Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.electacta.2010.04.025
Title: Ion-selective detection of non-intercalating Na+ using competitive inhibition of K+ intercalation in Prussian blue nanotubes sensor
Authors: Ang, J.Q.
Nguyen, B.T.T.
Huang, Y.
Toh, C.-S. 
Keywords: Hexacyanoferrate
Ion-selective electrode
Membrane
Potassium
Prussian blue
Sensor
Sodium
Issue Date: 30-Nov-2010
Citation: Ang, J.Q., Nguyen, B.T.T., Huang, Y., Toh, C.-S. (2010-11-30). Ion-selective detection of non-intercalating Na+ using competitive inhibition of K+ intercalation in Prussian blue nanotubes sensor. Electrochimica Acta 55 (27) : 7903-7908. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2010.04.025
Abstract: A nanotubes sensor for Na+ is fabricated using electrodeposition of iron hexacyanoferrate polymer within the nanochannels of a nanoporous metal-coated membrane. The sensing signal is derived from the influence of Na+ on the cathodic peak potential of the voltammetric response of the Prussian blue (PB) nanotubes immersed in a background solution containing K+, giving a 2K+:1e- Nernstian response, instead of the usual 1K+:1e- process in the absence of Na+. A competitive-inhibition reaction scheme is proposed which gives excellent agreement of theoretical values derived from equilibrium consideration, with experimental data obtained under reversible, slow scan rate conditions. A wide linear range over three orders of magnitude for Na sensing can be achieved by simple adjustment of background K+ levels. Specific and accurate detection of Na+ using the PB nanotubes sensor is demonstrated in a solution containing potential interfering ions: K +, Mg2+, Ca2+. © 2010 Elsevier Ltd. All rights reserved.
Source Title: Electrochimica Acta
URI: http://scholarbank.nus.edu.sg/handle/10635/95476
ISSN: 00134686
DOI: 10.1016/j.electacta.2010.04.025
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

6
checked on Sep 13, 2018

WEB OF SCIENCETM
Citations

7
checked on Sep 5, 2018

Page view(s)

43
checked on Jul 6, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.