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Carbon-doped metal oxide interfacial nanofilms for ultrafast and precise separation of molecules

Journal Article · · Science
 [1];  [2];  [3];  [2];  [4];  [4];  [5];  [3];  [5];  [2]
  1. Department of Chemical and Biological Engineering and RENEW Institute, University at Buffalo, Buffalo, NY 14260, USA.; OSTI
  2. Department of Chemical and Biological Engineering and RENEW Institute, University at Buffalo, Buffalo, NY 14260, USA.
  3. Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.
  4. Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY 14260, USA.
  5. Howard P. Isermann Department of Chemical and Biological Engineering and the Center of Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.

Membranes with molecular-sized, high-density nanopores, which are stable under industrially relevant conditions, are needed to decrease energy consumption for separations. Interfacial polymerization has demonstrated its potential for large-scale production of organic membranes, such as polyamide desalination membranes. We report an analogous ultrafast interfacial process to generate inorganic, nanoporous carbon-doped metal oxide (CDTO) nanofilms for precise molecular separation. For a given pore size, these nanofilms have 2 to 10 times higher pore density (assuming the same tortuosity) than reported and commercial organic solvent nanofiltration membranes, yielding ultra-high solvent permeance, even if they are thicker. Owing to exceptional mechanical, chemical, and thermal stabilities, CDTO nanofilms with designable, rigid nanopores exhibited long-term stable and efficient organic separation under harsh conditions.

Research Organization:
Rensselaer Polytechnic Inst., Troy, NY (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
DOE Contract Number:
FE0031730; FG02-09ER16005
OSTI ID:
2418180
Journal Information:
Science, Journal Name: Science Journal Issue: 6662 Vol. 381; ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English

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