An original functionalization way of a gold electrode for the detection of nitrates at low level in seawater

E. Lebon Tailhades 1 Pierre Fau 1 Myrtil Kahn 1 Maurice Comtat 2 Pierre Temple-Boyer 3 Philippe Behra 4 Brigitte Dubreuil 4 Katia Fajerwerg 1
1 LCC - Laboratoire de chimie de coordination
2 LGC - Laboratoire de génie chimique [ancien site de Basso-Cambo]
3 LAAS-MICA - Équipe MICrosystèmes d'Analyse
LAAS - Laboratoire d'analyse et d'architecture des systèmes
4 LCA - Laboratoire de Chimie Agro-Industrielle
Abstract : Determination and quantification of nitrates are considered to be essential. Indeed, they are a well-known contaminant of ground and stream water. Nitrate is an important environmental and human health analyte (1,2). In the specific area of oceanography, there is a growing demand for the ocean observations and for a better understanding of biogeochemical cycles and mixing of water masses. So, the development of simple, low-power, sensitive, selective and stable analytical in-situ sensors appears as a necessity. The aim of this study is to develop an electrochemical sensor in order to measure nitrates at very low concentrations (nanomolar) in seawater (pH ca 6). We present here an original way for the functionalization of a gold electrode (EAu) using an organometallic silver precursor in order to obtain well dispersed silver nanoparticles (AgNP) with small sizes and narrow distribution. The advantage of this resulting nanostructured surface combines the electrochemical properties of the gold electrode and the presence of silver nanoparticles AgNPs (3) (Figure 1). This was shown in previous works dedicated to electrodeposited Ag nanoparticles (AgNPs) in aqueous medium using a silver salt (AgNO3). The results obtained for different synthetic NO3-solutions using the proposed AgNP-modified-gold electrode will be discussed. Fig.1. Mechanism of electroreduction of NO3-ions on a AgNP-modified gold electrode.
Document type :
Conference papers
Complete list of metadatas

Cited literature [2 references]  Display  Hide  Download
https://hal.laas.fr/hal-01871449
Contributor : Pierre Temple-Boyer <>
Submitted on : Monday, September 10, 2018 - 6:48:49 PM
Last modification on : Friday, November 1, 2019 - 1:22:18 AM
Long-term archiving on : Tuesday, December 11, 2018 - 4:15:01 PM

File

Abstract_ElecNano_2016_vf.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-01871449, version 1

Collections

LAAS | CNRS | INRA | INC-CNRS | INSA-TOULOUSE | LAAS-MICA | LAAS-MICRO-NANO-BIO-TECHNOLOGIES | INSA-GROUPE | UNIV-TLSE3 | UT1-CAPITOLE | UNIV-TLSE2 | IRD

Citation

E. Lebon Tailhades, Pierre Fau, Myrtil Kahn, Maurice Comtat, Pierre Temple-Boyer, et al.. An original functionalization way of a gold electrode for the detection of nitrates at low level in seawater. 7th meeting "Electrochemistry in nanosciences", ElecNano 2016, May 2016, Lille, France. 1p. ⟨hal-01871449⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

70

Files downloads

22

CONTACT

scd.ao@univ-tlse3.fr