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Vol. 27, Special Issue, May 2014, pp. 366-370




Study and Comparison Between Two Gold Electrodes Functionalized with Two Calix [8] Arenes
for the Detection of Cadmium in Water


1 Université de Jijel, BP 98, Ouled Aissa, 18000 Jijel, Algeria
2 Université de Lyon - LSA - UMR 5180 CNRS - Université Claude Bernard Lyon 1, 69622 Villeurbanne cedex, France
Tel.: +213 774000720

E-mail: azazoua@yahoo.fr


Received: 23 November 2013 /Accepted: 12 January 2014 /Published: 26 May 2014

Digital Sensors and Sensor Sysstems


Abstract: In our work, we compared the performance of two calix 8 arenes, p-tert-butyl-calix 8 arene-tétracétone and p-tert-butyl-calix 8 arene-tetraester for cadmium detection in an aqueous medium. Both sensors were characterized by two electrochemically methods, impedance spectroscopy to evaluate the behavior of the sensitive membrane relative to the cation to be detected and cyclic voltammetry to understand the phenomena occurring at the solid-liquid interfaces. We completed our study by two physico-chemical methods. Fourier Transform Infrared spectroscopy (FTIR) and UV-Visible spectroscopy to understand the process of complexation between ionophores and the cations detected. The results of analyzes by UV-Visible and FTIR spectroscopy showed the formation of a complex between the ligand and cadmium ions. The impedance measurements showed an increase in sensor response proportionally with the increase of the concentration of the metal cation indicating sensitivity of the devices with a detection limit of 10-8 M. P-tert-butyl-calix 8 arene-ligand tetraester is most advantageous from the point of view sensitivity to cadmium ions.


Keywords: Calix[8]Arene, Cadmium, Electrochemical sensors, Impedance spectroscopy, P-tert-butyl-calix [8] Arene-étracétone.


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