CeO2 Nanorods Embedded in Ni(OH)2 Matrix for the Non-Enzymatic Detection of Glucose

The electrode based on cerium oxide (CeO2) nanorods embedded in nickel hydroxide (Ni(OH)(2)) matrix were prepared and used for detecting glucose non-enzymatically. The materials were characterized by X-ray diffraction, transmission electron microscopy (TEM), and so on. The results indicate that the response of CeO2/Ni(OH)(2) nanocomposite are significantly improved due to the synergetic effect between CeO2 and Ni(OH)(2). The optimum CeO2/Ni(OH)(2) nanocomposite electrode exhibits a detection range from 2 mu M to 6.62 mM, a sensitivity of 594 mu A mM(-1) cm(-2), an estimated detection limit of 1.13 mu M, and a response time less than 5 s. In addition, this biosensor also shows good selectivity, long term stability, and accurate measurement in juice on sale.