CuO/Cu2O nanofibers as electrode materials for non-enzymatic glucose sensors with improved sensitivity
CuO/Cu2O nanofibers as electrode materials for non-enzymatic glucose sensors with improved sensitivity
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CuO/Cu2O纳米纤维作为非酶葡萄糖传感器的电极材料，具有更高的灵敏度
DOI：
10.1039/c4ra03258f
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发表时间：
2014-01-01
期刊：
影响因子：
3.9
通讯作者：
Liu, Yichun
中科院分区：
文献类型：
--
作者：
Lu, Na;Shao, Changlu;Liu, Yichun
CuO 纳米纤维（NFs）是通过传统的静电纺丝技术和随后的热处理工艺制造的。以CuO NF为前驱体，葡萄糖为还原剂，通过部分还原CuO NF，获得了具有高表面积和超长一维（1D）纳米结构的CuO/Cu2O NF。与纯CuO NFs相比，CuO/Cu2O NFs作为非酶电极材料，在葡萄糖的电流检测中表现出更高的灵敏度（830 μA mM−1 cm−2）和更宽的检测范围（0.5 mM至10 mM）。优异的电催化性能可归因于以下优点：（1）具有Cu（II）/Cu（I）多氧化态体系的CuO/Cu2O NFs可以促进电极材料与葡萄糖之间的氧化还原反应，并且由于协同效应，反应位点变得更加活跃； (2)部分还原后CuO/Cu2O NFs表面变得更加光滑，导致葡萄糖氧化过程中中间体的吸附减少，检测范围扩大。因此，具有多种氧化态系统的CuO/Cu2O复合NFs电极材料将成为开发非酶葡萄糖传感器的有希望的候选材料。
CuO nanofibers (NFs) were fabricated via the traditional electrospinning technique and subsequent thermal treatment processes. Using CuO NFs as precursors and glucose as a reducing agent, CuO/Cu2O NFs, with high surface areas and ultralong one dimensional (1D) nanostructures, were obtained by a partial reduction of CuO NFs. Comparing with pure CuO NFs, CuO/Cu2O NFs, as non-enzymatic electrode materials, showed a much higher sensitivity of 830 μA mM−1 cm−2 and a much wider detection range from 0.5 mM to 10 mM for the amperometric detection of glucose. The excellent electrocatalytic performances could be ascribed to the following advantages: (1) the CuO/Cu2O NFs with Cu(II)/Cu(I) multiple oxidation states system could promote the redox reactions between electrode materials and glucose, and the reactive sites became more active due to the synergic effect; (2) the surface of CuO/Cu2O NFs became smoother after partial reduction, resulting in less adsorption of the intermediates during the oxidation of glucose, generating the enlarged detection range. Therefore, the CuO/Cu2O composite NFs electrode materials, with a multiple oxidation states system, would be promising candidates for the development of non-enzymatic glucose sensors.