Single-Walled Carbon Nanotubes Functionalized with N-(6-aminohexyl) Carboxamide as Ionophore for Sensing Silver Ions
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...
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Published in | Journal of analytical chemistry (New York, N.Y.) Vol. 73; no. 4; pp. 383 - 389 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Moscow
Pleiades Publishing
01.04.2018
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | 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 d
E
°/d
T
was determined as 0.00011 V/grad. Thermodynamic functions such as Δ
S
°, Δ
H
° and Δ
G
° were obtained by calculating the thermal coefficient of the electrode. |
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ISSN: | 1061-9348 1608-3199 |
DOI: | 10.1134/S1061934818040093 |