多孔泡沫状CuO微纳米纤维的制备及用于无酶葡萄糖传感器

以静电纺丝技术结合煅烧工艺制备多孔泡沫状CuO微纳米纤维. 通过SEM, IR及XRD对材料进行形貌与结构表征. 样品表面粗糙且呈多孔泡沫状. 利用该材料对玻碳电极进行修饰, 并检测修饰电极对葡萄糖的电氧化性能, 发现该电极对葡萄糖的检测灵敏度为6.17 μA·L·mmol^-1·cm^-2, 检测限为65.3 μmol/L. 同时, 该电极对抗坏血酸、 尿酸和乙醇表现出良好的抗干扰性. 这些优良的性能取决于CuO特殊的形貌. 多孔泡沫结构有助于增大比表面积从而提高与葡萄糖的反应活性. 研究表明, 多孔泡沫状CuO微纳米纤维在无酶葡萄糖传感器方面具有潜在应用价值.

Non-enzymatic Glucose Sensor Based on the Electrospun Porous Foamy Copper Oxides Micro-nanofibers†

A non-enzymatic glucose sensor using novel porous foamy CuO micro-nanofibers was fabricated through electrospinning and subsequent calcination. Scanning electron microscopy(SEM), Fourier transform infrared spectrum(FTIR) and X-ray differaction(XRD) techniques were used for the morphology and structural characterization of CuO nanostructures. CuO micro-nanofibers are highly dense, uniform, and exhibited good crystalline array structure. Most of all, the product presents a special rough foamy morphology with many pores, which help to enlarge the specific surface area thereby enhancing the activity of electrooxidation of glucose. The prepared CuO micro-nanofibers were subsequently used to modify a glassy carbon electrode and then detailed investigated for direct electrocatalytic oxidation of glucose through cyclic voltammetry and chronoamperometry. The results manifest that the modified electrode has a good sensitivity of 6.17 μA·L·mmol^-1·cm^-2 and a low detection limit of 65.3 μmol/L. Moreover, it exhibits a good antiinterference to ascorbic acid(AA), uric acid(UA) and ethanol as well. The improved performances were ascribed to the high surface-to-volume ratio and the special morphology. Therefore, it concluded that the porous foamy CuO micro-nanofibers can be a promising non-enzyme glucose sensor.