Fig. 6: MNG membrane for binary dye mixture separation under dead-end filtration. | Nature Communications

Fig. 6: MNG membrane for binary dye mixture separation under dead-end filtration.

From: Microwave-assisted design of nanoporous graphene membrane for ultrafast and switchable organic solvent nanofiltration

Fig. 6

The test was conducted at 3 bar and dilution was conducted with 100 mL of IPA. The total concentration was 1000 ppm in IPA and the weight ratio of the dyes was 1:1. a Schematic illustration of binary dye mixture separation. The colored square and circle are dye molecules. b Photographs of feed, re-dispersed retentate, and permeate solutions after each filtration cycle. c UV–Visible absorbance spectra of AR, MO, and their mixture solutions in IPA. d, e UV–Visible absorbance spectra of re-dispersed retentate and permeate solutions after each filtration cycle. f, g Purity and concentration of AR and MO in the re-dispersed retentate and permeate solutions after each filtration cycle.

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