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Journal of Analytical Chemistry

, Volume 73, Issue 4, pp 383–389 | Cite as

Single-Walled Carbon Nanotubes Functionalized with N-(6-aminohexyl) Carboxamide as Ionophore for Sensing Silver Ions

  • K. Mehdizadeh
  • M. GiahiEmail author
  • H. Aghaie
Articles
  • 29 Downloads

Abstract

In this work; we constructed a silver ion-selective electrode based on N-(6-aminohexyl) carboxamide functionalized single-walled carbon nanotubes (NAHAFSWCN) as an ionophore. The selectivity constant of a number of cations was measured using silver ion selective electrode. Optimal pH was between 3 and 6 and the upper and lower detection limits of the designed electrode were 1.2 × 10–2 and 8 × 10–7 M. The electrode showed a Nernstian response over a silver ion concentration range of 1 × 10–6 to 1 × 10–2 M with a slope of 59.1 ± 0.5 mV/decade. The response time of the electrode was less than 18 s and its effective lifetime was 3 months. The isothermal temperature coefficient of the electrode dE°/dT was determined as 0.00011 V/grad. Thermodynamic functions such as ΔS°, ΔH° and ΔG° were obtained by calculating the thermal coefficient of the electrode.

Keywords

silver ion-selective thermal coefficient N-(6-aminohexyl) carboxamide carbon nanotubes sensor 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Department of Chemistry, Science and Research BranchIslamic Azad UniversityTehranIran
  2. 2.Department of Chemistry, Lahijan BranchIslamic Azad UniversityLahijanIran

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