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The inductive effect of montmorillonite/polyether sulfone membrane during the ion diffusion process
Abstract In this paper, montmorillonite (Mt), as an inexpensive 2D material, was employed to prepare an assembled montmorillonite/Poly ether sulfone (Mt/PES) membrane using a vacuum filtration method. The Mt./PES membrane was then subjected to diffusion tests using KCl solution. Energy dispersive X-ray spectroscopy (EDX) results confirm the Mt./PES membrane exhibits obvious ion selectivity that more cations can enter into the interlayer space of Mt. sheets than anions. The membranes immersed in electrolytes for different time were probed by electrochemical impedance spectroscopy (EIS). An interesting consequence, that a clear inductive signal at low frequencies, was detected. Moreover, thicker Mt. layer, lower electrolyte concentration (< 0.1 mol/L), or shorter diffusing time (< 10 min) would dramatically enhance the inductance of Mt./PES membrane during the diffusion process. The inductive signal could be contributed to the uneven distribution of ions in Mt./PES membrane. In other words, the inductance probed by EIS was influenced by the Mt. sheets characteristics, electrolyte concentration and diffusing time. The tunable conductance of Mt./PES membrane might be potentially applied as a component for nanoelectronic device.
Highlights It was found an inductive signal when the montmorillonite membrane immersing in the electrolyte. The inductive effect can be adjusted by the thickness of montmorillonite layer or electrolyte concentration. The inductive effect was contributed to the uneven distribution of ions in montmorillonite layer.
The inductive effect of montmorillonite/polyether sulfone membrane during the ion diffusion process
Abstract In this paper, montmorillonite (Mt), as an inexpensive 2D material, was employed to prepare an assembled montmorillonite/Poly ether sulfone (Mt/PES) membrane using a vacuum filtration method. The Mt./PES membrane was then subjected to diffusion tests using KCl solution. Energy dispersive X-ray spectroscopy (EDX) results confirm the Mt./PES membrane exhibits obvious ion selectivity that more cations can enter into the interlayer space of Mt. sheets than anions. The membranes immersed in electrolytes for different time were probed by electrochemical impedance spectroscopy (EIS). An interesting consequence, that a clear inductive signal at low frequencies, was detected. Moreover, thicker Mt. layer, lower electrolyte concentration (< 0.1 mol/L), or shorter diffusing time (< 10 min) would dramatically enhance the inductance of Mt./PES membrane during the diffusion process. The inductive signal could be contributed to the uneven distribution of ions in Mt./PES membrane. In other words, the inductance probed by EIS was influenced by the Mt. sheets characteristics, electrolyte concentration and diffusing time. The tunable conductance of Mt./PES membrane might be potentially applied as a component for nanoelectronic device.
Highlights It was found an inductive signal when the montmorillonite membrane immersing in the electrolyte. The inductive effect can be adjusted by the thickness of montmorillonite layer or electrolyte concentration. The inductive effect was contributed to the uneven distribution of ions in montmorillonite layer.
The inductive effect of montmorillonite/polyether sulfone membrane during the ion diffusion process
Chen, Zhe (author) / Luo, Shuting (author) / Yao, Lei (author) / Zhang, Yong (author) / Lin, Zhidong (author) / Wang, Shenggao (author)
Applied Clay Science ; 203
2021-01-25
Article (Journal)
Electronic Resource
English
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