ScholarWorks@성균관대학교

초록

"Two-dimensional (2D) nanosheets can be desirable materials to fabricate membranes for ionic and molecular separation such as water purification, seawater desalination, solvent separation, and gas separation. Molybdenum disulfide (MoS2) can be a desirable candidate among the family of 2D nanosheets due to their exceptional physical properties, high stability, and well-defined scalable synthesis methods. In this work, a highly aligned MoS2 layer is fabricated on a centimeter-scale by coating electrochemically exfoliated MoS2 nanosheets via a continuous slot-die coating method. Particular, an additive to stabilize the resulting dispersion of exfoliated MoS2 nanosheets further enlarges the capillary width of the stacked MoS2 nanosheets, which enables the efficient H2 permeation properties as 5.57 × 10−6 mol m−2 s−1 Pa−1 and 13 of H2/CO2 ideal selectivity. Furthermore, this MoS2-based membrane exhibits high thermal stability. While the temperature varies, it shows stable and selective gas permeation properties over 10−6 mol m−2 s−1 Pa−1 H2 permeance, while H2/CO2 ideal selectivity remained at 150 °C for 7 days. © 2024 Elsevier B.V.

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