3D graphene oxide-cobalt oxide polyhedrons for highly sensitive non-enzymatic electrochemical determination of hydrogen peroxide
3D graphene oxide-cobalt oxide polyhedrons for highly sensitive non-enzymatic electrochemical determination of hydrogen peroxide
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DOI：
10.1016/j.snb.2017.06.172
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发表时间：
2017-12-01
影响因子：
8.4
通讯作者：
Mani, Veerappan
中科院分区：
文献类型：
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作者：
Kogularasu, Sakthivel;Govindasamy, Mani;Mani, Veerappan
采用水热法合成了多面体结构的钴氧化物（Co 3 O 4 PHs）和三维氧化石墨烯包覆的钴氧化物多面体（3D GO-Co 3 O 4 PHs），并用于H2 O2的高灵敏测定。形态学研究清楚地揭示了多面体形状的Co 3 O 4和另外的元素，衍射和电化学研究进行验证的结构和形状。由于Co 3 O 4 PHs与GO之间的良好协同作用，该复合材料具有良好的孔隙率、大的电化学面积、粗糙的表面和优异的电催化性能。H2 O2在生理、生化、医药等方面具有重要的应用价值，因此研制高灵敏度的传感器是十分必要的。本文报道了一种快速、灵敏、选择性好、重复性好、稳定性好的非酶法测定H_2O_2的方法。该传感器具有良好的灵敏度，检测限为15 nM，这是上级优于以前报道的传感器。在市售接触透镜和消毒剂清洁溶液中证明了实时分析，无需预处理。(C)2017爱思唯尔B. V.保留所有权利。
Polyhedrons structured cobalt oxide (Co3O4 PHs) and three-dimensional graphene oxide encapsulated cobalt oxide polyhedrons (3D GO-Co3O4 PHs) were synthesized via facile hydrothermal synthetical route for the highly sensitive determination of hydrogen peroxide (H2O2). The morphological study clearly revealed the polyhedron shaped Co3O4 and additionally elemental, diffraction, and electrochemical studies were performed to verify the structure and shape. Owing to excellent synergy between Co3O4 PHs and GO, the composite possesses good porosity, large electrochemical area, roughened surface, and excellent electrocatalytic ability. The development of highly sensitive sensor is essential for H2O2 due to its great significance in physiological, biochemical, pharmaceutical and medicinal applications. A rapid, sensitive, selective, reproducible, and durable non-enzymatic H2O2 assay, by employing 3D GO-Co3O4 PHs modified electrode was described. The sensor offered excellent sensitivity with detection limit of 15 nM, which is superior to those of previously reported sensors. A real-time analysis was demonstrated in commercially acquired contact lens and disinfectant cleaning solutions without pre-treatment. (C) 2017 Elsevier B.V. All rights reserved.