Single-Walled Carbon Nanotubes Functionalized with N-(6-aminohexyl) Carboxamide as Ionophore for Sensing Silver Ions
- Autores: Mehdizadeh K.1, Giahi M.2, Aghaie H.1
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Afiliações:
- Department of Chemistry, Science and Research Branch
- Department of Chemistry, Lahijan Branch
- Edição: Volume 73, Nº 4 (2018)
- Páginas: 383-389
- Seção: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/183007
- DOI: https://doi.org/10.1134/S1061934818040093
- ID: 183007
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Resumo
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.
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Sobre autores
K. Mehdizadeh
Department of Chemistry, Science and Research Branch
Email: giahi_m@yahoo.com
Irã, Tehran
M. Giahi
Department of Chemistry, Lahijan Branch
Autor responsável pela correspondência
Email: giahi_m@yahoo.com
Irã, Lahijan
H. Aghaie
Department of Chemistry, Science and Research Branch
Email: giahi_m@yahoo.com
Irã, Tehran