The truth about graphene – what’s the hold up?
A group of researchers has developed «green» and an efficient method for the synthesis of graphene sheets from eucalyptus bark extract, which can reduce the cost of producing a two-dimensional material by 20 times.
Unique Graphene’s properties, such as high strength, flexibility, small thickness and the ability to conduct heat and electricity 10 times better than copper, make it an ideal material for applications in various fields: from flexible nanoelectronics to innovative fuel cells. The main obstacle to its widespread use remains the cost of manufacture, which now amounts to about $ 100 per 1 gram..
However, researchers from the Royal University of Technology of Melbourne and the Warangal National Institute of Technology have presented a new chemical method for synthesizing graphene without the use of toxic reagents..
To do this, they used a solution of eucalyptus polyphenols obtained from tree bark extract..
Polyphenolic compounds provide the reduction of exfoliated graphene oxide to soluble under reflux in an aqueous medium. Spectroscopy using infrared, X-ray radiation and radiometric studies have confirmed the effective removal of oxygen functional groups and the formation of sheets from 1–4 layers G.
Tests using a supercapacitor have shown that «green» graphene meets the quality and performance characteristics of traditional.
According to scientists, the new method can reduce the cost of producing a two-dimensional material to $ 0.5 per gram, which will make it affordable for most industries and develop a number of new vital technologies..
Scientists have recently used graphene to create foam that even when –269.15 °C remains as elastic as at room temperature.
text: Ilya Bauer, photo: American Chemical Society, cealtech