Department of Materials Science and Engineering, School of Engineering, Shiraz University, Zand Boulevard, Shiraz, 7134851154, Iran.
Department of Chemistry, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, 151-747, Republic of Korea.
Mikrochim Acta. 2017 Dec 18;185(1):57. doi: 10.1007/s00604-017-2558-8.
The effect of graphene nanosheets on the glucose sensing performance of CuO powders was investigated. CuO and graphene-modified CuO nanoparticles (NPs) were fabricated by microwave-assisted synthesis and characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The material was placed on a glassy carbon electrode (GCE) which then was characterized by cyclic voltammetry and chronoamperometry with respect to the capability of sensing glucose both at pH 13 and pH 7.4. The results revealed that the modified GCE has a fast and selective linear response to glucose at pH 13 that covers the 0.21 μM to 12 mM concentration range, with a 0.21 μM low detection limit. The presence of graphene nanosheets results in an improved sensitivity which is to 700 μA mM cm. In solution of pH 7.4, the respective data are a linear analytical range from 5 to 14 mM; a 5 μM LOD and a sensitivity of 37.63 μA mM cm at working potential of -0.05 V (vs. Ag/AgCl) and scan rate of 50 mV s. Ascorbic acid, dopamine, uric acid, sucrose, maltose and fructose do not interfere. Graphical abstract ᅟ.
研究了石墨烯纳米片对 CuO 粉末葡萄糖传感性能的影响。通过微波辅助合成制备了 CuO 和石墨烯修饰的 CuO 纳米粒子（NPs），并通过 X 射线衍射、透射电子显微镜和 X 射线光电子能谱对其进行了表征。将该材料置于玻碳电极（GCE）上，然后通过循环伏安法和计时安培法对其在 pH 13 和 pH 7.4 下的葡萄糖传感性能进行了表征。结果表明，修饰后的 GCE 在 pH 13 下对葡萄糖具有快速和选择性的线性响应，涵盖了 0.21 μM 至 12 mM 的浓度范围，检测限低至 0.21 μM。石墨烯纳米片的存在导致灵敏度提高到 700 μA mM cm。在 pH 7.4 的溶液中，相应的数据是线性分析范围从 5 到 14 mM；在工作电位为-0.05 V（相对于 Ag/AgCl）和扫描速率为 50 mV s 时，检测限为 5 μM，灵敏度为 37.63 μA mM cm。抗坏血酸、多巴胺、尿酸、蔗糖、麦芽糖和果糖没有干扰。
