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“Dry” NiCo2O4 Nanorods for Electrochemical Non-enzymatic Glucose Sensing
Feng-chao Sun1, Jing-tong Zhang2, Hao Ren*2, Shu-tao Wang1, Yan Zhou*1, Jun Zhang2
1.College of Science, China University of Petroleum (East China), Qingdao 266580, China;2.College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
Abstract:
A rod-like NiCo2O4 modified glassy carbon electrode was fabricated and used for non-enzymatic glucose sensing. The NiCo2O4 was prepared by a facile hydrothermal reaction and subsequently treated in a commercial microwave oven to eliminate the residual water introduced during the hydrothermal procedure. Structural analysis showed that there was no significant structural alteration before and after microwave treatment. The elimination of water residuals was confirmed by the stoichiometric ratio change by using element analysis. The microwave treated NiCo2O4 (M-NiCo2O4) showed excellent performance as a glucose sensor (sensitivity 431.29 μA·mmol/L-1·cm-2). The sensing performance decreases dramatically by soaking the M-NiCo2O4 in water. This result indicates that the introduction of residual water during hydrothermal process strongly affects the electrochemical performance and microwave pre-treatment is crucial for better sensory performance.
Key words:  Glucose sensor, Electrochemical, NiCo2O4, Hydrothermal
FundProject:
“无水”NiCo2O4纳米棒在电化学无酶葡萄糖传感中的应用
孙凤超1, 张景彤2, 任 浩*2, 王淑涛1, 周 炎*1, 张 军2
1.中国石油大学(华东)理学院,青岛 266580;2.中国石油大学(华东)化学工程学院,青岛 266580
摘要:
本文介绍了棒状NiCo2O4的制备,并将其修饰玻碳电极作为无酶葡萄糖传感器. 通过简单的水热反应合成了NiCo2O4,然后在商用微波炉中对NiCo2O4进行处理,以消除水热合成过程中可能引入的残存水. 扫描电镜、透射电镜、X射线衍射谱和X射线光电子能谱分析表明,微波处理前后结构无变化. 通过EDS对Ni,Co,O原子比例的分析,证明微波处理对残存水的消除作用. 微波处理的NiCo2O4(M-NiCo2O4)作为葡萄糖传感器的灵敏度高达431.29 μA mM-1 cm-2. 最后,将M-NiCo2O4在水中浸泡不同时间后,其对葡萄糖的感应性能下降. 结果表明,水热过程中引入的残存水对其电化学性能有很强的影响,微波预处理对其电化学性能也有着重要的影响.
关键词:  无酶葡萄糖传感器,微波预处理,残存水
DOI:10.1063/1674-0068/31/cjcp1804061
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