Selective Molecular Separation on Ti 3 C 2 T x –Graphene Oxide Membranes during Pressure-Driven Filtration: Comparison with Graphene Oxide and MXenes

作者：Kyoung Min Kang, Dae Woo Kim, Chang E. Ren, Kyeong Min Cho, Seon Joon Kim, Jung Hoon Choi, Yoon Tae Nam, Yury G. Gogotsi, Hee‐Tae Jung · 发表于：ACS Applied Materials & Interfaces · 年份：2017 · DOI：10.1021/acsami.7b10932 · 被引用次数：265 · 研究领域：MXene and MAX Phase Materials、Graphene and Nanomaterials Applications、Graphene research and applications

In this work, we prepared 90 nm thick Ti 3 C 2 T x –graphene oxide (GO) membranes laminated on a porous support by mixing GO with Ti 3 C 2 T x . 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 Ti 3 C 2 T x membrane.