Scientists successfully prepared molecular sieve membrane "thinner than cicada wings"
On December 12, a research team led by researcher Yang Weishen and researcher Li Yanshuo of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, successfully prepared a molecular sieve membrane composed of 1 nanometer thick nanosheets for the first time. Its thickness is only 1‰ of the thickness of cicada wings, far "thinner than cicada wings". The thickness of the regular molecular sieve membrane is more than ten times the thickness of the cicada wing. The nanosheets are not only extremely thin, but also have highly regular channels like "mesh", which can accurately screen hydrogen and carbon dioxide molecules with a size difference of only 0.04 nanometers, thus effectively trapping the latter. The permeation flux and separation selectivity of the nanosheet molecular sieve membrane are far away.
2014/12/12
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