The Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields
The selective transport of ions in nanopores attracts broad interest due to their potential applications in chemical separation, ion filtration, seawater desalination, and energy conversion. The ion selectivity based on the ion dehydration and steric hindrance is still limited by the very similar di...
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2021
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oai:doaj.org-article:60dae82606594179a847f2d6d7c0f18e2021-11-25T18:15:41ZThe Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields10.3390/ma142270121996-1944https://doaj.org/article/60dae82606594179a847f2d6d7c0f18e2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/7012https://doaj.org/toc/1996-1944The selective transport of ions in nanopores attracts broad interest due to their potential applications in chemical separation, ion filtration, seawater desalination, and energy conversion. The ion selectivity based on the ion dehydration and steric hindrance is still limited by the very similar diameter between different hydrated ions. The selectivity can only separate specific ion species, lacking a general separation effect. Herein, we report the highly ionic selective transport in charged nanopore through the combination of hydraulic pressure and electric field. Based on the coupled Poisson–Nernst–Planck (PNP) and Navier–Stokes (NS) equations, the calculation results suggest that the coupling of hydraulic pressure and electric field can significantly enhance the ion selectivity compared to the results under the single driven force of hydraulic pressure or electric field. Different from the material-property-based ion selective transport, this method endows the general separation effect between different kinds of ions. Through the appropriate combination of hydraulic pressure and electric field, an extremely high selectivity ratio can be achieved. Further in-depth analysis reveals the influence of nanopore diameter, surface charge density and ionic strength on the selectivity ratio. These findings provide a potential route for high-performance ionic selective transport and separation in nanofluidic systems.Pengfei MaJianxiang ZhengDanting ZhaoWenjie ZhangGonghao LuLingxin LinZeyuan ZhaoZijing HuangLiuxuan CaoMDPI AGarticleion selectivitymulti-physics fieldscharged nanoporeelectric fieldhydraulic pressureTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 7012, p 7012 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
ion selectivity multi-physics fields charged nanopore electric field hydraulic pressure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
| spellingShingle |
ion selectivity multi-physics fields charged nanopore electric field hydraulic pressure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Pengfei Ma Jianxiang Zheng Danting Zhao Wenjie Zhang Gonghao Lu Lingxin Lin Zeyuan Zhao Zijing Huang Liuxuan Cao The Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields |
| description |
The selective transport of ions in nanopores attracts broad interest due to their potential applications in chemical separation, ion filtration, seawater desalination, and energy conversion. The ion selectivity based on the ion dehydration and steric hindrance is still limited by the very similar diameter between different hydrated ions. The selectivity can only separate specific ion species, lacking a general separation effect. Herein, we report the highly ionic selective transport in charged nanopore through the combination of hydraulic pressure and electric field. Based on the coupled Poisson–Nernst–Planck (PNP) and Navier–Stokes (NS) equations, the calculation results suggest that the coupling of hydraulic pressure and electric field can significantly enhance the ion selectivity compared to the results under the single driven force of hydraulic pressure or electric field. Different from the material-property-based ion selective transport, this method endows the general separation effect between different kinds of ions. Through the appropriate combination of hydraulic pressure and electric field, an extremely high selectivity ratio can be achieved. Further in-depth analysis reveals the influence of nanopore diameter, surface charge density and ionic strength on the selectivity ratio. These findings provide a potential route for high-performance ionic selective transport and separation in nanofluidic systems. |
| format |
article |
| author |
Pengfei Ma Jianxiang Zheng Danting Zhao Wenjie Zhang Gonghao Lu Lingxin Lin Zeyuan Zhao Zijing Huang Liuxuan Cao |
| author_facet |
Pengfei Ma Jianxiang Zheng Danting Zhao Wenjie Zhang Gonghao Lu Lingxin Lin Zeyuan Zhao Zijing Huang Liuxuan Cao |
| author_sort |
Pengfei Ma |
| title |
The Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields |
| title_short |
The Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields |
| title_full |
The Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields |
| title_fullStr |
The Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields |
| title_full_unstemmed |
The Selective Transport of Ions in Charged Nanopore with Combined Multi-Physics Fields |
| title_sort |
selective transport of ions in charged nanopore with combined multi-physics fields |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/60dae82606594179a847f2d6d7c0f18e |
| work_keys_str_mv |
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