碳修饰CeO2纳米线阵列的制备及其在葡萄糖生物传感器中的应用

Synthesis of Carbon modified CeO2 nanowire arrays as platform for glucose biosensors

本文采用水热法在泡沫镍上制备出有序的CeO2纳米线阵列，在此基础上以葡萄糖作为碳源，在CeO2纳米线阵列上修饰上无定型碳。通过SEM、XRD以及拉曼光谱对样品进行表征。利用交联法将葡萄糖氧化酶负载于CeO2纳米线阵列表面从而构筑成葡萄糖生物传感器。通过对比研究发现：基于CeO2纳米线阵列的葡萄糖生物传感器在正电位下对葡萄糖具有较高的响应，但是其抗干扰能力较差；经过碳修饰之后的CeO2纳米线阵列在负电位下对葡萄糖具有较好的响应，同时具有较好的抗干扰性能。

CeO2 nanowire arrays fabricated by a facile hydrothermal method on nickel foam have been modified with carbon by a simple immersion-calcination route. SEM, XRD and Raman spectra are used to characterize of as-synthesized samples. Glucose oxidase is immobilized onto the surface of carbon modified CeO2 nanowire arrays to detect glucose concentration. The results show that biosensor based on CeO2 nanowire arrays exhibits good performance towards glucose detection at positive potential, but the selectivity of the biosensor based on CeO2 nanowire arrays is bad. However, glucose biosensor based on carbon modified CeO2 nanowire arrays demonstrates excellent performance under negative potential, which also shows superb selectivity.