Self-cleaning nanocomposite membranes with phosphorene-based pore fillers for water treatment

Joyner Eke, Katherine Elder, Isabel C. Escobar

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Phosphorene is a two-dimensional material exfoliated from bulk phosphorus and it possesses a band gap. Specifically, relevant to the field of membrane science, the band gap of phosphorene provides it with potential photocatalytic properties, which could be explored in making reactive membranes that can self-clean. The goal of this study was to develop an innovative and robust membrane that is able to control and reverse fouling with minimal changes in membrane performance. To this end, for the first time, membranes have been embedded with phosphorene. Membrane modification was verified by the presence of phosphorus on membranes, along with changes in surface charge, average pore size, and hydrophobicity. After modification, phosphorene-modified membranes were used to filter methylene blue (MB) under intermittent ultraviolet light irradiation. Phosphorene-modified and unmodified membranes displayed similar rejection of MB; however, after reverse-flow filtration was performed to mimic pure water cleaning, the average recovered flux of phosphorene-modified membranes was four times higher than that of unmodified membranes. Furthermore, coverage of MB on phosphorene membranes after reverse-flow filtration was four times lower than that of unmodified membranes, which supports the hypothesis that phosphorene membranes operated under intermittent ultraviolet irradiation can become self-cleaning.

Original languageEnglish
Article number79
JournalMembranes
Volume8
Issue number3
DOIs
StatePublished - Sep 2018

Bibliographical note

Funding Information:
Funding: This research was funded by the National Science Foundation (NSF) under Cooperative Agreement No. 1355438, and by the NSF Kentucky EPSCoR Program.

Funding Information:
This research was funded by the National Science Foundation (NSF) under Cooperative Agreement No. 1355438, and by the NSF Kentucky EPSCoR Program. The authors acknowledge Center of Membrane Sciences, and the facilities, scientific and technical assistance of the Light Microscopy Core, University of Kentucky.

Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • 2D materials
  • Fouling
  • Membranes
  • Nanofiltration
  • Phosphorene

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Filtration and Separation

Fingerprint

Dive into the research topics of 'Self-cleaning nanocomposite membranes with phosphorene-based pore fillers for water treatment'. Together they form a unique fingerprint.

Cite this