Cu_(2)O/CuO复合材料的高效合成及其在葡萄糖检测中的应用

Efficient Synthesis of Cu_(2)O/CuO Composite and Its Application in Glucose Sensor

Cu_(2)O由于其具有优异的机械、热、化学稳定性和较低的过电势受到人们的重视,但是Cu_(2)O中由于Cu处于+1价态,属于亚稳态,在酸、碱性条件下都不稳定,因此需要对Cu_(2)O的表面进行优化处理。采用液相还原法和低温煅烧法高效合成Cu_(2)O/CuO复合纳米材料,通过X-射线衍射、扫描电子显微镜、透射电子显微镜、X-射线光电子能谱以及拉曼光谱对所制备的复合材料进行表征,并将其负载于玻碳电极(GCE)构建修饰电极用于检测葡萄糖浓度。结果表明,Cu_(2)O/CuO复合纳米材料具有更优秀的电催化性能,同时修饰电极对葡萄糖显示出较低的检测限和较高的灵敏度。因此Cu_(2)O/CuO纳米复合材料将在非酶葡萄糖传感领域具有良好的应用前景。

Cu_(2)O has attracted people′s attention on account of its excellent mechanical,thermal and chemical stability and low overpotential.However,The Cu in Cu_(2)O is+1 valence,which is in metastable state,resulting in its instability under both acid and alkaline conditions.Therefore,it is necessary to optimize the surface of Cu_(2)O.Cu_(2)O/CuO composite nanomaterials were efficiently synthesized by liquid phase reduction and low-temperature calcination.Various techniques,including X-ray diffraction,scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy and Raman spectroscopy were applied to evaluate the morphological characteristics of the obtained composite materials.The modified electrode was constructed by loading it on glassy carbon electrode(GCE)to detect glucose concentration.The results exhibited that the calcined surface of Cu_(2)O/CuO nanocomposites obtain better electrocatalytic performance,and the modified electrode showed lower detection limits and higher sensitivity for glucose.Therefore,Cu_(2)O/CuO nanocomposites will have widespread application prospects in non-enzymatic glucose sensing.