Silver microspheres for application as hydrogen peroxide sensor

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• 作者：Bo Zhao ; Zongrui Liu ; Zhelin Liu ; Guixia Liu ; Zhuang Li ; Jinxian Wang ; Xiangting Dong
• 关键词：Electrochemical sensor ; Nanomaterial ; Silver microspheres ; Hydrogen peroxide
• 刊名：Electrochemistry Communications
• 出版年：2009
• 出版时间：August 2009
• 年：2009
• 卷：11
• 期：8
• 页码：1707-1710
• 全文大小：479 K

文摘

In this paper, we synthesized flowerlike silver microspheres with nanostructures by simply reducing silver nitrate by ascorbic acid in the presence of PVP. The structure was investigated by SEM. The chemical composition was determined by EDX, XRD and XPS. Recent studies on hydrogen peroxide sensor based on silver nanoparticles inspired us to examine the electrocatalytic activity of prepared microspheres. This electrochemical sensor exhibited good electrocatalytic activity towards the reduction of H₂O₂ in 0.2 M phosphate buffer solution (pH 7.0), and the detection limit of H₂O₂ was found to be 1.2 μM, which was lower than certain enzyme-based biosensors.