| 초록 |
Molecular separation of Ti3C2Tx nano-channels was investigated via pressure driven filtration. Thin Ti3C2Tx films around 90 nm-thick were laminated on the porous support mixed with small amount of graphene oxide to avoid the possible penetration of target molecules through the intra-crystalline defects or poorly packed voids. Prepared films were stacked with interlayer spacing of 14.28 Å at water swelled condition, corresponding to an effective interlayer spacing around 5 Å considering the thickness of OH-terminated Ti3C2TX single sheet to be 9.2 Å. Permeance of liquids was inversely related to the polarity of liquids, showing 25.36 L m-2 h-1 bar-1 for water. The composite membranes were effective to reject dye molecules above hydrated radius of 7 Å and positively charged molecules during pressure driven filtration at 5 bar: 68 % for methyl red (hydrated radius: 4.87 Å), 99.5 % for methylene blue (5.04 Å), 61 % for Rose Bengal (5.88 Å) and 100 % for brilliant blue (7.98 Å). |
