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<p>The Ag<sub>2</sub>O/CuO nanoshuttles stacked with nanosheets were fabricated in CH<sub>3</sub>COONa solution via direct current (DC) diaphragm discharge plasma technique, in which a silver-copper (Ag-Cu) alloy sheet was used as anode, and a graphite rod inserted into a quartz glass tube with a small hole on the sidewall was acted as cathode. The preparation mechanism of Ag<sub>2</sub>O/CuO was discussed in detail. The performance of Ag<sub>2</sub>O/CuO nanoshuttles as electrode material was assessed for sensing glucose. The results showed that Ag<sub>2</sub>O/CuO electrode exhibits a low limit of detection of 0.35 µM, high sensitivity of 1001.2 µA mM<sup>− 1</sup> cm<sup>− 2</sup>, wide linear range of 0.01–7.2 mM, and fast response time of only 0.4&#xa0;s. In addition, Ag<sub>2</sub>O/CuO has high selectivity, high stability and good repeatability. The glucose in human saliva is determined using Ag<sub>2</sub>O/CuO modified electrode, the recovery is 101.1%~103.2%, and the relative standard deviations (RSDs) are below 5%. All results indicated that Ag<sub>2</sub>O/CuO prepared by diaphragm discharge plasma can be regarded as an alternative electrode material for the glucose sensing. Compared with other synthesis methods, diaphragm discharge is a simple, effective, and green technique without expensive platinum, metal salts, alkali sources, and high temperature.</p> Graphical Abstract <p></p>

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Diaphragm Discharge Synthesis of Ag2O/CuO Nanoshuttle for Enzyme-Free Glucose Sensing

  • 期刊论文

  • 发表日期：

    2025年3月7日

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  • Jie Yu,
  • Huihui Ma,
  • Wenjing Ma,
  • Kai Wang,
  • Chenxu Liang,
  • Minrui Li,
  • Quanfang Lu

摘要

The Ag2O/CuO nanoshuttles stacked with nanosheets were fabricated in CH3COONa solution via direct current (DC) diaphragm discharge plasma technique, in which a silver-copper (Ag-Cu) alloy sheet was used as anode, and a graphite rod inserted into a quartz glass tube with a small hole on the sidewall was acted as cathode. The preparation mechanism of Ag2O/CuO was discussed in detail. The performance of Ag2O/CuO nanoshuttles as electrode material was assessed for sensing glucose. The results showed that Ag2O/CuO electrode exhibits a low limit of detection of 0.35 µM, high sensitivity of 1001.2 µA mM− 1 cm− 2, wide linear range of 0.01–7.2 mM, and fast response time of only 0.4 s. In addition, Ag2O/CuO has high selectivity, high stability and good repeatability. The glucose in human saliva is determined using Ag2O/CuO modified electrode, the recovery is 101.1%~103.2%, and the relative standard deviations (RSDs) are below 5%. All results indicated that Ag2O/CuO prepared by diaphragm discharge plasma can be regarded as an alternative electrode material for the glucose sensing. Compared with other synthesis methods, diaphragm discharge is a simple, effective, and green technique without expensive platinum, metal salts, alkali sources, and high temperature.

Graphical Abstract