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Due to the discovery of graphene, researchers were awarded the Nobel Prize in Physics in 2010. When can we see products produced by the world's most innovative materials? This article may help to dispel the fog for everyone.
1. Salt can be separated from seawater using graphene membranes
The surface of the Earth is mostly covered by water, but due to the presence of a large amount of salt, it is difficult for us to use it as a source of drinking water. To solve this problem, researchers at the University of Manchester have developed an expandable graphene oxide film with uniform pore size, which can filter out extremely small salt particles without affecting the flow of water.
Due to the fact that graphene membranes become swollen when submerged in water, they cannot filter out extremely small ordinary salt ions. To this end, they found a method to control the degree of expansion of thin films in water through physical means. This method makes their pore size smaller than ordinary salt ions, thereby filtering out unwanted salts, particles, and molecules. At the same time, this thin film still allows water flow to pass through very smoothly.
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