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Chemosensors 2018, 6(4), 50; https://doi.org/10.3390/chemosensors6040050

In Situ Metalorganic Deposition of Silver Nanoparticles on Gold Substrate and Square Wave Voltammetry: A Highly Efficient Combination for Nanomolar Detection of Nitrate Ions in Sea Water

1
Laboratoire de Chimie de Coordination, UPR 8241 CNRS, 205 Route de Narbonne, 31077 Toulouse Cedex 4, France
2
RTRA “Sciences et Technologies pour l’Aéronautique et l’Espace”, F-31030 Toulouse, France
3
Université Paul Sabatier, UT III, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
4
Laboratoire de Génie Chimique, UMR CNRS 5503, 118, route de Narbonne, 31062 Toulouse CEDEX 9, France
5
Laboratoire d’Analyse et d’Architecture des Systèmes (LAAS), 31400 Toulouse, France (CNRS)
6
Laboratoire de Chimie Agro-industrielle (LCA), Université de Toulouse, INRA, INPT, 31030 Toulouse Cedex 4, France
*
Authors to whom correspondence should be addressed.
Received: 13 August 2018 / Revised: 29 October 2018 / Accepted: 29 October 2018 / Published: 6 November 2018
(This article belongs to the Special Issue Nanomaterial Based Chemical Sensors)
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Abstract

The electro-reduction of nitrate ions in artificial sea water was investigated at a gold substrate (EAu) functionalized by silver nanoparticles (AgNPs). These AgNPs were generated in situ on the gold substrate by the direct decomposition of the metalorganic N,N′-diisopropylacetamidinate silver precursor [Ag(Amd)] in the liquid phase. Very small and well dispersed AgNPs were deposited on the gold electrode and then used as working electrode (EAu/AgNPs). Square wave voltammetry (SWV) was successfully employed to detect nitrate ions (NO3) with a detection limit (LOD) of 0.9 nmol∙L−1 in artificial sea water (pH = 6.0) without pre-concentration or pH adjustment. View Full-Text
Keywords: silver metalorganic precursor; silver nanoparticles; nitrate detection; square wave voltammetry; sea water silver metalorganic precursor; silver nanoparticles; nitrate detection; square wave voltammetry; sea water
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Lebon, E.; Fau, P.; Comtat, M.; Kahn, M.L.; Sournia-Saquet, A.; Temple-Boyer, P.; Dubreuil, B.; Behra, P.; Fajerwerg, K. In Situ Metalorganic Deposition of Silver Nanoparticles on Gold Substrate and Square Wave Voltammetry: A Highly Efficient Combination for Nanomolar Detection of Nitrate Ions in Sea Water. Chemosensors 2018, 6, 50.

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