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Self-assembly of porous copper oxide hierarchical nanostructures for selective determinations of glucose and ascorbic acid

机译：多孔铜氧化物等级纳米结构的自组装，用于葡萄糖和抗坏血酸的选择性测定

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摘要

The simple design of CuO micro-/nanostructures has recently attracted tremendous interest particularly for the enzyme-less sensing of biological molecules due to their intrinsic electronic and catalytic properties. Consequently attention has been directed to the development of new CuO nanomaterials that have multi-interdisciplinary applications. Herein, we report for the first time the fabrication of hierarchical porous CuO micro-/nanostructures with flower-and hollow sphere-like morphology via a facile hydrothermal method. Our experimental findings clarify that the source of the copper-ions effectively control the assembly of CuO nano-building blocks via the one-step hydrolysis of [Cu(NH3)(4)(H2O)(2)]SO4 and [Cu(NH3)(4)(H2O)(2)]Cl-2 precursors, which produce hollow sphere and flower-like morphologies for sensitive and selective determination of ascorbic acid and glucose, respectively. Moreover, such unique properties of macro-/mesoporous CuO with defined dimensions and topologies offer minimized diffusive resistance for the dispersion of active sites. The best performance of the glucose and ascorbic sensor can be obtained at + 0.55 V in 0.1 M sodium hydroxide solution. The as-prepared CuO modified (drop-casted) screen-printed electrodes (SPE) exhibit a fast electroactive response with high sensitivity within a wide concentration range of glucose and ascorbic acid in real samples. Significantly, the anion-dependent approach might be used to control effectively the expansion and features of other metal oxide micro-/nanostructures.
机译：CuO微/纳米结构的简单设计最近引起了巨大的兴趣，特别是由于其固有的电子和催化性能而对生物分子的酶感测量较小。因此，注意力旨在开发具有多跨学科应用的新Cuo纳米材料。在此，我们通过容易水热法向第一次报告使用花和中空球形形态的分层多孔CUO微/纳米结构的制备。我们的实验结果阐明了铜离子的来源通过[Cu（NH3）（4）（4）（2）] SO 4和[Cu（NH3）的一步水解有效地控制CuO纳米积木的组装。 ）（4）（H 2 O）（2）] Cl-2前体，其产生中空球体和花样形态，分别用于敏感和选择性测定抗坏血酸和葡萄糖。此外，具有限定尺寸和拓扑结构的宏观/介孔CuO的这种独特性质，最小化了活性位点的分散的扩散抗性。葡萄糖和抗坏血管传感器的最佳性能可以在0.1M氢氧化钠溶液中获得+ 0.55V。制备的CuO改性（滴浇铸）丝网印刷电极（SPE）在真实样品中具有高浓度范围内的葡萄糖和抗坏血酸内具有高灵敏度的快速电活性响应。显着地，阴离子依赖性方法可用于有效地控制其他金属氧化物微/纳米结构的膨胀和特征。

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  • 来源
    《RSC Advances》 |2016年第18期|共9页
  • 作者

    Mahmoud Bahaa G.; Khairy Mohamed; Rashwan Farouk A.; Foster Christopher W.; Banks Craig E.;

  • 作者单位

    Sohag Univ Fac Sci Dept Chem Sohag Egypt;

    Sohag Univ Fac Sci Dept Chem Sohag Egypt;

    Sohag Univ Fac Sci Dept Chem Sohag Egypt;

    Manchester Metropolitan Univ Div Chem &

    Environm Sch Sci &

    Environm Fac Sci &

    Engn Chester St Manchester M1 5GD Lancs England;

    Manchester Metropolitan Univ Div Chem &

    Environm Sch Sci &

    Environm Fac Sci &

    Engn Chester St Manchester M1 5GD Lancs England;

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  • 正文语种 eng
  • 中图分类 化学;
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