In this work, we prepared 90 nm thick Ti3C2Tx-graphene oxide (GO) membranes laminated on a porous support by mixing GO with Ti3C2Tx. This process was chosen to prevent the penetration of target molecules through inter-edge defects or voids with poor packing. The lattice period of the prepared membrane was 14.28 Å, as being swelled with water, resulting in an effective interlayer spacing of around 5 Å, which corresponds to two layers of water molecules. The composite membranes effectively rejected dye molecules with hydrated radii above 5 Å, as well as positively charged dye molecules, during pressure-driven filtration at 5 bar. Rejection rates were 68% for methyl red, 99.5% for methylene blue, 93.5% for rose Bengal, and 100% for brilliant blue (hydrated radii of 4.87, 5.04, 5.88, and 7.98 Å, respectively). Additionally, the rejections of composite membrane were compared with GO membrane and Ti3C2Tx membrane.
Bibliographical noteFunding Information:
This research was supported by the Ministry of Science, ICT, and Future Planning (MSIP; 2015R1A2A1A05001844), the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (2015R1A6A3A04057367), the Climate Change Research Hub of KAIST (grant no. N1117056), the Leading Foreign Research Institute Recruitment Program funded by the MSIP (2016K1A4A3945038), and the Korean National Research Foundation via the NNFC-KAIST-Drexel Nano2 Co-op Center (NRF-2015K1A4A3047100).
All Science Journal Classification (ASJC) codes
- Materials Science(all)