Nanoporous metal-polymer composite membranes for organics separations and catalysis

Michael J. Detisch; Thomas John Balk; Mariah Bezold; Dibakar Bhattacharyya

doi:10.1557/jmr.2020.176

Nanoporous metal-polymer composite membranes for organics separations and catalysis

Michael J. Detisch, Thomas John Balk, Mariah Bezold, Dibakar Bhattacharyya

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Metallic thin-film composite membranes are produced by sputtering metal films onto commercial polymer membranes. The separations capability of the membrane substrate is enhanced with the addition of a 10 nm Ta film. The addition of a tantalum layer decreases the molecular weight cutoff of the membrane from 70 kDa dextran (19 nm) to below 5 kDa (6 nm). Water flux drops from 168 LMH/bar (LMH: liters/meters2/hour) (polymer support) to 8.8 LMH/bar (Ta composite). A nanoporous layer is also added to the surface through Mg/Pd film deposition and dealloying. The resulting nanoporous Pd is a promising catalyst with a ligament size of 4.1 ± 0.9 nm. The composite membrane's ability to treat water contaminated with chlorinated organic compounds (COCs) is determined. When pressurized with hydrogen gas, the nanoporous Pd composite removes over 70% of PCB-1, a model COC, with one pass. These nanostructured films can be incorporated onto membrane supports enabling diverse reactions and separations.

Original language	English
Pages (from-to)	2629-2642
Number of pages	14
Journal	Journal of Materials Research
Volume	35
Issue number	19
DOIs	https://doi.org/10.1557/jmr.2020.176
State	Published - Oct 14 2020

Bibliographical note

Funding Information:
This research was supported by NSF KY EPSCoR grant (Grant 1355438) and NIH-NIEHS-SRC (Award No. P42ES007380). The authors thank Nicolas J. Briot at the UK Electron Microscopy Center, as well as John May and Megan Combs at the UK Environmental Training and Research Lab for help with FIB/SEM and GC/MS work, respectively. The authors also thank Solecta Inc., Oceanside, CA, for providing a flat sheet membrane for testing.

Funding Information:
This research was supported by NSF KY EPSCoR grant (Grant 1355438) and NIH-NIEHS-SRC (Award No. P42ES007380). The authors thank Nicolas J. Briot at the UK Electron Microscopy Center, as well as John May and Megan Combs at the UK Environmental Training and Research Lab for help with FIB/SEM and GC/MS work, respectively. The authors also thank Solecta Inc., Oceanside, CA, for providing a flat sheet membrane for testing.

Publisher Copyright:
Copyright © 2020 Materials Research Society.

Keywords

catalytic
membrane
nanostructure

ASJC Scopus subject areas

Materials Science (all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1557/jmr.2020.176

Cite this

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title = "Nanoporous metal-polymer composite membranes for organics separations and catalysis",

abstract = "Metallic thin-film composite membranes are produced by sputtering metal films onto commercial polymer membranes. The separations capability of the membrane substrate is enhanced with the addition of a 10 nm Ta film. The addition of a tantalum layer decreases the molecular weight cutoff of the membrane from 70 kDa dextran (19 nm) to below 5 kDa (6 nm). Water flux drops from 168 LMH/bar (LMH: liters/meters2/hour) (polymer support) to 8.8 LMH/bar (Ta composite). A nanoporous layer is also added to the surface through Mg/Pd film deposition and dealloying. The resulting nanoporous Pd is a promising catalyst with a ligament size of 4.1 ± 0.9 nm. The composite membrane's ability to treat water contaminated with chlorinated organic compounds (COCs) is determined. When pressurized with hydrogen gas, the nanoporous Pd composite removes over 70% of PCB-1, a model COC, with one pass. These nanostructured films can be incorporated onto membrane supports enabling diverse reactions and separations.",

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note = "Funding Information: This research was supported by NSF KY EPSCoR grant (Grant 1355438) and NIH-NIEHS-SRC (Award No. P42ES007380). The authors thank Nicolas J. Briot at the UK Electron Microscopy Center, as well as John May and Megan Combs at the UK Environmental Training and Research Lab for help with FIB/SEM and GC/MS work, respectively. The authors also thank Solecta Inc., Oceanside, CA, for providing a flat sheet membrane for testing. Funding Information: This research was supported by NSF KY EPSCoR grant (Grant 1355438) and NIH-NIEHS-SRC (Award No. P42ES007380). The authors thank Nicolas J. Briot at the UK Electron Microscopy Center, as well as John May and Megan Combs at the UK Environmental Training and Research Lab for help with FIB/SEM and GC/MS work, respectively. The authors also thank Solecta Inc., Oceanside, CA, for providing a flat sheet membrane for testing. Publisher Copyright: Copyright {\textcopyright} 2020 Materials Research Society.",

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N2 - Metallic thin-film composite membranes are produced by sputtering metal films onto commercial polymer membranes. The separations capability of the membrane substrate is enhanced with the addition of a 10 nm Ta film. The addition of a tantalum layer decreases the molecular weight cutoff of the membrane from 70 kDa dextran (19 nm) to below 5 kDa (6 nm). Water flux drops from 168 LMH/bar (LMH: liters/meters2/hour) (polymer support) to 8.8 LMH/bar (Ta composite). A nanoporous layer is also added to the surface through Mg/Pd film deposition and dealloying. The resulting nanoporous Pd is a promising catalyst with a ligament size of 4.1 ± 0.9 nm. The composite membrane's ability to treat water contaminated with chlorinated organic compounds (COCs) is determined. When pressurized with hydrogen gas, the nanoporous Pd composite removes over 70% of PCB-1, a model COC, with one pass. These nanostructured films can be incorporated onto membrane supports enabling diverse reactions and separations.

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Nanoporous metal-polymer composite membranes for organics separations and catalysis

Abstract

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Keywords

ASJC Scopus subject areas

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