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The decision is 25px×50px，only larger than Extra Chew Gum, appearance looks like a piece of black glass, there was coated with a layer of nano-level molybdenum disulfide on the surface of glass. Under the microscope, we can see very small molybdenum disulfide, They are stacked in a block of rectangular glass surface, It looks like a small maze, also like a person's fingerprint. it not only get energy from ultraviolet light, but also can be get energy from visible light in the solar spectrum.
When using, we only need put it into water, then the water is placed in sun.When molybdenum disulfide meets visible light, molybdenum disulfide become a photocatalyst, and then produce hydrogen peroxide (hydrogen peroxide), which kill the vast majority of bacteria. After killed the bacteria, These chemicals are automatically broken down into water and oxygen.
Liu chong, Chief researcher at Stanford university school of materials and energy, explain to energy reporter. In the process of testing, put the glass into 20 milliliter water after 20 minutes. 99.99% bacteria be killed in water.
Compared with traditional water purification method, this is the highest efficiency method and convenient, don’t need to boiling water, it can be save energy.
But its use is limited, it only can be killed escherichia coli and lactobacillus, it doesn’t work to the water of toxic chemical and virus pollution.