▎ 摘　　要

NOVELTY - The membrane has a nano-defective graphene film that has an ID /IG ratio of about 0.6 or higher. The nano-defective graphene has an ID /IG ratio of about 1.2 or higher. The nano-defective graphene is selected from the group consisting of flakes, films, sheets, plates, and discs. The nano-defective graphene is a monolayer or a few layer. The nano-defective graphene is synthesized by reacting an oxidizer and a fuel in a modified multiple, inverse-diffusion flame burner. The modified multiple, inverse-diffusion flame burner comprises delivery tubes for the fuel extending beyond a main burner surface. USE - Ultrafiltration membrane for synthesizing carbon-based nanostructures and articles derived from the nanostructure, where the graphene structure is monolayer graphene or nano-defective graphene. ADVANTAGE - The method is capable of synthesizing carbon-based graphene with high yield and purity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a method of synthesizing the ultrafiltration membrane; and a method of ultrafiltration. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the rasterizing 3-burner assembly across a surface to coat/grow graphene.