Cavitation regulated sonochemical synthesis of flexible self-supported CuO@PDA/CC electrode for highly sensitive glucose sensor

电极 材料科学 电化学 纳米结构 纳米技术 化学工程 纳米颗粒 化学 工程类 物理化学
作者
Bo Shao,Fang Chen,Jianyuan Wang,Wei Zhai
出处
期刊:Electrochimica Acta [Elsevier BV]
卷期号:441: 141801-141801 被引量:4
标识
DOI:10.1016/j.electacta.2022.141801
摘要

Sonochemical synthesis is recognized as a promising high-efficiency method for fabricating transition metal oxides (TMOs) based flexible self-supported electrodes as nonenzymatic glucose sensor. However, it is still a challenge to obtain TMOs self-supported electrodes with well-controlled TMOs nanostructure and desirable interfacial properties via a sonochemical approach because of the uncontrollability of transient cavitation. In this study, CuO@polydopamine (PDA) nanoparticles (NPs) are in situ grown onto carbon cloth (CC) to fabricate CuO@PDA/CC self-supported electrode via a sonochemical process. The sonochemically synthesized PDA not only stabilized the transient cavitation intensity, but also regulated the growth of CuO due to the strong chelating ability between Cu2+ and catechol groups from PDA. It is determined that the mean size of CuO@PDA NPs on the CuO@PDA/CC electrode is less than 100 nm with a narrow size distribution. Attributed to high electrochemical active surface area (4.61 mF cm−2) and low interface resistance (2.35 Ω), CuO@PDA/CC electrode displays excellent electrochemical performance as a glucose sensor with high sensitivity of 1.843 μA cm−2 mM−1 in a wide linear range up to 4.985 mM and excellent stability. This work provides a facile approach to fabricating the flexible self-supported electrodes with well-controlled nanostructure and desirable interfacial properties for high-performance electrochemical sensors via regulating the transient cavitation intensity in the sonochemical process.
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