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

• 成果类型: Article
• 署名作者: Sengupta, Bratin; Dong, Qiaobei; Khadka, Rajan; Behera, Dinesh Kumar; Yang, Ruizhe; Liu, Jun; Jiang, Ji; Keblinski, Pawel; Belfort, Georges; Yu, Miao
• 署名单位: State University of New York (SUNY) System; University at Buffalo, SUNY; State University of New York (SUNY) System; University at Buffalo, SUNY; Rensselaer Polytechnic Institute; State University of New York (SUNY) System; University at Buffalo, SUNY; Rensselaer Polytechnic Institute; Rensselaer Polytechnic Institute
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10453
• DOI: 10.1126/science.adh2404
• 发表日期: 2023-09-08
• 页码: 1098-1104
• 关键词: organic-solvent nanofiltration; film nanocomposite membranes; polyamide nanofilms; layer deposition; transport; polymers; DYNAMICS; nanoparticles; microporosity; nanochannels

摘要

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.