New Monash University research published this week in the Royal Society of Chemistry journalNanoscale has found a simple and effective way of capturing #graphene s and the toxins and contaminants they attract from water by using light. The findings could have significant implications for large-scale water purification.
A small amount of a special light-sensitive soap was added to the water containing the graphenes and contaminants. The soap changes its molecular structure when light of a particular color is shone onto it. This changes the way it interacts with carbon materials in the graphene and causes them to separate out (along with contaminants stuck to them), enabling easier extraction of the graphenes and contaminants. Shining a different colored light re-disperses the graphenes for re-use.
Monash researcher Dr. Rico Tabor explains the diverse technological opportunities offered by graphene owing to its unique structure and properties.
“Among its many potential uses, the prospect of using graphenes for the purpose of water purification is extremely promising. Because the structure is essentially two-dimensional and only an atom thick, graphene `sheets' have the highest surface area possible, meaning their capacity to mop up contaminants in water surpass that of any currently used materials or membranes,” Tabor says.
http://app.cemag.us/news/2016/03/capturing-graphene-light-could-help-purify-water
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