Li Qin, Gao Wenbin, Zhang Xiaopeng, Liu Haitao, Dou Meiling, Zhang Zhengping, Wang Feng
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology Beijing 100029 China.
Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology Beijing 100029 China
RSC Adv. 2018 Apr 10;8(24):13401-13407. doi: 10.1039/c8ra01313f. eCollection 2018 Apr 9.
Exploring the sensitive and reliable methods for the determination of hydrogen peroxide (HO) is a crucial issue for the health and environmental challenges. Herein, we demonstrate a facile, but rational and effective solvothermal approach to the synthesis of hierarchical NiO mesoporous nanospheres (NiO-MNS) as an effective non-enzymatic sensor towards the HO detection. Owing to the intercalation and stabilization effect of polyethylene glycol for the Ni(OH) intermediate, the NiO mesoporous nanosphere (NiO-MNS) product is consistent with the low-dimensional nanostructured NiO blocks with large surface area and plentiful mesopores after the calcination treatment. The obtained NiO-MNS sensor presents superior electrochemical performance with a high sensitivity (236.7 μA mM cm) and low limit of detection (0.62 μM), as well as the good selectivity and reliability for the further application of HO detection. In addition, the unraveling mechanism of the mesopores formation derived from the measurements also offers the valuable guidance for the future design of porous materials for electrochemical devices and other applications.
探索用于测定过氧化氢（HO）的灵敏且可靠的方法，对于健康和环境挑战而言是一个关键问题。在此，我们展示了一种简便但合理且有效的溶剂热法，用于合成分级结构的NiO介孔纳米球（NiO-MNS），作为一种用于HO检测的有效非酶传感器。由于聚乙二醇对Ni(OH)中间体的插层和稳定作用，经过煅烧处理后，NiO介孔纳米球（NiO-MNS）产物与具有大表面积和丰富介孔的低维纳米结构NiO块体一致。所制备的NiO-MNS传感器具有优异的电化学性能，灵敏度高（236.7 μA mM cm）、检测限低（0.62 μM），并且对于HO检测的进一步应用具有良好的选择性和可靠性。此外，由测量得出的介孔形成的解析机制，也为未来设计用于电化学器件及其他应用的多孔材料提供了有价值的指导。
