纳米Fe_2O_3/石墨烯复合材料的制备及其对NaNO_2的电化学传感研究

Ferric Oxide and Graphene-Ferric Oxide Nanocomposite:Preparation and Performance in Detection of Sodium Nitrite

本文利用水热合成法制备了Fe2O3纳米粒子(Fe2O3NPs)和纳米Fe2O3/石墨烯(rGO-Fe2O3NPs)复合材料,分别用于修饰电极,制备了检测亚硝酸钠(NaNO2)的电化学传感器,并详细考察了其性能指标.X射线衍射(XRD)和扫描电子显微镜(SEM)实验结果表明制备的rGO-Fe2O3NPs分布均匀,Fe2O3NPs与rGO直接混合可以实现Fe2O3纳米粒子在rGO表面的负载,混合后其形貌发生了较大的改变.通过实验检测,结果表明氧化铁纳米粒子的修饰电极表现出较好的传感器效果,掺杂石墨烯材料的传感性能略提高一些.

Ferric oxide nanoparticles （ Fe2 O3 NPs） and graphene-ferric oxide nanoparticles （ rGO-Fe2O3 NPs） hybrid materials were synthesized, then they were used in nitrite（NaNO2） electrochemical sensing. The performance of the sensor was investigated in detail. The results of scanning electron microscopy（SEM） showed that rGO- Fe2O3 NPs distributed uniformly on glassy carbon electrode. The Fe2 O3 NPs could adsorb onto through electrostatic interaction to achieve the decoration of oxide on the surface of graphene films. However, the resulted product had different morphology to that of Fe2O3 NPs. Detection through the experiment, the result showed that iron oxide nanoparticles modified electrodes showed good effect of sensors, sensing performance of doped graphene materials slightly higher.