1-Furoylthiourea-Sonogel-Carbon electrodes: Structural and electrochemical characterization

A new type of sensor based on Sonogel-Carbon materials modified with 1-(2-furoyl)-3-(1-naphthyl)thiourea is presented to be used as an amperometric sensor for metals. Different percentages of modifier were tested in order to optimise the structural and mechanical properties, as well as the electroch...

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Bibliographic Details
Published in:Talanta (Oxford) 2010-06, Vol.82 (1), p.129-136
Main Authors: Cubillana-Aguilera, Laura M a, Palacios-Santander, José M a, Estévez-Hernández, Osvaldo L., Naranjo-Rodríguez, Ignacio, Hidalgo-Hidalgo de Cisneros, José Luis
Format: Article
Language:English
Subjects:
1-(2-Furoyl)-3-(1-naphthyl)thiourea-Sonogel-Carbon electrode
Analytical chemistry
Anodic stripping
Anodic stripping differential pulse voltammetry
Chemistry
Diffraction
Electrochemical methods
Electrodes
Exact sciences and technology
Fourier transform-infrared spectroscopy
General, instrumentation
Mechanical properties
Scanning electron microscopy
Sensors
Sonogel-Carbon material
Spectrometric and optical methods
Spectroscopy
X-ray diffraction
X-rays
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Summary:A new type of sensor based on Sonogel-Carbon materials modified with 1-(2-furoyl)-3-(1-naphthyl)thiourea is presented to be used as an amperometric sensor for metals. Different percentages of modifier were tested in order to optimise the structural and mechanical properties, as well as the electrochemical behaviour. Scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS), Fourier transform-infrared spectroscopy (FTIR), single crystal X-ray diffraction (XRD) and powder XRD were used for the structural characterization of these electrodes. The 1-(2-furoyl)-3-(1-naphthyl)thiourea did not modify significantly the structural and mechanical properties of the Sonogel-Carbon electrodes, being similar to other modifications carried out previously in these materials. For the study of the electrochemical response, anodic stripping differential pulse voltammetry (ASDPV) was employed, optimising other parameters of measurement such as pH of the buffer, potential and accumulation time and pulse amplitude. The electrochemical response of the modified electrodes improved significantly with respect to the non-modified electrode, giving good signals and acceptable detection limit.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2010.04.005