Nanoparticles-assembled NiO nanosheets templated by graphene oxide film for highly sensitive non-enzymatic glucose sensing

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• 作者：Haiyan Zhang^aAuthor Vitae ; Sen Liu^b ; ^{liusen@jlu.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：NiO nanosheets ; Nanoparticles-assembled ; Graphene oxide film ; Template ; Glucose sensing
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：238
• 期：Complete
• 页码：788-794
• 全文大小：1629 K

文摘

Nanoparticles-assembled NiO nanosheets have been successfully prepared using graphene oxide (GO) film as template, where the Ni²⁺ ion was firstly adsorbed in GO film, followed by calcination in N₂ to form NiO-based materials and calcination in air to remove carbon-based template. The morphology, structure, and electrochemical activities of these NiO nanosheets were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM) and electrochemical techniques, respectively. It is found that the NiO nanosheets thus obtained could electrochemically catalyze glucose oxidation in 0.1 M NaOH, leading to fabrication of non-enzymatic glucose sensor. The glucose sensor based on NiO nanosheets exhibits detection limit of 0.18 μM, and linear range from 1 μM to 0.4 mM with the sensitivity of 1138 μA mM⁻² cm⁻². Furthermore, such glucose sensor also shows excellent selectivity for detection of glucose, compared to the commonly interfering species, such as ascorbic acid, dopamine, and uric acid.