High permeability sub-nanometre sieve composite MoS2 membranes

Bedanga Sapkota, Wentao Liang, Armin VahidMohammadi, Rohit Karnik, Aleksandr Noy, Meni Wanunu

Research output: Contribution to journalArticle

Abstract

Two-dimensional membranes have gained enormous interest due to their potential to deliver precision filtration of species with performance that can challenge current desalination membrane platforms. Molybdenum disulfide (MoS2) laminar membranes have recently demonstrated superior stability in aqueous environment to their extensively-studied analogs graphene-based membranes; however, challenges such as low ion rejection for high salinity water, low water flux, and low stability over time delay their potential adoption as a viable technology. Here, we report composite laminate multilayer MoS2 membranes with stacked heterodimensional one- to two-layer-thick porous nanosheets and nanodisks. These membranes have a multimodal porous network structure with tunable surface charge, pore size, and interlayer spacing. In forward osmosis, our membranes reject more than 99% of salts at high salinities and, in reverse osmosis, small-molecule organic dyes and salts are efficiently filtered. Finally, our membranes stably operate for over a month, implying their potential for use in commercial water purification applications.

Original languageEnglish (US)
Article number2747
JournalNature communications
Volume11
Issue number1
DOIs
StatePublished - Dec 1 2020
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Sapkota, B., Liang, W., VahidMohammadi, A., Karnik, R., Noy, A., & Wanunu, M. (2020). High permeability sub-nanometre sieve composite MoS2 membranes. Nature communications, 11(1), [2747]. https://doi.org/10.1038/s41467-020-16577-y