Synthesis of Catalytic Nanoporous Metallic Thin Films on Polymer Membranes

Michael J. Detisch, T. John Balk, Dibakar Bhattacharyya

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

This work deals with the creation of bimetallic thin films on porous polymer membrane surfaces. Metal-polymer composite membranes have been produced through magnetron sputtering. Commercially available membranes with both micrometer and nanometer scale pores were used as supports for deposition. Continuous alloy films of ∼110 nm thickness were deposited to produce the top layer of the composite structure. These films were dealloyed with sulfuric acid creating a nanoporous film structure with a ligament size of 7.7 ± 2.5 nm. The resulting composite membranes were permeable to water at all stages of production, and an polysulfone ultrafiltration membrane with 90 nm of nanoporous Fe/Pd on top showed a flux of 183 L/m2/h (LMH)/bar. The films were evaluated for dechlorination of toxic polychlorinated biphenyls from water. At a loading of 6.6 mg/L Pd attached to 13.2 cm2 support in a 2.5 ppm PCB-1 solution with 1.5 ppm dissolved H2, over 90% of PCB-1 was removed from solution in 30 min, which produced the expected product biphenyl from the dechlorination reaction. The permeation of a 5 ppm PCB-1 solution resulted in a 28% degradation at a single pass through the composite membrane under H2 pressurization at a flux of 75 LMH.

Original languageEnglish
Pages (from-to)4420-4429
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume57
Issue number12
DOIs
StatePublished - Mar 28 2018

Bibliographical note

Publisher Copyright:
© 2018 American Chemical Society.

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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