Selective Molecular Separation on Ti3C2Tx-Graphene Oxide Membranes during Pressure-Driven Filtration: Comparison with Graphene Oxide and MXenes

Kyoung Min Kang, Dae Woo Kim, Chang E. Ren, Kyeong Min Cho, Seon Joon Kim, Jung Hoon Choi, Yoon Tae Nam, Yury Gogotsi, Hee Tae Jung

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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.

Original languageEnglish
Pages (from-to)44687-44694
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number51
Publication statusPublished - 2017 Dec 27


All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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