Characterization and electrochemical response of sonogel carbon electrode modified with nanostructured zirconium dioxide film

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• 作者：Yongjun Chen ; Suzanne Lunsford ; Dionysios D. Dionysiou
• 关键词：Zirconium dioxide ; Sensor ; Sonogel carbon ; Catechcol ; Acetylacetone ; Electrode
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2009
• 出版时间：28 March 2009
• 年：2009
• 卷：137
• 期：1
• 页码：291-296
• 全文大小：785 K

文摘

A new modified carbon electrode was developed by coating sol–gel derived zirconium dioxide film on the top of graphite carbon electrode, which showed good electrochemical activity and reversibility in the redox process of catechol in acidic aqueous solution (0.1 M H₂SO₄), even in the presence of ascorbic acid (a common interferent). Good electrochemical behavior, including relatively small oxidation and reduction peak separation (ΔE_p = 71 mV), improved sensitivity, and good operation stability and reproducibility, can be explained by specific physicochemical properties of sol–gel derived ZrO₂ film. Such properties include robust and interconnected crystal network structure with high ZrO₂ purity, relatively high BET surface area/pore volume, larger interfacial contact area and good adhesion between ZrO₂ film and sonogel graphite carbon material. This study proved that zirconium dioxide film prepared by such a sol–gel route is a promising electrode material for the development of novel conducting electrodes based on sonogel graphite carbon for the detection of neurotransmitters.