Thin-film composite forward osmosis membranes functionalized with graphene oxide–silver nanocomposites for biofouling control

Andreia F. Faria, Caihong Liu, Ming Xie, Francois Perreault, Long D. Nghiem, Jun Ma, Menachem Elimelech

Research output: Contribution to journalArticle

93 Scopus citations

Abstract

Innovative approaches to prevent bacterial attachment and biofilm growth on membranes are critically needed to avoid decreasing membrane performance due to biofouling. In this study, we propose the fabrication of anti-biofouling thin-film composite membranes functionalized with graphene oxide–silver nanocomposites. In our membrane modification strategy, carboxyl groups on the graphene oxide–silver nanosheets are covalently bonded to carboxyl groups on the surface of thin-film composite membranes via a crosslinking reaction. Further characterization, such as scanning electron microscopy and Raman spectroscopy, revealed the immobilization of graphene oxide–silver nanocomposites on the membrane surface. Graphene oxide–silver modified membranes exhibited an 80% inactivation rate against attached Pseudomonas aeruginosa cells. In addition to a static antimicrobial assay, our study also provided insights on the anti-biofouling property of forward osmosis membranes during dynamic operation in a cross-flow test cell. Functionalization with graphene oxide–silver nanocomposites resulted in a promising anti-biofouling property without sacrificing the membrane intrinsic transport properties. Our results demonstrated that the use of graphene oxide–silver nanocomposites is a feasible and attractive approach for the development of anti-biofouling thin-film composite membranes.

Original languageEnglish (US)
Pages (from-to)146-156
Number of pages11
JournalJournal of Membrane Science
Volume525
DOIs
StatePublished - 2017

Keywords

  • Antimicrobial activity
  • Biofouling control
  • Forward osmosis
  • Graphene oxide
  • Silver nanoparticles
  • Thin-film composite membranes

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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