Surface modification of TFC-PA membrane using α-MnO2/UiO-66-NO2 for enhancing filtration performance

Tân Nguyễn Xuân; Thanh Sơn Lê; Dai Trinh Xuan

doi:10.62239/jca.2025.066

Authors

Nguyen Xuan Tan Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi
Le Thanh Son Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi
Trinh Xuan Dai Faculty of Chemistry, VNU University of Science, Vietnam National University, Hanoi

DOI:

https://doi.org/10.62239/jca.2025.066

Keywords:

Membrane modification, MOF, filtration

Abstract

In this study, α-MnO₂/UiO-66-NO₂/TFC-PA composite membranes were successfully synthesized by immobilizing α-MnO₂/UiO-66-NO₂ onto the outermost surface of polyamide selective layer of TFC-PA membrane during the interfacial polymerization process. The membranes were characterized using techniques such as XRD, ATR-IR, EDX, SEM and contact angle measurements. The filtration performance was evaluated using a 1000 ppm NaCl solution. Various factors affecting separation efficiency were also investigated, including polymerization time, temperature, oxide loading, and composite material content. The experimental results exhibited the successful synthesis of both α-MnO₂/UiO-66-NO₂ and the α-MnO₂/UiO-66-NO₂/PA membrane. The modified membrane possessed a water flux three times higher than the pristine membrane and over 8% increase in salt rejection. In addition, the modified membrane maintained a high selectivity after long time of filtration.

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