A filter for water purification that can replace, with a single step, the complex, time-consuming and multi-stage processes currently needed, has been developed by a team from CSIRO Manufacturing (Sydney, Australia; www.csiro.au), led by Dong Han Seo.

The team has demonstrated water desalination via a membrane distillation (MD) process using a graphene membrane, called graphair. Water permeation is enabled by nanochannels of multilayer, mismatched, partially overlapping graphene grains.