network, rather than thermal reduction by high temperature in an inert or reducing environment.
Template-directed reduction: This method is a very useful method for obtaining porous graphene-based aerogels because it prevents randomness of synthetic products.
Cross-linking: Generally speaking, cross-linking agents promote the gelation of graphene oxide (GO) sheets by strengthening the bonding force between the sheets. Common cross-linking agents include compounds that contain hydroxyl, oxygen, or nitrogen.
Applications
Graphene-based aerogels can be produced by different methods and that lead to materials with enhanced properties such as high conductivity, high mechanical strength, thermal stability, and high adsorption capacity for dyes, oils, organic solvents, inorganic ions, etc. Therefore, graphene-based aerogels can be used in energy storage such as supercapacitors, high quality electrodes, and environmental remediation such as air purification and water treatment.
Why Choose Us?
Alfa Chemistry is proud to offer a variety of high quality graphene-based aerogels to our customers. In addition, you can also customize the product according to your actual needs for product performance and applications. Just call us if you need help, and we will deliver the product on time and under budget.
Reference
- Gorgolis, G.; Galiotis, C. Graphene aerogels: a review. 2D Material. 2017, 4: 32001.
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