While aluminium is a plentiful and cheap metal, gallium is relatively expensive. But what makes gallium the hero in the process is the fact that it remains pure and unchanged after each production of aluminium oxide.
"You just add aluminium to the gallium and out comes aluminium oxide when its surface is exposed to water. You can use gallium again and again. Gallium never participates in the reaction," Professor Kalanter-zadeh said.
Professor Kalantar-zadeh said the manufacture process is so cheap and requiring such low expenditure of energy, these filters could even be made out of a kitchen.
"We are publishing this concept and releasing it to the public domain, so people around the world can use the idea for free and implement it for enhancing the quality of their lives," he said.
