电化学
石墨烯
电极
化学
氧化物
复合数
化学工程
检出限
材料科学
纳米技术
有机化学
复合材料
色谱法
工程类
物理化学
作者
Xinmeng Zhang,Xiaoyan Wen,Jiahan Yang,Ji Li,Yuanting Wu
标识
DOI:10.1016/j.microc.2023.108780
摘要
The Globe Thistles-Like (GTL) NiCo2S4 nanostructures were supported on reduced graphene oxide modified filter paper (FP). The prepared GTL NiCo2S4/rGO/FP is investigated as a disposable and flexible electrode for the electrochemical detection of H2O2 in alkaline media. Owing to the rich redox active sites, the synergistic effect between Co3+ and Ni2+, and the rapid electron transportation of substituting sulfur (S) for oxygen (O) in NiCo2O4, the GTL NiCo2S4/rGO/FP exhibits considerable enzyme-free H2O2 sensing performance with wide linear H2O2 ranging from 38.8 to 37306.8 μM, high sensitivity of 2.4326 mA mM−1 cm−2, and low detection limit of 0.08 μM. The GTL NiCo2S4/rGO/FP electrode has stable sensing performance and is highly selective toward analyte for physiological interfering species. The excellent electrochemical performance of GTL NiCo2S4/rGO/FP composite is attributed to the GTL structure of NiCo2S4. By studying the hydrothermal reaction time, electrochemical active surface area, and hydrophilic-hydrophobic surfaces of GTL NiCo2S4/rGO/FP composite, the relationship between the microstructure and sensing performance of the composite was elucidated. Surely this study opens up new possibilities for the application of low-cost, biodegradable flexible electrode materials in wearable sensors in the near future.
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