The Sonogel-Carbon Electrode As a Sol-Gel Graphite-Based Electrode

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• 作者：M del Mar Cordero-Rando ; José ; L. Hidalgo-Hidalgo de Cisneros ; Eduardo Blanco ; and Ignacio Naranjo-Rodr&iacute ; guez
• 刊名：Analytical Chemistry
• 出版年：2002
• 出版时间：May 15, 2002
• 年：2002
• 卷：74
• 期：10
• 页码：2423 - 2427
• 全文大小：64K
• 年卷期：v.74,no.10(May 15, 2002)
• ISSN：1520-6882

文摘

In this work, a novel sol-gel-based procedure to obtainsolid carbon composite electrodes is proposed. Theprocedure is based on the use of sonocatalysis to applyhigh-energy ultrasound directly to the precursors; thisway, ultrasonic cavitation is achieved so that hydrolysiswith acidic water is promoted in the absence of anyadditional solvent and the time needed to get a uniquephase is reduced drastically. The mix of sonogel withspectroscopic grade graphite leads to a new type of sol-gel electrode: the Sonogel-Carbon electrode. The amountof water, necessary for hydrolysis to occur, has beenstudied, as well as the sol pH value and the electrochemical behavior of the Sonogel-Carbon electrode in Britton-Robinson buffer. Mechanical renewal of the electrodessurfaces and background signal stability for at least 42days have been also tested. We have carried out sometests to check the ability of the synthesized material to giveelectrochemical response when redox species are presentin the background electrolyte. Mechanical and electrochemical studies indicate that the Sonogel-Carbon electrode shows good properties for use as an electrochemicalsensor.