▎ 摘　　要

NOVELTY - Method for separating gas phase heavy water involves taking nanoporous graphene and configuring it into an aqueous suspension in container, uniformly dispersing, vacuum filtering on the nanofiltration membrane to form uniform membrane, hanging the prepared membrane in still water vapor containing heavy water, fully absorbing the heavy water in the water vapor using nanoporous graphene on the nanofiltration membrane, soaking the membrane after gas phase adsorption in deionized water at 60 degrees C and leaving still to obtain desorption liquid. USE - Method for separating gas phase heavy water. ADVANTAGE - The method uses steam as the only operating medium, is economical, non-toxic, harmless, energy-saving, and environmentally-friendly, has easy handling of reaction by-products and simple reaction process, does not need for complicated reaction process, advanced reaction vessel and requiring high temperatures.