Dopant-stimulated CuO Nanofibers for Electro-oxidation and Determination of Glucose

• Published in: Chemical research in Chinese universities 2013-10, Vol.29 (5), p.861-867
• Main Authors: Shi, Hong-yan, Wu, Ying, Wang, Wen, Song, Wen-bo, Liu, Tie-mei
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; CuO; Inorganic Chemistry; Organic Chemistry; Physical Chemistry; X-射线粉末衍射; 复合纳米纤维; 扫描电子显微镜; 掺杂剂; 电催化氧化; 直接测定; 葡萄糖
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-013-3103-x

We described the preparation of copper oxide composite nanofibers doped with carbon nanotubes （CuO/C-NFs） or nickel oxide（CuO/NiO-NFs） by electrospinning for direct glucose determination. The interest in exploring practical CuO/C-NFs and CuO/NiO-NFs electrode materials for sensor application was fascinated by the possibility of promoting electron transfer for kinetically unfavorable glucose oxidation reactions at a lower overpo- tential and thus improving the selectivity of the electrode for glucose in electroanalysis. The morphologies of CuO/C-NFs and CuO/NiO-NFs were characterized by scanning electron microscopy（SEM） and X-ray powder diffraction（XRD）. The electrocatalytic performances of glucose were evaluated in detail by cyclic voltammetry（CV） and chronoamperometry. Facile charge transport, enhanced current response（at a lower overpotential of ＋0.35 V）, improved stability and selectivity, as well as excellent resistance towards electrode fouling were observed at CuO/ C-NFs electrode in direct glucose electroanalysis. These merits are attributed to the highly porous three-dimensional network film structure of CuO/C-NFs electrode materials and the potential synergic catalytic effect of CuO and carbon nanotubes in composite nanofibers. This study may provide a new insight into metal oxide-based composite nanofibers obtained via electrospinning for fabricating novel and high performance sensors and devices.