Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 650, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2022.120394
Keywords
Metal-organic frameworks; Ultrafiltration membrane; Anti-fouling; Self-cleaning; Antibacterial property
Categories
Funding
- Natural Science Foun-dation of China [52070100, 51978341]
- Natural Science Research Project of Universities in Jiangsu Province of China [21KJB610014]
- Natural Science Foundation of Nanjing Normal University [184080H202B317]
Ask authors/readers for more resources
In this study, a quaternary ammonium-functionalized MIL-125 (Me3N+-MIL-125) decorated polyvinylidene fluoride (PVDF) ultrafiltration membrane was fabricated. The membrane showed superior water flux, dye rejection ratio, antibacterial efficiency, and visible-light photocatalytic activity compared to other membranes. It has potential for the remediation of dye-contaminated water.
In this study, quaternary ammonium-functionalized MIL-125 (Me3N+-MIL-125) decorated polyvinylidene fluoride (PVDF) ultrafiltration (UF) membrane was fabricated by a facile two-step assembly method to remove rhodamine B (RhB, a model dye). For comparison purpose, MIL-125 and amino-functionalized MIL-125 (NH2 & nbsp;- MIL-125) based membranes were also prepared. Porous Ti-MOFs layer was firmly anchored on membrane surface by crosslinking reaction between polyethyleneimine and epichlorohydrin, which caused higher hydrophilicity, more positive charge and efficient thermal stability of membrane. Compared to MIL-125 and NH2-MIL-125, Me3N+-MIL-125 endows the membrane with superior water flux (192.7 L m(-2) h(-1), transmembrane pressure = 0.2 MPa), RhB rejection ratio (60.4%) and antibacterial efficiency against E. coli (99.98%) and S. aureus (99.95%). In addition, Me3N+-MIL-125 decorated membrane exhibits excellent visible-light photocatalytic activity. Membrane performance can be fully recovered by visible light irradiation due to the oxidation degradation by reactive oxygen species (ROS, & BULL;OH and O-2(center dot-)) that generated on Me3N+-MIL-125 with the wider visible-light response range and narrower bandgap energy (1.65 eV). This novel multifunctional UF membrane is promising in the application of dye-contaminated water remediation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available