Controlled degrees of oxidation of nanoporous graphene filters for water purification using an aqueous arc discharge

The aqueous arc discharge process was developed to produce a controlled number of graphene layers and degree of oxidation-including functional groups as well as pore formation by simply adjusting the arc discharge power. Interestingly, the resulting graphene sheets showed enhanced water filtration performance in terms of a decrease in the ion diffusion and adsorption of organic dyes.156