Iron-functionalized membranes for nanoparticle synthesis and reactions

Scott Lewis, Vasile Smuleac, Alex Montague, Leonidas Bachas, Dibakar Bhattacharyya

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Membrane-based separation processes have been used extensively for drinking water purification, wastewater treatment, and numerous other applications. More recent developments in membrane functionalization have made the use of membrane science important in diverse fields, from tunable separations to catalysis. The focus of this work is to create a common membrane platform for the incorporation of technologies capable of degrading target pollutants. Functionalized membranes capable of metal capture were created using water-based and solvent-based acrylic acid polymerization to synthesize poly(acrylic acid) (PAA) within poly(vinylidene fluoride) (PVDF) membrane pores. The COO groups of PAA were used to capture Fe(II), which was then either reduced and doped with Pd to form Fe/Pd nanoparticles or used as-is for free radical generation with hydrogen peroxide. Fe/Pd nanoparticles were synthesized within the pores of a PAA/PVDF membrane functionalized via aqueous (green) chemistry and used to dechlorinate trichloroethylene (TCE) and 2,2′-dichlorobiphenyl (DiCB). A PAA/PVDF membrane containing immobilized Fe(III) was used to obtain controlled free radical generation and target organic (pentachlorophenol) degradation within the membrane pore under convective flow conditions.

Original languageEnglish (US)
Pages (from-to)3289-3311
Number of pages23
JournalSeparation Science and Technology (Philadelphia)
Volume44
Issue number14
DOIs
StatePublished - 2014

Keywords

  • Dechlorination
  • Fe/Pd nanoparticles
  • Free radical
  • PCB
  • TCE

ASJC Scopus subject areas

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

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