A simple non-enzymatic hydrogen peroxide sensor using gold nanoparticles-graphene-chitosan modified electrode

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• 作者：Ningming JiaAuthor Vitae ; Baozhen HuangAuthor Vitae ; Lina ChenAuthor Vitae ; Liang Tan ; ^{liangtan@hunnu.edu.cn" class="auth_mail}Author Vitae ; Shouzhuo YaoAuthor Vitae
• 关键词：Gold nanoparticles ; Graphene ; Chitosan ; Chemically modified electrode ; Hydrogen peroxide ; Direct electrochemistry
• 刊名：Sensors and Actuators B: Chemical
• 出版年：May, 2014
• 年：2014
• 卷：195
• 期：Complete
• 页码：165-170
• 全文大小：1033 K

文摘

Gold nanoparticles (GNPs) were electrochemically deposited on the graphene and chitosan modified glassy carbon electrode and characterized by scanning electron microscope and cyclic voltammetry, respectively. A simple non-enzymatic H₂O₂ sensor was developed based on the direct electrochemistry of H₂O₂ in the presence of GNPs. Under the optimized conditions, the fabricated electrode displayed a linear response in the H₂O₂ concentration range from 5.0 渭M to 35 mM with a detection limit of 1.6 渭M estimated at a signal-to-noise ratio of 3. The proposed sensor presented some advantages including simple operation procedure, wide linear range, low detection limit, fast response time as well as good anti-interference performance, stability and reproducibility, which indicate it can act as a promising electrochemical platform for H₂O₂ detection.