Imperial College London
Portrait Picture

Dr Qilei Song

Faculty of Engineering, Department of Chemical Engineering

Reader in Chemical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 5623q.song Website CV

 
 
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Location

 

ACEX 409AACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rong:2016:10.1016/j.elecom.2016.05.019,
author = {Rong, Y and Song, Q and Mathwig, K and Madrid, E and He, D and Niemann, RG and Cameron, P and Dale, S and Bending, S and Carta, M and Malpass-Evans, R and McKeown, N and Marken, F},
doi = {10.1016/j.elecom.2016.05.019},
journal = {Electrochemistry Communications},
pages = {41--45},
title = {pH-Induced Reversal of Ionic Diode Polarity in 300 nm Thin Membranes Based on a Polymer of Intrinsic Microporosity},
url = {http://dx.doi.org/10.1016/j.elecom.2016.05.019},
volume = {69},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - “Ionic diode” (or current rectification) effects are potentially important for a range of applications including water purification. In this preliminary report, we observe novel ionic diode behaviour of thin (300 nm) membranes based on a polymer of intrinsic microporosity (PIM-EA-TB) supported on a poly-ethylene-terephthalate (PET) film with a 20 μm diameter microhole, and immersed in aqueous electrolyte media. Current rectification effects are observed for half-cells with the same electrolyte solution on both sides of the membrane for cases where cation and anion mobility differ (HCl, other acids, NaOH, etc.) but not for cases where cation and anion mobility are more alike (LiCl, NaCl, KCl, etc.). A pH-dependent reversal of the ionic diode effect is observed and discussed in terms of tentatively assigned mechanisms based on both (i) ion mobility within the PIM-EA-TB nano-membrane and (ii) a possible “mechanical valve effect” linked to membrane potential and electrokinetic movement of the membrane as well as hydrostatic pressure effects.
AU  - Rong,Y
AU  - Song,Q
AU  - Mathwig,K
AU  - Madrid,E
AU  - He,D
AU  - Niemann,RG
AU  - Cameron,P
AU  - Dale,S
AU  - Bending,S
AU  - Carta,M
AU  - Malpass-Evans,R
AU  - McKeown,N
AU  - Marken,F
DO  - 10.1016/j.elecom.2016.05.019
EP  - 45
PY  - 2016///
SN  - 1873-1902
SP  - 41
TI  - pH-Induced Reversal of Ionic Diode Polarity in 300 nm Thin Membranes Based on a Polymer of Intrinsic Microporosity
T2  - Electrochemistry Communications
UR  - http://dx.doi.org/10.1016/j.elecom.2016.05.019
UR  - http://hdl.handle.net/10044/1/33330
VL  - 69
ER  -
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