Nitromethane biosensor based on four heme proteins modified glassy carbon electrodes

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• 作者：Yumin Wang ; Huayu Xiong ; Xiuhua Zhang ; Yong Ye ; Shengfu Wang ; ^{wangsf@hubu.edu.cn}
• 关键词：Biosensor ; Heme proteins ; Nitromethane ; Room temperature ionic liquid ; Sodium carboxymethyl cellulose
• 刊名：Journal of Electroanalytical Chemistry
• 出版年：2012
• 期刊代码：pca22_15726657
• 类别：ce
• 出版时间：1 June, 2012
• 卷：674
• 期：Complete
• 页码：17-22
• 文件大小：662 K

摘要

Detection of nitromethane (CH₃NO₂) has received scientists鈥?attention recently. However, its detection with the direct electrochemical measurement method was reported rarely. In this work, we explore an electrochemical biosensor for CH₃NO₂ based on immobilization of four heme proteins, sodium carboxymethyl cellulose (CMC), room temperature ionic liquid鈥?-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF₄]) and multi-walled carbon nanotubes (MWNTs) biocomposite films. The surface morphologies of the representative heme proteins hybrid films were demonstrated by scanning electron microscopy (SEM). The different parameters, including working potential, pH of supporting electrolyte and the scan rate that governed the performance of the biosensor have been studied in detail and optimized. Electrocatalytic parameters for the determination of CH₃NO₂ with the four heme proteins film electrodes were evaluated by chronoamperometry.