Chang Han-Wei, Dong Chung-Li, Chen Yan-Hua, Xu Yuan-Zhang, Huang Tzu-Chi, Chen Song-Chi, Liu Feng-Jiin, Lai Yin-Hung, Tsai Yu-Chen
Department of Chemical Engineering, National United University, Miaoli 360302, Taiwan.
Pesticide Analysis Center, National United University, Miaoli 360302, Taiwan.
Nanomaterials (Basel). 2021 Oct 28;11(11):2881. doi: 10.3390/nano11112881.
A simple, efficient, and cost-effective extended graphite as a supporting platform further supported the MnO growth for the construction of hierarchical flower-like MnO/extended graphite. MnO/extended graphite exhibited an increase in sp carbon bonds in comparison with that of extended graphite. It can be expected to display better electrical conductivity and further promote electron/ion transport kinetics for boosting the electrochemical performance in supercapacitors and glucose sensing. In supercapacitors, MnO/extended graphite delivered an areal capacitance value of 20.4 mF cm at 0.25 mA cm current densities and great cycling stability (capacitance retention of 83% after 1000 cycles). In glucose sensing, MnO/extended graphite exhibited a good linear relationship in glucose concentration up to about 5 mM, sensitivity of 43 μA mMcm, and the limit of detection of 0.081 mM. It is further concluded that MnO/extended graphite could be a good candidate for the future design of synergistic multifunctional materials in electrochemical techniques.
一种简单、高效且经济高效的扩展石墨作为支撑平台，进一步支持了MnO的生长，用于构建分层花状MnO/扩展石墨。与扩展石墨相比，MnO/扩展石墨的sp碳键有所增加。可以预期它将表现出更好的导电性，并进一步促进电子/离子传输动力学，以提高超级电容器和葡萄糖传感中的电化学性能。在超级电容器中，MnO/扩展石墨在0.25 mA cm电流密度下的面积电容值为20.4 mF cm，并且具有出色的循环稳定性（1000次循环后电容保持率为83%）。在葡萄糖传感中，MnO/扩展石墨在高达约5 mM的葡萄糖浓度范围内表现出良好的线性关系，灵敏度为43 μA mMcm，检测限为0.081 mM。进一步得出结论，MnO/扩展石墨可能是未来电化学技术中协同多功能材料设计的良好候选者。
