Multifunctional self-cleaning Zr-Porphyrin@PG membrane for wastewater treatment

Wenju Liu, Yafang Hou, Peixia Zhao, Yanmin Shen, Yatao Zhang, Carmine D'Agostino

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Abstract

Incorporation of three-dimensional (3D) nanoparticles into two-dimensional (2D) nanosheets can increase the number of nanofluidic channels, thereby significantly improving membrane permeability. In this study, Zr-porphyrin metal-organic frameworks (MOFs) nanoparticles were grown in-situ on a porous graphene oxide sheet structure to fabricate a multifunctional composite nanofiltration membrane. The results demonstrated that the growth of Zr-porphyrin on the porous graphene was limited, resulting in a more uniform distribution of smaller particles, and a larger specific surface area. The water permeability of the membrane was 29.2 LMH bar−1, which was significantly higher than that of the thin-film composite (TFC) membrane (8.9 LMH bar−1). Furthermore, the selectivity of the membrane was maintained, with a rejection rate exceeding 99.9 % for four dyes, Na2SO4 rejection rate of 97 %, and NaCl rejection rate of 18 %. This membrane also demonstrated a good stability in continuous operation for 72 h. In addition, the membrane displayed excellent photocatalytic and antibacterial activities. This work presents a versatile strategy for developing multifunctional composite nanofiltration membranes with high permeability, superior decolorization ability, outstanding divalent salt removal, excellent photocatalytic activity, and antibacterial properties.
Original languageEnglish
Article number162290
JournalApplied Surface Science
Volume687
Early online date3 Jan 2025
DOIs
Publication statusE-pub ahead of print - 3 Jan 2025

Keywords

  • Zr-porphyrin MOFs
  • Porous graphene oxide
  • Nanofiltration membrane
  • Self-cleaning
  • Wastewater treatment

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