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Ion selectivity of graphene nanopores
Open accessAbstract
As population growth continues to outpace development of water infrastructure in many countries, desalination (the removal of salts from seawater) at high energy efficiency will likely become a vital source of fresh water. Due to its atomic thinness combined with its mechanical strength, porous graphene may be particularly well-suited for electrodialysis desalination, in which ions are removed under an electric field via ion-selective pores. Here, we show that single graphene nanopores preferentially permit the passage of K+ cations over Cl− anions with selectivity ratios of over 100 and conduct monovalent cations up to 5 times more rapidly than divalent cations. Surprisingly, the observed K+/Cl− selectivity persists in pores even as large as about 20 nm in diameter, suggesting that high throughput, highly selective graphene electrodialysis membranes can be fabricated without the need for subnanometer control over pore size.
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The chemistry of graphene oxide
Dreyer, D. R., Park, S., Bielawski, C. W., & Ruoff, R. S. (2010) · Chem. Soc. Rev. · doi:10.1039/b917103g · Cited by 11,653
Cited by
Rao, R., Pint, C. L., Islam, A. E., Weatherup, R. S., Hofmann, S., Meshot, E. R., Wu, F., Zhou, C., Dee, N., Amama, P. B., et al. (2018) · ACS Nano · doi:10.1021/acsnano.8b06511 · Cited by 588
2D materials as an emerging platform for nanopore-based power generation
Macha, M., Marion, S., Nandigana, V. V. R., & Radenovic, A. (2019) · Nature Reviews Materials · doi:10.1038/s41578-019-0126-z · Cited by 426
Intrapore energy barriers govern ion transport and selectivity of desalination membranes
Zhou, X., Wang, Z., Epsztein, R., Zhan, C., Li, W., Fortner, J. D., Pham, T. A., Kim, J.-H., & Elimelech, M. (2020) · Science Advances · doi:10.1126/sciadv.abd9045 · Cited by 367
Metadata
- Authors
- Rollings, R. C., Kuan, A. T., & Golovchenko, J. A.
- Venue
- Nature Communications
- Published
- 2016-04-22
- Volume
- 7
- Issue
- 1
- Pages
- 11408-11408
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2340538439
- Cited by
- 521
- References
- 1
- FWCI
- 23.10
- Type
- journal article
- Language
- en
- Open access
- gold
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- Rollings, R. C., Kuan, A. T., & Golovchenko, J. A. (2016). Ion selectivity of graphene nanopores. Nature Communications. https://doi.org/10.1038/ncomms11408
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