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

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• 作者：Laura M Cubillana-Aguilera ; José ; M Palacios-Sant ; er ; Osvaldo L. Esté ; vez-Herná ; ndez ; Ignacio Naranjo-Rodrí ; guez ; José ; Luis Hidalgo-Hidalgo de Cisneros
• 关键词：Sonogel-Carbon material ; 1-(2-Furoyl)-3-(1-naphthyl)thiourea-Sonogel-Carbon electrode ; Anodic stripping differential pulse voltammetry ; Scanning electron microscopy ; Fourier transform-infrared spectroscopy ; X-ray diffraction
• 刊名：Talanta
• 出版年：2010
• 出版时间：30 June 2010
• 年：2010
• 卷：82
• 期：1
• 页码：129-136
• 全文大小：989 K

文摘

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.