Journal of Nanomaterials & Molecular NanotechnologyISSN: 2324-8777

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Research Article, J Nanomater Mol Nanotechnol Vol: 4 Issue: 4

Sensing Element Based on a New Nanoparticle to Develop a Carbon past Electrode for Highly Sensitive Determination of Ag+ in Aqueous Solutions

Abdollah Yari*, Marzieh Bagheri and Marzieh Saeidikhah
Deparment of analytical chemistry, Lorestan University, Khorramabad, Iran
Corresponding author : Abdollah Yari
Deparment of analytical chemistry, Lorestan University, Khorramabad–Iran
Tel/Fax: +98 661 6200612; E-mail: [email protected]
Received: March 28, 2015 Accepted: July 09, 2015 Published: July 15, 2015
Citation: Yari A, Bagheri M, Saeidikhah M (2015) Sensing Element Based on a New Nanoparticle to Develop a Carbon past Electrode for Highly Sensitive Determination of Ag+ in Aqueous Solutions. J Nanomater Mol Nanotechnol 4:4. doi:10.4172/2324-8777.1000166

Abstract

Sensing Element Based on a New Nanoparticle to Develop a Carbon past Electrode for Highly Sensitive Determination of Ag+ in Aqueous Solutions

Here, we report the use of newly synthesized amine-functionalized silica nanoparticles (SNP-NH2s), based on multi-walled carbon nanotubes (MWCNTs), as heart of a sensing element for construction a new carbon paste electrode. Then, the modified electrode was successfully applied in Ag+ ion quantification by potentiometric method. The results showed that the modified electrode exhibits a Nernstian slope of -59.8 (±0.2) mV/decade for Ag+ ion in aqueous solution. The potential response of electrode covers a wide concentration range from 1.2×10-1 to 7.0×10-9 M of Ag+. The detection limit of the system was found 5.0×10-9 M while it is independent of the pH from 3.5 to 8.0 and shows a quick response time (45 s) with lifetime of about 2 months. The proposed electrode was successfully used as an indicator sensor in determination silver ion in waste-waters of photographic and radiological films.

Keywords: Carbon nanotubes; Carbon paste electrode; Modifier; Potentiometry; Silica nanoparticles; Silver(I)

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