Lv Jian, Kong Chuncai, Hu Xuanxuan, Zhang Xiaojing, Liu Ke, Yang Shengchun, Bi Jinglei, Liu Xiaoyan, Meng Ge, Li Jianhui, Yang Zhimao, Yang Sen
School of Science, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China.
J Mater Chem B. 2017 Nov 28;5(44):8686-8694. doi: 10.1039/c7tb01971h. Epub 2017 Oct 19.
Morphology control is expected to be an effective method to enhance the electrochemical properties of materials. In this work, zinc cation-mediated growth of CuO crystals was achieved via an aqueous chemical route at room temperature. Thus, by simply increasing the concentration of Zn, concave cube-like (C-CuO), porous (P-CuO), and hierarchical (H-CuO) CuO crystals were selectively obtained. The morphologies and structures of the as-prepared CuO crystals were characterized by SEM, TEM, XRD and XPS. The three materials were subsequently employed as active materials for the non-enzymatic detection of glucose. The H-CuO-based electrode exhibited the highest sensitivity (3076 μA mM cm) in virtue of its highest surface area, while the P-CuO-based electrode showed the widest linear range (up to 24 mM). The reliability of the CuO-based glucose sensors was proved by determining their detection limit, response time, selectivity, and stability characteristics on human serum samples. This work provides a novel strategy for the morphology-controlled Zn-mediated fabrication of CuO crystals with different glucose sensing performances depending on their structures.
形态控制有望成为增强材料电化学性能的有效方法。在这项工作中，通过室温下的水相化学路线实现了锌阳离子介导的CuO晶体生长。因此，通过简单地增加Zn的浓度，选择性地获得了凹立方状（C-CuO）、多孔（P-CuO）和分级结构（H-CuO）的CuO晶体。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）和X射线光电子能谱（XPS）对所制备的CuO晶体的形态和结构进行了表征。随后，将这三种材料用作葡萄糖非酶检测的活性材料。基于H-CuO的电极因其最大的表面积而表现出最高的灵敏度（3076 μA mM cm），而基于P-CuO的电极则显示出最宽的线性范围（高达24 mM）。通过测定基于CuO的葡萄糖传感器在人血清样品上的检测限、响应时间、选择性和稳定性特征，证明了其可靠性。这项工作为通过锌介导的形态控制制备具有不同葡萄糖传感性能的CuO晶体提供了一种新策略，这些性能取决于它们的结构。
