钴酸镍空心球的合成及其抗坏血酸电化学敏感性能

NiCo2O4 Hollow Spheres:Synthesis of and Electrochemical Sensitivity against Ascorbic Acid

本文以氧化亚铜小球为模板,采用简单温和的化学方法成功刻蚀制备出了钴酸镍空心球。通过多种表征手段对样品的形貌及组成进行了表征,结果表明,钴酸镍为空心结构并保持了氧化亚铜的形貌,粒径约为350nm,具有多晶的特征。将该材料修饰的电极应用到抗坏血酸电化学传感器中,测试结果表明,其对抗坏血酸的检测极限为3×10-7 M(S/N=3),线性相关系数为0.9993,线性检测范围为0.1~3mM,灵敏度高达1148.7μA·mM-1·cm-2,并具有良好的选择性。

NiCo2O4 hollow spheres were prepared via a facile and mild chemical etching process with Cu2O spheres as hard template.Experimental characterization certified that the obtained NiCo2O4 hollow spheres had the morphology of Cu2O and were highly homogeneous dispersed with polycrystalline structure.The NiCo2O4 modified glassy carbon electrode（GCE）was used for selective detection of ascorbic acid.The results showed that it performed a detection limit of 3×10-7 M（S/N=3）,a wide linear ranged up to 0.1 mM3 mM,a high sensitivity of 1148.7μA·mM-1·cm-2 and a good selectivity.