Details

Autor(en) / Beteiligte

• Wang, Ao
• Xu, Hang
• Fu, Jiawei
• Lin, Tao
• Ma, Jun
• Ding, Mingmei
• Gao, Li

Titel

Enhanced high-salinity brines treatment using polyamide nanofiltration membrane with tunable interlayered MXene channel

Ist Teil von

• The Science of the total environment, 2023-01, Vol.856, p.158434-158434, Article 158434

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• The introduce of a nanomaterial interlayer between the substrate and polyamide is identified as a promising strategy to construct highly performed membranes. Two-dimensional (2D) materials are potential candidates as interlayer for advanced thin-film nanocomposite interlayer (TFNi) membranes. Nevertheless, low permeability, selectivity and long-term stability are still critical issues in TFNi membrane manufacture. Herein, a scalable approach for constructing TFNi membranes was implemented using stacked MXene nanosheets as interlayer, wherein the Fe3O4 nanoparticles worked as the sacrificial template to regulate the interlayer spacing of the 2D channels. SEM, XPS, water contact angle, and zeta potential were used to characterize the physical and chemical properties of prepared TFNi membranes, and the results shows that the presence of MXene interlayer increased the hydrophilicity, thinness and roughness of polyamide layer compared to that of pure TFC membranes. Besides, the enlarged interlayer channel after the sacrifice of the Fe3O4 nanoparticles greatly boosted the transport of the water molecules. The resultant membranes exhibited nearly double fold of water flux (66.4 ± 3.45 L·m−2·h−1) and higher selective separation factor (48.4) compared with those prepared without interlayer, while the outstanding salt rejection (>97 %) was maintained. This work achieves an innovative strategy for multifunctional polyamide nanofiltration membrane construction. [Display omitted] •Novel TFNi-MEF membrane was prepared by introducing MXene as interlayer.•Fe3O4 nanoparticles were embedded and etched to construct fast water channels.•The membranes synchronously improved water flux and salt rejection.•The mechanism for combination of 2D and 1D materials as interlayer was analyzed.